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1. Biodegradable Polymer Blends Based on Thermoplastic Starch

Author:
Vesna Ocelić Bulatović; Vilko Mandić; Dajana Kučić Grgić; Antonio Ivančić
Source:
Journal of polymers and the environment 2021 v.29 no.2 pp. 492-508
ISSN:
1566-2543
Subject:
biodegradability; biodegradation; contact angle; cost effectiveness; economic sustainability; environment; lead; mixing; polyesters; polylactic acid; starch; thermoplastics; water uptake
Abstract:
... This work considered the utilisation of environmentally friendly biodegradable materials instead of conventional polymeric materials, in order to prevent further environmental endangerment by accumulation of non-biodegradable materials. Thermoplastic starch (TPS) is an exemplary environmentally friendly biodegradable material. Blending TPS with other biodegradable polymers such as biodegradable po ...
DOI:
10.1007/s10924-020-01874-w

2. The effects of polymer modified asphalt binder incorporating with chemical warm mix additive towards water quality degradation

Author:
Suzielah Rahmad; Nur Izzi Md Yusoff; Syazwani Mohd Fadzil; Khairiah Haji Badri; Ahmad Kamil Arshad; Iswandaru Widyatmoko; Sri Atmaja P. Rosyidi
Source:
Journal of cleaner production 2021 v.279 pp. 123698
ISSN:
0959-6526
Subject:
additives; air pollution; atomic absorption spectrometry; binding agents; bitumen; chemical reactions; chromium; contact angle; copper; durability; environmental impact; graphs; heavy metals; hydrophilicity; hydrophobicity; iron; leaching; lead; mixing; nickel; polymers; rain; temperature; thermogravimetry; toxicity; water pollution; water quality; water resources; zinc
Abstract:
... Naturally, asphalt binder has compacting and mixing temperatures higher than 150 °C. Both temperatures can be increased by modifying the pristine penetration grade asphalt binder with polymer. However, the warm-mix asphalt (WMA) technology contributes to lowering of these temperatures even though the possibility of environmental effect cannot be neglected. Air pollution and water contamination are ...
DOI:
10.1016/j.jclepro.2020.123698

3. A molecular to macro level assessment of direct contact membrane distillation for separating organics from water

Author:
Sreekiran Pillai; Adriano Santana; Ratul Das; Buddha R. Shrestha; Edelberto Manalastas; Himanshu Mishra
Source:
Journal of membrane science 2020 v.608 pp. 118140
ISSN:
0376-7388
Subject:
adsorption; air; artificial membranes; coatings; contact angle; distillation; ethanol; fermentation; fouling; heat treatment; hydrophobicity; mica; mixing; molecular dynamics; perfluorocarbons; simulation models; sodium chloride; wastewater treatment; water reservoirs; