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1. Adaptation of evapoporometry (EP) to characterize the continuous pores and interpore connectivity in polymeric membranes

Author:
Tanis-Kanbur, Melike Begum; Zamani, Farhad; Krantz, William B.; Hu, Xiao; Chew, Jia Wei
Source:
Journal of membrane science 2019 v.575 pp. 17-27
ISSN:
0376-7388
Subject:
artificial membranes; equations; evaporation rate; liquids; thermoplastics
Abstract:
... Evapoporometry (EP) determines the pore-size distribution (PSD) based on the Kelvin equation that relates the evaporation rate of a volatile wetting liquid to the pore diameter. EP offers several advantages relative to other PSD characterization methods. EP is adapted here to characterize only the continuous pores rather than all the pores. This adaptation involves sequentially injecting a volatil ...
DOI:
10.1016/j.memsci.2018.12.050

2. Adsorption of 3-Aminoacetanilide from aqueous solution by chemically modified hyper-crosslinked resins: Adsorption equilibrium, thermodynamics and selectivity

Author:
Wang, Tao; Shen, Chunhui; Wang, Nan; Dai, Jianjun; Liu, Zongtang; Fei, Zhenghao
Source:
Colloids and surfaces 2019 v.575 pp. 346-351
ISSN:
0927-7757
Subject:
adsorbents; adsorption; aqueous solutions; endothermy; hydrochloric acid; models; pH; porosity; resins; sorption isotherms; surface area; thermodynamics
Abstract:
... Herein a series of chemically modified hyper-crosslinked resins were prepared and the four resins had been employed to remove 3-Aminoacetanilide from aqueous solution. Pore size and BET specific surface area of the four resins were improved by characterization, and specific surface area size was SAMR > PRLMR > TAMR > IDLMR. The results showed that Freundlich model could fit the adsorption isotherm ...
DOI:
10.1016/j.colsurfa.2019.05.029

3. Adsorption of arsenic by activated charcoal coated zirconium-manganese nanocomposite: Performance and mechanism

Author:
Yin, Yuwei; Zhou, Tingting; Luo, Hanjin; Geng, Junjie; Yu, Wenyi; Jiang, Zhongjie
Source:
Colloids and surfaces 2019 v.575 pp. 318-328
ISSN:
0927-7757
Subject:
activated carbon; adsorption; anions; arsenic; bicarbonates; chlorides; drinking water; fluorides; manganese; manganese dioxide; nanocomposites; nitrates; oxidation; phosphates; pollution; sorbents; sulfates; surface area; toxicity; zirconium; zirconium oxide
Abstract:
... As(III) is more toxic and harder to remove than As(V) though they are always co-exist in water. In order to effectively eliminate pollution of arsenic and explore the adsorption mechanism, a novel-innovative hydrated zirconium oxide (ZrO(OH)2) and manganese dioxide (MnO2) coated modified activated charcoal (Zr/Mn/C) prepared via a co-precipitation-hydrothermal method. Results showed that As(III) c ...
DOI:
10.1016/j.colsurfa.2019.04.093

4. Adsorption of sulfamethoxazole and tetracycline on montmorillonite in single and binary systems

Author:
Wu, Mi; Zhao, Shifeng; Tang, Mingxiu; Jing, Ruisen; Shao, Yifei; Liu, Xijuan; Dong, Yuanpeng; Li, Mingzhu; Liao, Qiang; Lv, Guocheng; Zhang, Qian; Meng, Zilin; Liu, Aiju
Source:
Colloids and surfaces 2019 v.575 pp. 264-270
ISSN:
0927-7757
Subject:
adsorbents; adsorption; hydrophobic bonding; kinetics; mechanism of action; molecular dynamics; montmorillonite; sorption isotherms; sulfamethoxazole; tetracycline
Abstract:
... The contaminantsin environment generally do not exist alone and possess different physical and chemical properties, their environmental behavior and mechanism of action in environment are more complicated. Montmorillonite was employed as adsorbent to remove tetracycline (TC) and sulfamethoxazole (SMZ) respectively and simultaneously under batch kinetic and different solution conditions. As the con ...
DOI:
10.1016/j.colsurfa.2019.05.025

5. Adsorptive removal of Pb(II) ions from aqueous solutions by multi-walled carbon nanotubes functionalised by selenophosphoryl groups: Kinetic, mechanism, and thermodynamic studies

Author:
Kończyk, Joanna; Żarska, Sandra; Ciesielski, Wojciech
Source:
Colloids and surfaces 2019 v.575 pp. 271-282
ISSN:
0927-7757
Subject:
adsorbents; adsorption; aqueous solutions; cadmium; carbon nanotubes; cobalt; copper; endothermy; ions; lead; models; moieties; nickel; pH; sorption isotherms; temperature; thermodynamics; zinc
Abstract:
... Multi-walled carbon nanotubes functionalised by di-t-butyl selenophosphoryl groups were used to remove Pb(II) ions from synthetic and real aqueous solutions. The effects of the initial Pb(II) ion concentrations, pH, and volume of the synthetic aqueous solution, adsorbent dosage, and temperature on the efficiency of the adsorption process were investigated in batch experiments. The highest Pb(II) r ...
DOI:
10.1016/j.colsurfa.2019.04.058

6. Amine functionalized graphene oxide containing C16 chain grafted with poly(ether sulfone) by DABCO coupling: Anion exchange membrane for vanadium redox flow battery

Author:
Shukla, Geetanjali; Shahi, Vinod K.
Source:
Journal of membrane science 2019 v.575 pp. 109-117
ISSN:
0376-7388
Subject:
water uptake; ion exchange capacity; graphene oxide; anion-exchange membranes; vanadium; oxidation; polymers; separation; batteries; permeability
Abstract:
... Under strong oxidative environment of vanadium redox flow batteries (VRFB), membrane instability is a serious challenge. Anion exchange membranes (AEMs) are expected to reduce vanadium ion permeability due to Donnan exclusion. Herein, we report long alkyl chain grafted quaternized graphene oxide bonded poly(ether sulfone) by 1,4-diazabicyclo[2,2,2]octane (DABCO) coupling, which provides plenty of ...
DOI:
10.1016/j.memsci.2019.01.008

7. An insight into the solar demulsification of highly emulsified water produced from oilfields by monitoring the viscosity, zeta potential, particle size and rheology

Author:
Fan, Meiling; Nie, Chunhong; Du, Huan; Ni, Jiawen; Wang, Baohui; Wang, Xirui
Source:
Colloids and surfaces 2019 v.575 pp. 144-154
ISSN:
0927-7757
Subject:
creaming; droplet size; droplets; electrochemistry; electrostatic interactions; emulsions; energy; engineering; environmental protection; monitoring; oil fields; oils; oxidation; particle size; polymers; rheology; solar energy; surfactants; temperature; viscoelasticity; viscosity; water treatment; zeta potential
Abstract:
... Facing increasing challenges to oil field production and energy utilization, tertiary oil recovery technologies, exemplified by alkali-surfactant-polymer (ASP) flooding, can significantly improve the oil recovery. However, it has produced an enormous amount of highly emulsified water to increase the tough water treatment in the oilfield. Currently, the dominated treatments have been focused on the ...
DOI:
10.1016/j.colsurfa.2019.05.012

8. A novel smart membrane with ion-recognizable nanogels as gates on interconnected pores for simple and rapid detection of trace lead(II) ions in water

Author:
Wang, Yuan; Liu, Zhuang; Luo, Feng; Peng, Han-Yu; Zhang, Shu-Gui; Xie, Rui; Ju, Xiao-Jie; Wang, Wei; Faraj, Yousef; Chu, Liang-Yin
Source:
Journal of membrane science 2019 v.575 pp. 28-37
ISSN:
0376-7388
Subject:
artificial membranes; detection limit; drinking water; gravity; ions; lead; monitoring; nanoparticles; rapid methods; separation; static pressure
Abstract:
... A novel smart membrane with ion-recognizable nanogels as gates on interconnected pores is developed for simple and rapid detection of trace lead(II) ions in water. The membrane is prepared via one-step vapor-induced phase separation (VIPS) method, and featured with interconnected porous structure and Pb2+-responsive poly(N-isopropylacrylamide-co-benzo-18-crown-6-acrylamide) (PNB) nanogels on polye ...
DOI:
10.1016/j.memsci.2019.01.002

9. A novel thin film composite hollow fiber osmotic membrane with one-step prepared dual-layer substrate for sludge thickening

Author:
Ng, Daniel Yee Fan; Wu, Bing; Chen, Yunfeng; Dong, Zhili; Wang, Rong
Source:
Journal of membrane science 2019 v.575 pp. 98-108
ISSN:
0376-7388
Subject:
activated sludge; artificial membranes; energy efficiency; humic acids; necropsy; osmosis; polymerization; sodium chloride; ultrafiltration
Abstract:
... Forward osmosis (FO) membranes have received attention as an energy-efficient and low-cost technique in stream concentrating processes. In this work, a novel double-skinned hollow fiber thin film composite (TFC) FO membrane has been successfully fabricated, which consists of a one-step prepared dual layer substrate and a thin inner selective layer formed via interfacial polymerization. The substra ...
DOI:
10.1016/j.memsci.2019.01.007

10. Approaches for probing and evaluating mammalian sphingolipid metabolism

Author:
Snider, Justin M.; Luberto, Chiara; Hannun, Yusuf A.
Source:
Analytical biochemistry 2019 v.575 pp. 70-86
ISSN:
0003-2697
Subject:
ceramides; enzyme activity; enzymes; in vitro studies; mammals; metabolism; sphingosine
Abstract:
... Sphingolipid metabolism plays a critical role in regulating processes that control cellular fate. This dynamic pathway can generate and degrade the central players: ceramide, sphingosine and sphingosine-1-phosphate in almost any membrane in the cell, adding an unexpected level of complexity in deciphering signaling events. While in vitro assays have been developed for most enzymes in SL metabolism ...
DOI:
10.1016/j.ab.2019.03.014

11. ATR-FTIR spectroscopy and thermogravimetry characterization of water in polyelectrolyte-surfactant hydrogels

Author:
Enev, Vojtěch; Sedláček, Petr; Jarábková, Sabína; Velcer, Tomáš; Pekař, Miloslav
Source:
Colloids and surfaces 2019 v.575 pp. 1-9
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; anionic surfactants; dextran; drying; evaporation; hydrogels; hydrogen; models; thermogravimetry
Abstract:
... Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and thermogravimetric analysis (TGA) were evaluated as useful techniques to study bulk and hydration water in hydrogels. Hydrogels formed by cationized dextran (DEAE-dextran) and anionic surfactants were used as model materials. The IR technique was applied both on fresh samples and on dehydrating samples during the eva ...
DOI:
10.1016/j.colsurfa.2019.04.089

12. Betaine-assisted recombinase polymerase assay with enhanced specificity

Author:
Luo, Guang-Cheng; Yi, Ting-Ting; Jiang, Bing; Guo, Xiao-lan; Zhang, Guo-Yuan
Source:
Analytical biochemistry 2019 v.575 pp. 36-39
ISSN:
0003-2697
Subject:
DNA; Hepatitis B virus; betaine; enzymes; polymerase chain reaction
Abstract:
... Recombinase polymerase amplification (RPA) is a widespread isothermal amplification method and regarded as an excellent candidate to replace polymerase chain reaction. However, the specificity of RPA is not always satisfactory when the sample contains amounts of background DNA. Herein, we report a novel RPA method named betaine-assisted RPA (B-RPA) that uses inexpensive betaine to avoid nonspecifi ...
DOI:
10.1016/j.ab.2019.03.018

13. Cage-like hierarchically mesoporous hollow silica microspheres templated by mesomorphous polyelectrolyte-surfactant complexes for noble metal nanoparticles immobilization

Author:
Du, Guo; Song, Ya; Li, Na; Lijian, Xu; Tong, Chao; Feng, Yahui; Chen, Tiehong; Xu, Jianxiong
Source:
Colloids and surfaces 2019 v.575 pp. 129-139
ISSN:
0927-7757
Subject:
catalysts; micelles; microparticles; nanoparticles; nanopores; p-nitrophenol; palladium; polyacrylic acid; porous media; silica
Abstract:
... In this paper, well-defined CHMSs were synthesized through co-hydrolysis of tetraethylsiloxane (TEOS) and 3-aminopropyltriethoxysilane (APTS) template by mesomorphous complexes of hexadecylpyridinium chloride (CPC) and poly(acrylic acid) (PAA). It was demonstrated that the adding amount of APTS in the reaction system played a key role in the formation of the hollow cage-like structure and a possib ...
DOI:
10.1016/j.colsurfa.2019.04.088

14. Can the variance in membrane performance influence the design of organic solvent nanofiltration processes?

Author:
Böcking, Axel; Koleva, Velichka; Wind, Jan; Thiermeyer, Yvonne; Blumenschein, Stefanie; Goebel, Rebecca; Skiborowski, Mirko; Wessling, Matthias
Source:
Journal of membrane science 2019 v.575 pp. 217-228
ISSN:
0376-7388
Subject:
algorithms; artificial membranes; nanofiltration; physiological transport; polymers; process design; solutes; solvents; variance
Abstract:
... The development of organic solvent nanofiltration (OSN) membranes has been a continuous effort during the past decade. Several groups generated and published experimental results and simulations with either tailor-made membranes or industrial products. The published data space is diverse, with a single publication often focusing on a certain membrane only, a group of specific solutes only, on the ...
DOI:
10.1016/j.memsci.2018.12.077

15. Conceptual design of membrane-based pre-combustion CO2 capture process: Role of permeance and selectivity on performance and costs

Author:
Giordano, Lorena; Gubis, Jan; Bierman, Giljam; Kapteijn, Freek
Source:
Journal of membrane science 2019 v.575 pp. 229-241
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; combustion; cost effectiveness; cost estimates; economic performance; energy; gasification; hydrogen; liquids; pollution; pollution control; power generation; power plants; research and development; solvents; synthesis gas
Abstract:
... Pre-combustion CO2 capture is regarded as a promising option to mitigate the environmental pollution from coal combustion, due to its relatively low energy duty and prospects for the use of hydrogen in power generation and industrial sectors. Nowadays, research and development efforts are mainly focusing on advanced technologies to separate H2 and CO2 from a synthesis gas of a gasification-based p ...
DOI:
10.1016/j.memsci.2018.12.063

16. Defects-healing of SAPO-34 membrane by post-synthesis modification using organosilica for selective CO2 separation

Author:
Mu, Yibing; Chen, Huanhao; Xiang, Huan; Lan, Lan; Shao, Yan; Fan, Xiaolei; Hardacre, Christopher
Source:
Journal of membrane science 2019 v.575 pp. 80-88
ISSN:
0376-7388
Subject:
aluminum oxide; artificial membranes; carbon dioxide; coatings; methane; zeolites
Abstract:
... It is challenging to avoid the formation of defects in zeolite membranes during their preparation. Herein, we present a facile vacuum-assisted deposition (VAD) method as a feasible solution to address this challenge. Defective SAPO-34 membranes supported on tubular porous alumina were healed using bis(triethoxysilyl)ethane (BTESE)-derived organosilica via VAD, showing an improved performance in th ...
DOI:
10.1016/j.memsci.2019.01.004

17. Development and characterization of dual sensitive poly(N,N-diethyl acrylamide) grafted alginate microparticles

Author:
Işıklan, Nuran; Altınışık, Zeynep
Source:
Colloids and surfaces 2019 v.575 pp. 352-362
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acrylamides; alginates; crosslinking; differential scanning calorimetry; fluorouracil; microparticles; pH; scanning electron microscopy; temperature; tissue engineering
Abstract:
... Temperature and pH dual sensitive materials have attracted much interest in the fields of tissue engineering and drug delivery. In this study, a novel temperature and pH dual sensitive poly(N,N-diethyl acrylamide) grafted alginate (A-g-PDEA) microparticles were developed for 5-fluorouracil (5-FU) delivery. The structures of 5-FU loaded A-g-PDEA microparticles were characterized by FTIR, DSC, SEM, ...
DOI:
10.1016/j.colsurfa.2019.05.013

18. Development of an HPLC-based guanosine monophosphate kinase assay and application to Plasmodium vivax guanylate kinase

Author:
Pedro, Liliana; Cross, Megan; Hofmann, Andreas; Mak, Tin; Quinn, Ronald J.
Source:
Analytical biochemistry 2019 v.575 pp. 63-69
ISSN:
0003-2697
Subject:
Plasmodium vivax; absorption; adenosine diphosphate; adenosine triphosphate; drugs; enzymatic reactions; enzyme activity; enzymes; guanosine monophosphate; high performance liquid chromatography; inhibitory concentration 50; malaria
Abstract:
... The development of a high-performance liquid chromatography (HPLC)-based method, for guanosine monophosphate kinase activity assays, is presented. The method uses the intrinsic UV absorption (at 260 nm) of substrates and products of the enzymatic reaction (GMP, ATP, ADP and GDP) to unambiguously determine percent conversion of substrate into product. It uses a commercially available C18 column whi ...
DOI:
10.1016/j.ab.2019.03.022

19. Development of duplex-crossed allele-specific PCR targeting of TPMT*3B and *3C using crossed allele-specific blockers to eliminate non-specific amplification

Author:
Qu, Xue-Mei; Zhao, Na; Mo, Qin-Yun; Yao, Pu; Su, Ning; Wei, Kun; Wang, Liu; Huang, Jun-Fu; Ren, Xiao-Dong; Ren, Sai; Fu, Wei-Ling; Huang, Qing
Source:
Analytical biochemistry 2019 v.575 pp. 54-62
ISSN:
0003-2697
Subject:
DNA-directed DNA polymerase; adverse effects; fluorescence; heterozygosity; loss-of-function mutation; nationalities and ethnic groups; polymerase chain reaction; therapeutics; thermodynamics; thiopurine S-methyltransferase; toxicity
Abstract:
... Prospective testing for variants in the thiopurine S-methyltransferase (TPMT) is considered a key process in the development of thiopurine therapy. This testing is done to avoid toxicity and side effects in the management of diverse immunological and malignant conditions. Real-time fluorescent PCR techniques using duplex-crossed allele-specific primers in a single tube (DCAS-PCR) were developed in ...
DOI:
10.1016/j.ab.2019.03.019

20. Effects of cations on the yield stress of a highly concentrated suspension of glass beads with the addition of polycarboxylate superplasticizer

Author:
Lu, Zichen; Liu, Siyu; Stephan, Dietmar
Source:
Colloids and surfaces 2019 v.575 pp. 176-183
ISSN:
0927-7757
Subject:
adsorption; calcium; cations; glass; isoelectric point; polymers; potassium; rheological properties
Abstract:
... The effects of potassium and calcium ions on the yield stress of highly concentrated suspensions of glass beads in the presence of polycarboxylate superplasticizer (PCE) was investigated in this study. It was found that the presence of ions, regardless of whether they are calcium or potassium, can significantly increase the yield stress of glass bead suspensions (GBS) without polymer. Moreover, th ...
DOI:
10.1016/j.colsurfa.2019.05.015

21. Effects of internal geometry on hydrodynamics of dissolved air flotation (DAF) tank: An experimental study using particle image velocimetry (PIV)

Author:
Fanaie, Vahid Reza; Khiadani, Mehdi; Ayres, Thomas
Source:
Colloids and surfaces 2019 v.575 pp. 382-390
ISSN:
0927-7757
Subject:
air; geometry; hydrodynamics; microbubbles; particle image velocimetry; tanks
Abstract:
... The hydrodynamics of flotation tanks significantly affect the removal efficiency of dissolved air flotation (DAF) systems. In the present study, for the first time, particle image velocimetry (PIV) was used to provide a fully detailed map of the velocity field in the contact and separation zones of a real scale DAF system under the influence of different internal geometries. The observed flow patt ...
DOI:
10.1016/j.colsurfa.2019.05.027

22. Efficient numerical incorporation of water management operations in integrated hydrosystem models: Application to tile drainage and reservoir operating systems

Author:
Hwang, Hyoun-Tae; Park, Young-Jin; Frey, Steven K.; Callaghan, Michael V.; Berg, Steven J.; Lapen, David R.; Sudicky, Edward A.
Source:
Journal of hydrology 2019 v.575 pp. 1253-1266
ISSN:
0022-1694
Subject:
farms; groundwater; groundwater extraction; hydrologic models; streams; surface water; tile drainage; water allocation; water flow; water rights; water supply; wells
Abstract:
... Hydrologic control structures are designed to connect or disconnect water movement in natural surface water-groundwater systems, and it is important to represent these features effectively within a finite difference/element model without over-discretization. This study presents efficient numerical schemes for operating water allocation and water rights systems in integrated hydrosystem models. We ...
DOI:
10.1016/j.jhydrol.2019.03.098

23. Electrospun polyvinylidene fluoride-based fibrous nanocomposite membranes reinforced by cellulose nanocrystals for efficient separation of water-in-oil emulsions

Author:
Wang, Xue; Cheng, Wanli; Wang, Dong; Ni, Xiaohui; Han, Guangping
Source:
Journal of membrane science 2019 v.575 pp. 71-79
ISSN:
0376-7388
Subject:
artificial membranes; cellulose; contact angle; emulsions; mechanical properties; microstructure; nanocomposites; nanocrystals; nanofibers; oils; porosity; thermoplastics
Abstract:
... A hydrophobic-oleophilic nanofibrous membrane was successfully produced by incorporating cellulose nanocrystals (CNC) into polyvinylidene fluoride (PVDF) via an electrospinning process. The effects of levels of CNC loading on membrane microstructure, mechanical properties, water and oil contact angle and efficacy of separating oil from water-in-oil emulsions were investigated. The results demonstr ...
DOI:
10.1016/j.memsci.2018.12.057

24. Elucidating the impact of polymer crosslinking and fixed carrier on enhanced water transport during desalination using pervaporation membranes

Author:
Xue, Yun long; Lau, Cher Hon; Cao, Bing; Li, Pei
Source:
Journal of membrane science 2019 v.575 pp. 135-146
ISSN:
0376-7388
Subject:
artificial membranes; crosslinking; pervaporation; cross-linking reagents; diffusivity; desalination; sulfonic acids; polymers; drinking water
Abstract:
... Crosslinking is a well-established technique to enhance chemical stability of polymer membranes but at the expense of lower flux. We previously demonstrated that this trade-off between chemical stability and separation performance can be overcome through the judicious selection of a crosslinking agent, 4-sulfophthalic acid (SPTA), which also functioned as a fixed carrier site. The mechanism underp ...
DOI:
10.1016/j.memsci.2019.01.012

25. Elucidation of factors responsible for formation of white flecks in reconstituted fat filled milk powders

Author:
Schmidmeier, C.; O’Gorman, C.; Drapala, K.P.; Waldron, D.S.; O’Mahony, J.A.
Source:
Colloids and surfaces 2019 v.575 pp. 245-255
ISSN:
0927-7757
Subject:
anionic surfactants; chemical bonding; colloids; electrostatic interactions; emulsions; lactose; lipid content; liquids; maltodextrins; minerals; mixing; powders; protein denaturation; reducing agents; skim milk; spray drying; thermal stability; vegetable oil; vitamins; whey protein; yogurt
Abstract:
... Fat filled milk powders (FFMP) are formulated by blending skim milk and vegetable oil, to which lactose, permeate, sugar, maltodextrin, vitamins and minerals may also be added. The liquid mix is usually homogenised and spray dried, with agglomeration and lecithination, to produce powders for a range of end-user applications including drinking milk, yoghurt base and coffee whitening. Thus, it is im ...
DOI:
10.1016/j.colsurfa.2019.03.034

26. Enhanced adsorption of Rhodamine B by magnetic nitrogen-doped porous carbon prepared from bimetallic ZIFs

Author:
Zhang, Jiajin; Hu, Xiaoyan; Yan, Xinlong; Feng, Rui; Zhou, Min; Xue, Jianliang
Source:
Colloids and surfaces 2019 v.575 pp. 10-17
ISSN:
0927-7757
Subject:
adsorbents; adsorption; aqueous solutions; carbon; carbonization; magnetism; nitrogen; polyvinylpyrrolidone; rhodamines; wastewater treatment
Abstract:
... Heteroatom- doped porous carbons have been proposed as promising adsorbents for wastewater treatment. Here, a nitrogen-enriched magnetic porous carbon was prepared by using bimetallic zeolitic imidazolate frameworks (ZIFs) as the precursors and polyvinyl pyrrolidone (PVP) as the auxiliary carbon/nitrogen source, with direct carbonization at 900 °C. The obtained carbon was applied for removing Rhod ...
DOI:
10.1016/j.colsurfa.2019.04.091

27. Enhanced performance of conductive polysulfone/MWCNT/PANI ultrafiltration membrane in an online fouling monitoring application

Author:
Yuan, Xue-Shuang; Guo, Zhi-Ying; Geng, Hong-Zhang; Rhen, Danielle S.; Wang, Luda; Yuan, Xiao-Tong; Li, Jianxin
Source:
Journal of membrane science 2019 v.575 pp. 160-169
ISSN:
0376-7388
Subject:
artificial membranes; bovine serum albumin; carbon nanotubes; electrochemistry; fouling; industrialization; mixing; monitoring; nanofibers; pollutants; pollution; polymers; porosity; ultrafiltration; water treatment
Abstract:
... Membrane fouling is an inevitable aspect of water treatment that severely limits membrane performance. Therefore, simple and effective membrane fouling monitoring methods are highly sought after to assess the level of fouling before damage occurs or membrane replacement is necessary. Here, conductive blended ultrafiltration (UF) membranes prepared by blending conducting polyaniline (PANI) nanofibe ...
DOI:
10.1016/j.memsci.2019.01.010

28. Enhanced the swelling resistance of polyamide membranes with reinforced concrete structure

Author:
Wang, Shuhao; Gu, Kaifeng; Wang, Jian; Zhou, Yong; Gao, Congjie
Source:
Journal of membrane science 2019 v.575 pp. 191-199
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; artificial membranes; atomic force microscopy; concrete; contact angle; ethanol; methanol; permeability; polyamides; polymerization; scanning electron microscopes; scanning electron microscopy; small-angle X-ray scattering; strength (mechanics)
Abstract:
... Preparation of novel swelling resistance membrane by interpenetrating an immiscible flexible polyisobutylene (PIB) polymer into a rigid polyamide (PA) network by interfacial polymerization. Due to the force interlocking of flexible PIB, polyamide network has high strength and excellent resistance to methanol. The PA layer was characterized by mechanical strength, attenuated total reflection fourie ...
DOI:
10.1016/j.memsci.2019.01.020

29. Ensemble Bayesian forecasting system Part II: Experiments and properties

Author:
Herr, Henry D.; Krzysztofowicz, Roman
Source:
Journal of hydrology 2019 v.575 pp. 1328-1344
ISSN:
0022-1694
Subject:
Bayesian theory; algorithms; hydrologic models; rivers; uncertainty
Abstract:
... A typical deficiency of ensemble forecasts is the lack of calibration; e.g., ensemble members are under-dispersed and, consequently, probabilities estimated from them cannot be taken at their face values. Self-calibration is one of the unique theoretic properties of the Bayesian forecasting system, BFS. Its ensemble version, EBFS, inherits this property, provided the ensemble size is large enough. ...
DOI:
10.1016/j.jhydrol.2019.02.057

30. Epoxy-Amine microgels-mediated green preparation of gold nanoparticles

Author:
Zheng, Yanan; Cheng, Fang; He, Wei
Source:
Colloids and surfaces 2019 v.575 pp. 94-101
ISSN:
0927-7757
Subject:
chemical reduction; heat; infrared spectroscopy; light scattering; microgels; moieties; nanogold; pH; stabilizers; storage quality; thermogravimetry; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... We demonstrate the applicability and versatility of recently developed epoxy-amine microgels toward the synthesis of gold nanoparticles through chemical reduction of tetrachloroauric (III) acid (HAuCl4). The reaction takes place in water under mild heating, and is free from extra reducing and stabilizing agents with both functions fulfilled by the amine groups of the microgels, making it a green p ...
DOI:
10.1016/j.colsurfa.2019.04.084

31. Esterification influence in thermosensitive behavior of copolymers PNIPAm-co-PAA and PNVCL-co-PAA in magnetic nanoparticles surface

Author:
Amantea, B.E.; Piazza, R.D.; Chacon, J.R.V; Santos, C.C.; Costa, T.P.; Rocha, C.O.; Brandt, J.V.; Godoi, D.R.M.; Jafelicci, M.; Marques, R.F.C.
Source:
Colloids and surfaces 2019 v.575 pp. 18-26
ISSN:
0927-7757
Subject:
acrylic acid; aqueous solutions; composite polymers; drug delivery systems; esterification; fever; heat; hydrophilicity; infrared spectroscopy; magnetic fields; magnetite; methotrexate; nanoparticles; neoplasms; polyacrylic acid; thermosensitivity
Abstract:
... The ability to generate heat from magnetic nanoparticle and the response of thermosensitive polymers poly(n-isopropylacrylamide) (PNIPAm) and poly(n-vinyl caprolactam) (PNVCL) are properties that have promoted several studies in controlled drug release systems. As the lower critical solution temperatures (LCST) of PNIPAm and PNVCL are between 32–35 °C and close to the temperature of the human body ...
DOI:
10.1016/j.colsurfa.2019.04.011

32. Extraction of plasmid DNA by use of a magnetic maghemite-polyaniline nanocomposite

Author:
da Silva, Romário Justino; Maciel, Bruna Gomes; Medina-Llamas, Juan Carlos; Chávez-Guajardo, Alicia Elizabeth; Alcaraz-Espinoza, José Jarib; Pinto de Melo, Celso
Source:
Analytical biochemistry 2019 v.575 pp. 27-35
ISSN:
0003-2697
Subject:
Escherichia coli; Fourier transform infrared spectroscopy; agar gel electrophoresis; aqueous solutions; emulsions; light scattering; magnetism; nanocomposites; plasmids; polymerase chain reaction; polymerization; polymers; scanning electron microscopy; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... We describe the use of a hybrid magnetic nanocomposite (HMNC) for the extraction and purification of plasmid DNA (pDNA) from Escherichia coli aqueous solutions. The HMNC, which was synthesized via emulsion polymerization, was characterized by transmission electron microscopy, scanning electron microscopy, UV–Vis spectroscopy, Fourier transform infrared spectroscopy, dynamic light scattering and ma ...
DOI:
10.1016/j.ab.2019.03.013

33. Fast LC-MS quantitation of glucose and glycerol via enzymatic derivatization

Author:
Chiles, Eric; Wang, Yujue; Kalemba, Katarzyna M.; Kwon, Hyokjoon; Wondisford, Fredric E.; Su, Xiaoyang
Source:
Analytical biochemistry 2019 v.575 pp. 40-43
ISSN:
0003-2697
Subject:
derivatization; glucose; glucose 6-phosphate; glycerol; ionization; isotope labeling; liquid chromatography; mass spectrometry; metabolism; metabolites; metabolomics; stable isotopes
Abstract:
... Glucose and glycerol are important circulating metabolites. Due to poor ionization and/or ion suppression, the liquid chromatography-mass spectrometry (LC-MS) detection of glucose and glycerol presents challenges. Here, we propose an efficient LC-MS method of quantitative glucose and glycerol detection via enzymatic derivatization to glucose-6-phosphate and sn-glycerol-3-phosphate, respectively. T ...
DOI:
10.1016/j.ab.2019.03.020

34. Field trial of spiral-wound facilitated transport membrane module for CO2 capture from flue gas

Author:
Han, Yang; Salim, Witopo; Chen, Kai K.; Wu, Dongzhu; Ho, W.S. Winston
Source:
Journal of membrane science 2019 v.575 pp. 242-251
ISSN:
0376-7388
Subject:
arsenic; artificial membranes; carbon; carbon dioxide; chromium; field experimentation; flue gas; nitrogen; selenium; temperature; Alabama
Abstract:
... A field trial with 1.4 m2 spiral-wound (SW) membrane modules fabricated from an amine-containing facilitated transport membrane was conducted with actual flue gas at the National Carbon Capture Center in Wilsonville, AL, U.S.A. Prior to the field test, the membrane modules were systematically evaluated with simulated flue gas to identify the optimal operating conditions, including feed flow rate, ...
DOI:
10.1016/j.memsci.2019.01.024

35. Gas permeation through single-crystal ZIF-8 membranes

Author:
Chen, Chen; Ozcan, Aydin; Yazaydin, A. Ozgur; Ladewig, Bradley P.
Source:
Journal of membrane science 2019 v.575 pp. 209-216
ISSN:
0376-7388
Subject:
artificial membranes; carbon dioxide; coordination polymers; mass transfer; methane; micropores; nitrogen; permeability; porous media; sorption isotherms; transmission electron microscopy
Abstract:
... Grain boundaries are an unavoidable microstructural feature in intergrown polycrystalline metal-organic framework (MOF) membranes. They have been suspected to be less size-selective than a MOF's micropores, resulting in suboptimal separation performances – a speculation recently confirmed by transmission electron microscopy of MOF ZIF-8. Single-crystal membranes, without grain boundaries, should c ...
DOI:
10.1016/j.memsci.2019.01.027

36. Graphene oxide Pickering phase change material emulsions with high thermal conductivity and photo-thermal performance for thermal energy management

Author:
Zhao, Qihang; Yang, Wenbin; Zhang, Hongping; He, Fangfang; Yan, Hongjian; He, Ren; Zhang, Kai; Fan, Jinghui
Source:
Colloids and surfaces 2019 v.575 pp. 42-49
ISSN:
0927-7757
Subject:
emulsions; graphene oxide; heat transfer; phase transition; rheological properties; stabilizers; thermal conductivity; thermal energy
Abstract:
... In this study, novel graphene oxide Pickering phase change material emulsions (GO Pickering PCMEs) containing 10 wt% of paraffin were prepared. GO was utilized as a Pickering stabilizer. The formation of GO Pickering PCMEs was successfully clarified via designing a contrast experiment. The effects of different GO concentrations on the morphology, rheological behavior, stability, thermal conductivi ...
DOI:
10.1016/j.colsurfa.2019.05.007

37. Hierarchically structured emulsions for brain therapy

Author:
Dluska, Ewa; Markowska-Radomska, Agnieszka; Metera, Agata; Kosicki, Konrad
Source:
Colloids and surfaces 2019 v.575 pp. 205-211
ISSN:
0927-7757
Subject:
adsorption; antibodies; brain; brain neoplasms; buffers; calorimetry; carboxymethylcellulose; drugs; emulsions; glioblastoma; heat; neoplasm cells; oil-water interface; oils; pH; phosphates; polymers; surface proteins; therapeutics; titration
Abstract:
... In this paper, we developed a doxorubicin-loaded double emulsion, with a specific pH-triggered drug release mechanism, and with functionalized drops’ surfaces as an effective drug (doxorubicin-DOX) delivery implant for brain tumor therapy. The functionalization of double emulsions with antibodies at oil-water interfaces was performed for targeting brain tumor cells - glioblastoma multiforme (GBM). ...
DOI:
10.1016/j.colsurfa.2019.04.095

38. High affinity of AS1411 toward copper; its application in a sensitive aptasensor for copper detection

Author:
Bahreyni, Amirhossein; Ramezani, Mohammad; Alibolandi, Mona; Hassanzadeh, Pirooz; Abnous, Khalil; Taghdisi, Seyed Mohammad
Source:
Analytical biochemistry 2019 v.575 pp. 1-9
ISSN:
0003-2697
Subject:
Alzheimer disease; DNA; aptasensors; blood serum; copper; diabetes mellitus; drug delivery systems; drugs; fluorescence; fluorescent dyes; hepatolenticular degeneration; ions; magnetism; neoplasm cells; oligonucleotides; patients; streptavidin
Abstract:
... AS1411 is a 26-mer G-rich DNA aptamer which has been broadly employed in the field of targeted drug delivery, due to its capability to bind to nucleolin protein on the surface of cancer cells. In this work, it has been shown for the first time that in addition to nucleolin, AS1411 aptamer could bind to copper ions (Cu2+) with high affinity and selectivity, affecting AS1411 usage in drug delivery s ...
DOI:
10.1016/j.ab.2019.03.016

39. iMotor-CNN: Identifying molecular functions of cytoskeleton motor proteins using 2D convolutional neural network via Chou's 5-step rule

Author:
Le, Nguyen Quoc Khanh; Yapp, Edward Kien Yee; Ou, Yu-Yen; Yeh, Hui-Yuan
Source:
Analytical biochemistry 2019 v.575 pp. 17-26
ISSN:
0003-2697
Subject:
cytoskeleton; dynein ATPase; human diseases; kidney diseases; kinesin; models; muscle contraction; myosin
Abstract:
... Motor proteins are the driving force behind muscle contraction and are responsible for the active transportation of most proteins and vesicles in the cytoplasm. There are three superfamilies of cytoskeletal motor proteins with various molecular functions and structures: dynein, kinesin, and myosin. The functional loss of a specific motor protein molecular function has linked to a variety of human ...
DOI:
10.1016/j.ab.2019.03.017

40. Influence of flow alterations on bacteria retention during microfiltration

Author:
Helling, Alexander; Grote, Christina; Büning, Dominic; Ulbricht, Mathias; Wessling, Matthias; Polakovic, Milan; Thom, Volkmar
Source:
Journal of membrane science 2019 v.575 pp. 147-159
ISSN:
0376-7388
Subject:
Gram-positive bacteria; Mycoplasma; artificial membranes; culture media; filters; microfiltration; models; pH; porosity; salt concentration; surfactants; temperature; turbidity; virion; viruses
Abstract:
... Microfiltration membranes retain bacteria predominantly by size-exclusion. However, some empirical data points towards the fact, that alterations in flow rate as well as changes in the quality of adhesive interactions between the membrane surface and the bacteria can affect their retention. For parvo virus retaining normal flow virus-filters, systematic investigations have been undertaken to chara ...
DOI:
10.1016/j.memsci.2019.01.021

41. In-situ growth of flower-like CuS microsphere on carbonized cotton for high-performance flexible supercapacitor

Author:
Zhai, Shixiong; Jin, Kaili; Zhou, Man; Fan, Zhuizhui; Zhao, Hong; Zhao, Yaping; Li, Xiaoyan; Cai, Zaisheng
Source:
Colloids and surfaces 2019 v.575 pp. 75-83
ISSN:
0927-7757
Subject:
active sites; capacitance; cotton; dispersibility; electrochemistry; electrodes; energy density; hot water treatment; microparticles; nanosheets; sulfides; synergism
Abstract:
... In this work, a composite electrode of flower-like copper sulphide (CuS) and carbonized cloth is prepared by one-step surfactant-free hydrothermal method simply. The reaction time has a great influence on the secondary structure of CuS, and the CuS nanosheet grown in situ on the carbonized cloth with lamellar structure possesses good dispersibility when the reaction time is 4h, which could provide ...
DOI:
10.1016/j.colsurfa.2019.05.010

42. In-situ preparation of iron(II) phthalocyanine modified bismuth oxybromide with enhanced visible-light photocatalytic activity and mechanism insight

Author:
Yin, Sheng; Chen, Yong; Hu, Qingsong; Li, Ming; Ding, Yi; Shao, Yifan; Di, Jun; Xia, Jiexiang; Li, Huaming
Source:
Colloids and surfaces 2019 v.575 pp. 336-345
ISSN:
0927-7757
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; absorption; bismuth; ciprofloxacin; electron paramagnetic resonance spectroscopy; free radicals; hydroxyl radicals; iron; irradiation; light; photocatalysis; photocatalysts; reflectance spectroscopy; superoxide anion; tetracycline; transmission electron microscopes
Abstract:
... High-efficiency interfacial separation of photoexcited electron-hole pairs and wide spectral response are the two major factors for photocatalytic performance improvement in a bismuth oxyhalide-based system. This research displayed a facile method to prepare an iron phthalocyanine/bismuth oxybromide (FePc/BiOBr) composite photocatalyst. The as-prepared sample was characterized by transmission elec ...
DOI:
10.1016/j.colsurfa.2019.05.028

43. Interaction between InP and SnO2 on TiO2 nanotubes for photoelectrocatalytic reduction of CO2

Author:
Zheng, Jingui; Hu, Fengyun; Han, Ershuan; Pan, Zhengbin; Zhang, Shuai; Li, Ya; Qin, Peiguang; Wang, Hui; Li, Peiqiang; Yin, Hongzong
Source:
Colloids and surfaces 2019 v.575 pp. 329-335
ISSN:
0927-7757
Subject:
carbon dioxide; electron transfer; energy; hot water treatment; methanol; nanotubes; photocatalysis; tin dioxide; titanium dioxide
Abstract:
... In this work, InP and SnO2 were assembled on TiO2 nanotubes (NTs) using a hydrothermal method with a different order to obtain InP/SnO2/TiO2 NTs and SnO2/InP/TiO2 NTs. The energy band gaps of SnO2/InP/TiO2 NTs (2.96 eV) is lower than that of InP/SnO2/TiO2 NTs (3.15 eV), And the net current densities of SnO2/InP/TiO2 NTs (1.1 mA cm−2) is higher than that of InP/SnO2/TiO2 NTs (0.27 mA cm−2) in photo ...
DOI:
10.1016/j.colsurfa.2019.05.016

44. Interfacial properties pertinent to W/O and O/W emulsion systems prepared using polyaromatic compounds

Author:
Niu, Zhen; Manica, Rogerio; Li, Zuoli; He, Xiao; Sjoblom, Johan; Xu, Zhenghe
Source:
Colloids and surfaces 2019 v.575 pp. 283-291
ISSN:
0927-7757
Subject:
emulsions; models; oils; petroleum; rheology; surface tension; viscoelasticity; xylene
Abstract:
... Establishing interfacial science to understand molecular mechanisms of stabilizing water in heavy crude oil (W/O) emulsions is challenging due to non-transparent nature of crude oil even in diluted systems, as most of the interfacial property measurements are based on visualization of the experimental systems. This study investigates whether interfacial properties measured using transparent O/W em ...
DOI:
10.1016/j.colsurfa.2019.05.011

45. Label-free carbon dots from black sesame seeds for real-time detection of ammonia vapor via optical electronic nose and density functional theory calculation

Author:
Supchocksoonthorn, Preeyanuch; Thongsai, Nichaphat; Moonmuang, Hataipat; Kladsomboon, Sumana; Jaiyong, Panichakorn; Paoprasert, Peerasak
Source:
Colloids and surfaces 2019 v.575 pp. 118-128
ISSN:
0927-7757
Subject:
absorbance; absorption; ambient temperature; ammonia; aqueous solutions; carbon quantum dots; density functional theory; detection limit; electronic nose; ethylenediamines; hot water treatment; methanol; sesame seed; solvents; triethylamine; vapors; volatile organic compounds
Abstract:
... Synthesis of carbon dots from natural precursors and their use in novel sensing applications currently gain much attention in the carbon dot research community because of its practicality and scaling-up possibility. Herein, carbon dots were synthesized from black sesame seeds via hydrothermal method and used as a dual-mode probe for the detection of ammonia in vapor and solution phases. The size o ...
DOI:
10.1016/j.colsurfa.2019.04.087

46. Lyotropic liquid crystal directed synthesis of anisotropic copper microparticles and their application in catalysis

Author:
Meyyathal, P.R.; Santhiya, N.; Umadevi, S.; Michelraj, S.; Ganesh, V.
Source:
Colloids and surfaces 2019 v.575 pp. 237-244
ISSN:
0927-7757
Subject:
ambient temperature; aminophenols; anisotropy; blood platelets; catalytic activity; copper; hydrazine; hydrogen peroxide; liquid crystals; microparticles; nonionic surfactants; p-nitrophenol; sodium borohydride; stabilizers
Abstract:
... A simple, room-temperature approach for the synthesis of stable microparticles of copper in a lyotropic liquid crystal (LLC) template is described. The LLC phase having a hexagonal ordering is prepared using a mixture of non-ionic surfactant triton-X 100 and water in the ratio of 40:60 wt%. A controlled growth of copper particles is achieved in this medium by reducing cupric chloride using hydrazi ...
DOI:
10.1016/j.colsurfa.2019.05.020

47. Magnetic textile with pH-responsive wettability for controllable oil/water separation

Author:
Yan, Tao; Zhang, Taiheng; Zhao, Guoqing; Zhang, Chongyang; Li, Caifeng; Jiao, Feipeng
Source:
Colloids and surfaces 2019 v.575 pp. 155-165
ISSN:
0927-7757
Subject:
fabrics; hydrophilicity; hydrophobicity; iron oxides; magnetic materials; magnetism; nanoparticles; oil spills; oils; pH; sewage; sustainable technology; temperature; titanium dioxide; wettability
Abstract:
... More and more attention has been paid to materials with special wettability for the potential application in oil/water separation and oil-spill treatment. In this work, we presented a simple, efficient, and environmentally friendly method to develop a magnetic textile that could achieve switchable wettability by changing the pH value of the surface. The textile was fabricated by a mixture of Fe3O4 ...
DOI:
10.1016/j.colsurfa.2019.04.083

48. Material properties of cocoa butter emulsions: Effect of dispersed phase droplet size and compression speed on mechanical response

Author:
di Bari, Vincenzo; Sullo, Antonio; Norton, Jennifer; Norton, Ian
Source:
Colloids and surfaces 2019 v.575 pp. 292-298
ISSN:
0927-7757
Subject:
cocoa butter; deformation; droplet size; droplets; emulsions; microscopy; strength (mechanics); viscoelasticity
Abstract:
... Water-in-cocoa butter (CB) emulsions material properties were investigated using uniaxial compression test. Emulsions containing 20% (wt%) water and with a range of droplet size were manufactured to assess the role of defect size on emulsions mechanical properties. Although differences were not significant within the tested droplet size range, results showed a decreasing trend in the values of mec ...
DOI:
10.1016/j.colsurfa.2019.04.028

49. Nano-array assisted metal-organic polyhedra membranes for the pervaporation of aromatic/aliphatic mixtures

Author:
Liu, Lu; Wang, Naixin; Liu, Hong-Xia; Shu, Lun; Xie, Ya-Bo; Li, Jian-Rong; An, Quan-Fu
Source:
Journal of membrane science 2019 v.575 pp. 1-8
ISSN:
0376-7388
Subject:
artificial membranes; benzene; ceramics; copper; nanosheets; permeability; pervaporation
Abstract:
... Metal-organic polyhedra (MOP), as a new type of molecule-based porous nanocage, is a promising material in membrane separation. However, it is a challenge to obtain pure MOP membrane to take full advantage of its nanocage. In this study, [Cu24(5-tBu-1,3-BDC)24(S)24] (MOP-tBu) membranes were prepared on the surface of ceramic tubular substrate with the assistance of Co(OH)2 nano-array. MOP-tBu mole ...
DOI:
10.1016/j.memsci.2018.12.081

50. New insights of foam flow dynamics in a high-complexity 2D micromodel

Author:
Yeates, Christopher; Youssef, Souhail; Lorenceau, Elise
Source:
Colloids and surfaces 2019 v.575 pp. 184-198
ISSN:
0927-7757
Subject:
bubbles; foams; hydrodynamics; image analysis; models; porous media
Abstract:
... In this work, we present direct observation of foam flow through a 2D porous microfluidic device. Through a specially designed image processing workflow, we perform individual bubble tracking and establish flow dynamics within the micromodel structure. In addition to our experimental data, we provide 2D and 3D numerical Newtonian flow simulations on equivalent digitized versions of the model, carr ...
DOI:
10.1016/j.colsurfa.2019.04.092

51. Nickel hollow fiber membranes for hydrogen separation from reformate gases and water gas shift reactions operated at high temperatures

Author:
Wang, Mingming; Zhou, Yalin; Tan, Xiaoyao; Gao, Jun; Liu, Shaomin
Source:
Journal of membrane science 2019 v.575 pp. 89-97
ISSN:
0376-7388
Subject:
alcohols; artificial membranes; carbon dioxide; carbon monoxide; coal; gasification; hydrocarbons; hydrogen; hydrogen production; hydrogen sulfide; microstructure; models; nickel; permeability; poisoning; spinning; temperature; thermal stability; vapors
Abstract:
... High temperature H2-selective membranes can be applied as the membrane reactor for pure hydrogen production by catalytic reforming of alcohols or hydrocarbons. Conventional Pd-based membranes are limited for this purpose due to the low thermal stability, significant hydrogen embrittlement, quick poisoning by other impurity species and high material cost. In this work, metallic nickel (Ni) hollow f ...
DOI:
10.1016/j.memsci.2019.01.009

52. NMR cryoporometry of polymers: Cross-linking, porosity and the importance of probe liquid

Author:
Rottreau, Taylor J.; Parkes, George E.; Schirru, Manuela; Harries, Josephine L.; Granollers Mesa, Marta; Topham, Paul D.; Evans, Rob
Source:
Colloids and surfaces 2019 v.575 pp. 256-263
ISSN:
0927-7757
Subject:
crosslinking; hydrogels; ion exchange; ion exchange resins; liquids; menthol; nuclear magnetic resonance spectroscopy; physicochemical properties; polymers; porosity; porous media
Abstract:
... The morphology of cross-linked polymers plays an important role in their physical and chemical properties. NMR cryoporometry allows for the investigation of these structures over different length scales, through appropriate choice of probe liquid. The different structures of two different polymeric samples, one a cross-linked polymer hydrogel, the other a pore-expanded ion-exchange polymer, are an ...
DOI:
10.1016/j.colsurfa.2019.05.018

53. Physicochemical properties of chimie douce derived, digestively ripened, ultra-small (r<2 nm) ZnO QDs

Author:
Talluri, Bhusankar; Thomas, Tiju
Source:
Colloids and surfaces 2019 v.575 pp. 310-317
ISSN:
0927-7757
Subject:
absorption; chemical interactions; coatings; electronic equipment; ligands; nanoparticles; oxygen; particle size; photocatalysis; photoluminescence; physicochemical properties; quantum dots; solvents; spectral analysis; surfactants; zeta potential; zinc oxide
Abstract:
... Ultra-small and uniform sized ZnO quantum dots (QDs) have been synthesized by using a chimie-douce, scalable and eco-friendly method. The physicochemical properties of digestively ripened ZnO QDs have been explored. Uniform sized colloidal QDs are achieved by employing a size control approach called digestive ripening (DR). In DR, monodispersed colloidal nanoparticles are obtained from polydispers ...
DOI:
10.1016/j.colsurfa.2019.05.026

54. Poly(ethylene oxide)-based composite polymer electrolytes embedding with ionic bond modified nanoparticles for all-solid-state lithium-ion battery

Author:
Hu, Ji; Wang, Wanhui; Zhou, Binghua; Feng, Yuezhan; Xie, Xiaolin; Xue, Zhigang
Source:
Journal of membrane science 2019 v.575 pp. 200-208
ISSN:
0376-7388
Subject:
artificial membranes; composite polymers; crosslinking; electrochemistry; electrolytes; iron phosphates; irradiation; lithium; lithium batteries; mixing; nanoparticles; polyethylene glycol; polymerization; silica; ultraviolet radiation
Abstract:
... Flexible composite polymer electrolytes (CPEs) are fabricated by reversible addition-fragmentation chain transfer (RAFT) polymerization of poly(ethylene glycol) methacrylate (PEGMA) and poly(ethylene glycol) diacrylate (PEGDA), followed by physical doping with ionic bond modified nanoparticles (IBNs) based on nanoscale silica. In reference to PEGMA-PEGDA cross-linked framework prepared by ultravio ...
DOI:
10.1016/j.memsci.2019.01.025

55. Ponceau S waste: Ponceau S staining for total protein normalization

Author:
Sander, Hannah; Wallace, Samantha; Plouse, Rachel; Tiwari, Shuchita; Gomes, Aldrin V.
Source:
Analytical biochemistry 2019 v.575 pp. 44-53
ISSN:
0003-2697
Subject:
Internet; Western blotting; acetic acid; gels; protein content; staining; trichloroacetic acid; wastes
Abstract:
... Normalization of Western blotting data is a critical step that is needed to reduce errors caused by unequal sample loading across lanes in a gel, inconsistent sample preparation, and variations due to experimental errors. Several papers have suggested that total protein normalization may be better than housekeeping protein normalization for Western blotting normalization. Ponceau S is the most com ...
DOI:
10.1016/j.ab.2019.03.010

56. Preparation of borate anions intercalated MgAl-LDHs microsphere and its calcinated product with superior adsorption performance for Congo red

Author:
Jia, Ya-Huan; Liu, Zhi-Hong
Source:
Colloids and surfaces 2019 v.575 pp. 373-381
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorbents; adsorption; aqueous solutions; borates; differential scanning calorimetry; dyes; equations; hydroxides; microparticles; models; nanosheets; pH; scanning electron microscopy; surface area; temperature; thermogravimetry; transmission electron microscopy; wastewater treatment
Abstract:
... In the present study, the borate anions intercalated MgAl-layered double hydroxides (B-LDHs) microsphere and its calcinated product (B-LDOs) have been prepared by precursor method and characterized by the XRD, FT-IR, XPS, TG-DSC, SEM and TEM. This microsphere with hierarchical porous nanostructure was assembled by nanosheets. The B-LDHs and B-LDOs samples have high specific surface area of 138.6 m ...
DOI:
10.1016/j.colsurfa.2019.05.032

57. Properties of polyvinyl chloride (PVC) ultrafiltration membrane improved by lignin: Hydrophilicity and antifouling

Author:
Yong, Ming; Zhang, Yuqing; Sun, Shuai; Liu, Wei
Source:
Journal of membrane science 2019 v.575 pp. 50-59
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; antifouling activities; artificial membranes; cleaning; contact angle; differential scanning calorimetry; heat; hydrophilicity; lignin; mass transfer; oils; permeability; poly(vinyl chloride); pulp and paper industry; scanning electron microscopy; sewage; ultrafiltration; wastewater
Abstract:
... Usually seen as a waste with low chemical value and limited commercial potential, lignin produced in large quantity from paper industry performs abundant valuable hydrophilic groups which make it a potential hydrophilic assistant. In this contribution, in order to improve hydrophilicity and antifouling properties of PVC ultrafiltration membrane, lignin was doped into PVC to prepare a uniform sol u ...
DOI:
10.1016/j.memsci.2019.01.005

58. Protein gating by vapor deposited Janus membranes

Author:
Tufani, Ali; Ozaydin Ince, Gozde
Source:
Journal of membrane science 2019 v.575 pp. 126-134
ISSN:
0376-7388
Subject:
artificial membranes; bovine serum albumin; coatings; models; pH; permeability; polymers; vapors
Abstract:
... Multi-functional Janus membranes, with opposing properties on each side, can act as on-off gates for controlled release, switchable permeation or directional transport of macromolecules. Janus membranes with poly (methylacrylic acid-co-ethylene glycol dimethacrylate), p(MAA-co-EGDMA), and poly (4-vinylpyridine-co-ethylene glycol dimethacrylate), p(4VP-co-EGDMA), polymer coatings on opposite sides ...
DOI:
10.1016/j.memsci.2019.01.013

59. Quantification of proteins in whole blood, plasma and DBS, with element-labelled antibody detection by ICP-MS

Author:
Hogeling, Shanna M.; Cox, Michael T.; Bradshaw, Robert M.; Smith, David P.; Duckett, Catherine J.
Source:
Analytical biochemistry 2019 v.575 pp. 10-16
ISSN:
0003-2697
Subject:
albumins; antibodies; antibody detection; blood serum; enzyme-linked immunosorbent assay; europium; immunoglobulin G; protein content
Abstract:
... Over recent years, quantification of multiple proteins in body fluids has become increasingly prominent, which is beneficial to a number of scientific fields, not least biomedical. Several techniques have been developed based on conventional ELISA; one of these techniques is analysis of proteins labelled with element-tagged antibodies by ICP-MS in serum, allowing quantification of multiple targets ...
DOI:
10.1016/j.ab.2019.03.006

60. Real time rheological study of first network effects on the in situ polymerized semi-interpenetrating hydrogels

Author:
Wu, Huiqiong; Lei, Yulai; Song, Xianwen; Tan, Yun; Sun, Zhifang; Zhang, Yi; Kjøniksen, Anna-Lena; Wang, Wei; Ma, Jianmin
Source:
Colloids and surfaces 2019 v.575 pp. 111-117
ISSN:
0927-7757
Subject:
acrylamides; chitosan; gelation; hydrogels; polymerization; polymers; rheological properties; rheology; strength (mechanics)
Abstract:
... The in situ polymerization of monomers to form a second network within a preexisting network (first network) is a facile and effective strategy to fabricate semi-interpenetrating (semi-IPN) hydrogels with enhanced mechanical strength; while to comprehend the effects of the first polymer network on the polymerization process of the second network is still a challenging project. This paper introduce ...
DOI:
10.1016/j.colsurfa.2019.05.002

61. Sensitive and facile colorimetric sensing strategy for ascorbic acid determination based on CoOOH nanoflakes-ABTs oxidative system

Author:
Fang, Xian; Wang, Jing; Cui, Xiaoqing; Zhang, Yuhua; Zhu, Ruifeng; Zhao, Hong; Li, Zengxi
Source:
Colloids and surfaces 2019 v.575 pp. 66-74
ISSN:
0927-7757
Subject:
absorbance; absorption; ascorbic acid; bioassays; color; colorimetry; detection limit; kiwifruit; oxidation; rapid methods; ultraviolet-visible spectroscopy
Abstract:
... Ascorbic acid (AA) is one of the most important vitamins and serves many physiological activities in the body. In this work, we propose a simple colorimetric sensor for the rapid detection of AA through the redox reaction between CoOOH nanoflakes and ascorbic acid with the 2, 2′-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) as a colorimetric signal indicator. CoOOH nanoflakes could catalyti ...
DOI:
10.1016/j.colsurfa.2019.05.009

62. Separation mechanisms of binary dye mixtures using a PVDF ultrafiltration membrane: Donnan effect and intermolecular interaction

Author:
Tran, Thi Tuong Van; Kumar, S. Rajesh; Lue, Shingjiang Jessie
Source:
Journal of membrane science 2019 v.575 pp. 38-49
ISSN:
0376-7388
Subject:
chemical interactions; filtrates; methylene blue; microporous membranes; permeability; rhodamines; thermoplastics; total organic carbon; ultrafiltration; zwitterions
Abstract:
... This study aimed to explore the separation behaviors of various organic dyes across an ultrafiltration membrane. Herein, a poly(vinylidene fluoride) (PVDF) layer was fabricated on a nonwoven support to form microporous membranes for separating dye solutions. Zwitterionic, cationic and anionic dyes in single and binary mixtures were tested for dye rejection, total organic carbon (TOC) rejection and ...
DOI:
10.1016/j.memsci.2018.12.070

63. Simulation and experimental study on the effect of abrasive size, rotational speed, and machining gap during ultra-precision polishing of monocrystalline silicon

Author:
Mosavat, Mohammad; Rahimi, Abdolreza
Source:
Colloids and surfaces 2019 v.575 pp. 50-56
ISSN:
0927-7757
Subject:
deformation; finishing; hydrodynamics; magnetism; models; silicon; surface roughness; wafers
Abstract:
... Monocrystalline silicon wafers are the key materials for micro-electro-mechanical-systems. These wafers require high surface quality with damage-free subsurface. Because of the high-speed deformation during the ultra-precision polishing of these wafers, Smoothed Particle Hydrodynamics (SPH) which is a meshless method with good self-adaptability can be useful in the simulation of the polishing proc ...
DOI:
10.1016/j.colsurfa.2019.05.005

64. Structure/function correlation of thixotropic additives based on three leaf-like triamide derivatives containing three alkyl-chains

Author:
Nakagawa, Yuto; Watahiki, Kaede; Okano, Rei; Satou, Eiichi; Shibasaki, Yuji; Fujimori, Atsuhiro
Source:
Colloids and surfaces 2019 v.575 pp. 27-41
ISSN:
0927-7757
Subject:
additives; carbon; gelation; gels; hydrogen bonding; moieties; nanofibers; optical isomerism; physical properties; solvents
Abstract:
... The effect of the solvent gelation ability of three leaf-like triamide derivatives, having three 12-hydroxystearyl or octadecyl chains, as thixotropic-induced additives was investigated. Furthermore, the clarification of origin of the physical properties of these compounds was carried out by monolayer investigation on the water surface. The solvent gels formed by the addition of these triamide com ...
DOI:
10.1016/j.colsurfa.2019.04.094

65. Superhydrophobic PVDF nanofibre membranes coated with an organic fouling resistant hydrophilic active layer for direct-contact membrane distillation

Author:
Nthunya, Lebea N.; Gutierrez, Leonardo; Khumalo, Nomcebo; Derese, Sebastiaan; Mamba, Bhekie B.; Verliefde, Arne R.; Mhlanga, Sabelo D.
Source:
Colloids and surfaces 2019 v.575 pp. 363-372
ISSN:
0927-7757
Subject:
adsorption; biofouling; bovine serum albumin; carbon nanotubes; carboxylation; cost effectiveness; distillation; hydrophilicity; hydrophobicity; mechanical properties; nanofibers; nanoparticles; nanosilver; silica; sodium chloride; thermophilic bacteria; water vapor
Abstract:
... Although Membrane Distillation (MD) is envisaged as a promising technology for achieving a cost-effective and sustainable recovery of water from saline solutions, membrane fouling and wetting remain the major challenges that compromise its separation efficiency. To mitigate the high fouling propensities of hydrophobic MD membranes while retaining their high salt rejection efficiencies, superhydrop ...
DOI:
10.1016/j.colsurfa.2019.05.031

66. Surface charging and points of zero charge of less common oxides: Beryllium oxide

Author:
Kosmulski, Marek; Mączka, Edward
Source:
Colloids and surfaces 2019 v.575 pp. 140-143
ISSN:
0927-7757
Subject:
adsorption; aluminum oxide; anionic surfactants; beryllium; cationic surfactants; cetyltrimethylammonium bromide; hematite; inorganic ions; isoelectric point; pH; particle size; phosphates; potassium chloride; potassium nitrate; sodium chloride; titanium dioxide; titration; zeta potential
Abstract:
... The surface charging and adsorption properties of beryllium oxide follow the same principles as the properties of other metal oxides.The point of zero charge PZC was determined by potentiometric titration, and by salt addition method at 15, 25 and 35 °C. The ζ potential of beryllium oxide was measured at different concentrations of various 1-1 salts. The effect of ionic surfactants and of multival ...
DOI:
10.1016/j.colsurfa.2019.05.024

67. Surface modification of polyethylene naphthalate substrates by ultraviolet light-irradiation and assembling multilayers and their application in electroless deposition: The chemical and physical properties of the stratified structure

Author:
Tamai, T.; Watanabe, M.; Kobayashi, Y.; Kobata, J.; Nakahara, Y.; Yajima, S.
Source:
Colloids and surfaces 2019 v.575 pp. 230-236
ISSN:
0927-7757
Subject:
X-ray photoelectron spectroscopy; adhesion; contact angle; copper; crosslinking; electrolytes; nickel; polyethylene; ultraviolet radiation
Abstract:
... Electroless metal deposition on polymer surface is useful for fabricating metallic patterns. The surfaces of polyethylene naphthalate (PEN) substrates were modified by ultraviolet (UV) light -irradiation and layer-by-layer assembly of polyelectrolyte multilayer thin films, and then nickel and copper films were electrolessly deposited on the substrate surfaces to form the stratified structure, PEN- ...
DOI:
10.1016/j.colsurfa.2019.05.017

68. Surface properties and premicellar aggregation behavior of cationic gemini surfactants with mono- and di-(2-hydroxypropyl)ammonium head groups

Author:
Asadov, Ziyafaddin H.; Ahmadova, Gulnara A.; Rahimov, Ravan A.; Hashimzade, Seyid-Zeynab F.; Nasibova, Shafiga M.; Ismailov, Etibar H.; Suleymanova, Samira A.; Muradova, Sevda A.; Asadova, Nahida Z.; Zubkov, Fedor I.
Source:
Colloids and surfaces 2019 v.575 pp. 212-221
ISSN:
0927-7757
Subject:
ammonium; antimicrobial properties; electrical conductivity; light scattering; micelles; moieties; surface tension; surfactants; tensiometers
Abstract:
... Novel cationic gemini surfactants - pentanediyl-1,5-bis[mono(2-hydroxypropyl) alkylammonium] dibromide and pentanediyl-1,5-bis[di(2-hydroxypropyl) alkylammonium] dibromide {in the abbreviation form - CnC5Cn[iso-Pr(OH)] and CnC5Cn[iso-Pr(OH)]2; alkyl - CnH2n+1 with n = 8, 9, 12 and 16} were synthesized. Surface tension, electroconductivity and dynamic light scattering methods were applied to study ...
DOI:
10.1016/j.colsurfa.2019.05.019

69. Surface properties of binary TiO2 - SiO2 nanoparticle dispersions relevant for foams stabilization

Author:
Llamas, Sara; Ponce Torres, Alberto; Liggieri, Libero; Santini, Eva; Ravera, Francesca
Source:
Colloids and surfaces 2019 v.575 pp. 299-309
ISSN:
0927-7757
Subject:
adsorption; air; cationic surfactants; cetyltrimethylammonium bromide; dispersions; foams; liquid-air interface; liquids; nanoparticles; rheology; silica; surface tension; titanium dioxide
Abstract:
... This work focuses on the surface properties of binary dispersions of nanoparticles, namely Titania (TiO2) and amorphous silica (SiO2), associated to a short chain ionic surfactant (CTAB) which has the role of modifying their amphiphilicity, inducing the segregation of particle-surfactant complexes at the liquid interface. The foams produced by these dispersions are also investigated. The adsorptio ...
DOI:
10.1016/j.colsurfa.2019.05.023

70. Synthesis and characterization of AgO/g-C3N4 hybrids with enhanced visible-light photocatalytic activity for Rhodamine B degradation and bactericidal inactivation

Author:
Shen, Wenning; Wang, Xu; Ge, Yanfeng; Feng, Hui; Feng, Lajun
Source:
Colloids and surfaces 2019 v.575 pp. 102-110
ISSN:
0927-7757
Subject:
absorption; antibacterial properties; carbon nitride; irradiation; light; nanoparticles; photocatalysis; rhodamines
Abstract:
... The AgO/g-C3N4 hybrids were prepared by growing and anchoring AgO nanoparticles on the surface of g-C3N4. The results demonstrated that AgO nanoparticles were well-dispersed on the surface of g-C3N4 and AgO/g-C3N4 hybrids were formed. Compared with bulk g-C3N4, the hybrids with narrow bandgap could adsorb visible light effectively. Additionally, the hybrids exhibited improved photocatalytic activi ...
DOI:
10.1016/j.colsurfa.2019.05.001

71. Synthesis of sphere-like polyelectrolyte complexes and their homogeneous membranes for enhanced pervaporation performances in ethanol dehydration

Author:
Tong, Ziqiang; Liu, Xiufeng; Zhang, Baoquan
Source:
Journal of membrane science 2019 v.575 pp. 9-16
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; artificial membranes; carboxymethylcellulose; circular dichroism spectroscopy; contact angle; electrolytes; ethanol; hydrophilicity; permeability; pervaporation; quaternary ammonium compounds; scanning electron microscopy; water content
Abstract:
... A series of sphere-like polyelectrolyte complexes (PECs) and their homogeneous polyelectrolyte complex membranes (HPECMs) were synthesized by using sodium carboxymethyl cellulose (CMCNa) and poly(diallyldimethylammonium chloride) (PDDA). Different compositions or ionic complexation degrees (ICD) of PECs could be characterized by FT-IR spectra. The circular dichroism spectrum (CD) and field emissio ...
DOI:
10.1016/j.memsci.2019.01.001

72. Systematically quantifying oil–water microemulsion structures using (spin-echo) small angle neutron scattering

Author:
Mulder, Maarten; Li, Xuesong X.; Nazim, Mohammad M.; Dalgliesh, Robert M.; Tian, Bei; Buijse, Marten; van Wunnik, John; Bouwman, Wim G.
Source:
Colloids and surfaces 2019 v.575 pp. 166-175
ISSN:
0927-7757
Subject:
alkanes; butanol; carbon; deuterium oxide; droplets; emulsions; models; neutron diffraction; olefin; salt content; sulfonates; surfactants
Abstract:
... Microemulsion systems consisting of D2O, an alkane, an anionic internal olefin sulfonate surfactant, salt and secondary butyl alcohol (SBA) as co-solvent are studied in a systematic way. In four different sample sets, either the salt content, SBA content or alkane carbon number was varied in order to study the effects of the individual compounds on the structure sizes making up the microemulsion. ...
DOI:
10.1016/j.colsurfa.2019.04.045

73. The comparison of imidazolium Gemini surfactant [C14-4-C14im]Br2 and its corresponding monomer as corrosion inhibitors for A3 carbon steel in hydrochloric acid solutions: Experimental and quantum chemical studies

Author:
Zhou, Ting; Yuan, Jing; Zhang, Zhiqing; Xin, Xia; Xu, Guiying
Source:
Colloids and surfaces 2019 v.575 pp. 57-65
ISSN:
0927-7757
Subject:
Gibbs free energy; adsorption; bromine; carbon; corrosion; dielectric spectroscopy; endothermy; enthalpy; heat production; hydrochloric acid; imidazoles; quantum mechanics; sorption isotherms; steel; surfactants; temperature; weight loss
Abstract:
... The inhibitory behaviors of imidazolium Gemini surfactant ([C14-4-C14im]Br2) on A3 carbon steel in HCl solutions, which is compared with its corresponding monomer ([C14mim]Br), have been investigated using electrochemical impedance spectroscopy (EIS), polarization curves, weight loss measurement and the quantum chemical study. Results reveal that the corrosion inhibition efficiency (IE) of [C14-4- ...
DOI:
10.1016/j.colsurfa.2019.05.004

74. The nature of two transition times on chronopotentiograms of heterogeneous ion exchange membranes: 2D modelling

Author:
Mareev, Semyon A.; Nebavskiy, Andrey V.; Nichka, Vladlen S.; Urtenov, Mahamet Kh.; Nikonenko, Victor V.
Source:
Journal of membrane science 2019 v.575 pp. 179-190
ISSN:
0376-7388
Subject:
electrochemistry; electrodialysis; ion-exchange membranes; ions; mathematical models; mixing
Abstract:
... Chronopotentiometry is largely used for electrochemical characterization of ion-exchange membranes. Nevertheless, the theory is poorly developed in the range of overlimiting currents. This paper proposes a two dimensional convective-diffusion model of ion transport in electromembrane system in galvanostatic mode. We use direct numerical simulation taking into account electroconvection to develop a ...
DOI:
10.1016/j.memsci.2018.12.087

75. Thermally stable cross-linked P84 with superior membrane H2/CO2 separation properties at 100 °C

Author:
Omidvar, Maryam; Stafford, Christopher M.; Lin, Haiqing
Source:
Journal of membrane science 2019 v.575 pp. 118-125
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; artificial membranes; carbon dioxide; crosslinking; diamines; differential scanning calorimetry; hydrogen; models; permeability; polymers; temperature; thermal stability; thermogravimetry
Abstract:
... Polymers with a strong size-sieving ability and superior H2/CO2 selectivity at 100 °C or above are of great interests for pre-combustion CO2 capture. Polyimides (such as Matrimid and 6FDA-durene) have been cross-linked using diamines and show superior H2/CO2 selectivity. However, these cross-linked polymers cannot be used for the pre-combustion CO2 capture because of the lack of thermal stability ...
DOI:
10.1016/j.memsci.2019.01.003

76. Thermo-sensitive micelles based on amphiphilic poly(butylene 2-methylsuccinate)-poly(ethylene glycol) multi-block copolyesters as the pesticide carriers

Author:
Han, Jiarui; Weng, Yunxuan; Xu, Jun; Guo, Baohua
Source:
Colloids and surfaces 2019 v.575 pp. 84-93
ISSN:
0927-7757
Subject:
avermectins; biodegradability; catalysts; condensation reactions; dialysis; drug carriers; drugs; esterification; high performance liquid chromatography; hydrophobicity; micelles; pesticides; polyesters; polyethylene glycol; temperature; thermosensitivity
Abstract:
... A novel bio-based and biodegradable aliphatic multi-block copolyester, poly(butylene 2-methylsuccinate)-poly(ethylene glycol) (PBMS-PEG), was synthesized from 1,4-butanediol (BDO), 2-methylsuccinate acid (MSA) and poly(ethylene glycol) (PEG) via direct esterification and polycondensation process with tetrabutyl titanate as catalyst. Thermo-sensitive PBMS-PEG micelles were obtained by self-assembly ...
DOI:
10.1016/j.colsurfa.2019.04.057

77. Tunable and switchable soft adsorption of polymer-coated microparticles on a flat substrate

Author:
Boniello, Giuseppe; Tribet, Christophe; Marie, Emmanuelle; Croquette, Vincent; Zanchi, Dražen
Source:
Colloids and surfaces 2019 v.575 pp. 199-204
ISSN:
0927-7757
Subject:
adhesion; adsorption; ambient temperature; colloids; crossing; desorption; diffusivity; lighting; microparticles; microscopy; mole fraction; phase transition; polymers; rolling
Abstract:
... Soft adhesion to a horizontal flat substrate of micron-sized colloids coated by a controlled molar fraction f of PLL-g-PNIPAM is tuned and triggered by controlling the temperature of the sample. This mechanism is possible because PNIPAM is a thermo-responsive polymer, which undergoes a phase transition at a LCST (lower critical solution temperature) Tc=32±1°C. In order to capture the very final ev ...
DOI:
10.1016/j.colsurfa.2019.04.081

78. Turbulent jet-assisted microfiltration for energy efficient harvesting of microalgae

Author:
Kim, Donghyun; Kwak, Minsoo; Kim, Kyochan; Chang, Yong Keun
Source:
Journal of membrane science 2019 v.575 pp. 170-178
ISSN:
0376-7388
Subject:
artificial membranes; energy efficiency; energy use and consumption; fluid mechanics; fouling; harvesting; microalgae; microfiltration; shear stress; specific energy
Abstract:
... For energy-efficient harvesting of microalgae using a hollow fiber membrane, a turbulent jet was implemented to induce local high crossflow velocity near the membrane surface for fouling reduction during microfiltration. The performance of the turbulent jet-assisted module was evaluated and compared to that of a control group that represented other types of flow conditions including the convention ...
DOI:
10.1016/j.memsci.2018.12.069

79. Volatile fatty acids concentration in real wastewater by forward osmosis

Author:
Blandin, Gaetan; Rosselló, Bàrbara; Monsalvo, Victor M.; Batlle-Vilanova, Pau; Viñas, Jose M.; Rogalla, Frank; Comas, Joaquim
Source:
Journal of membrane science 2019 v.575 pp. 60-70
ISSN:
0376-7388
Subject:
acetic acid; air; artificial membranes; biodegradation; desalination; fatty acid composition; fouling; microfiltration; osmosis; pH; permeability; seawater; volatile fatty acids; wastewater
Abstract:
... Forward osmosis (FO) was studied as a concentration step for volatile fatty acids (VFA, especially acetic acid) to optimise downstream microbial desalination cell (MDC). First, it was demonstrated that water concentration factor (WCF) of wastewater (WW) above 10 (15–30) is achievable with seawater or brine as draw solution and similar flow for feed and draw solution. It was also observed that VFA ...
DOI:
10.1016/j.memsci.2019.01.006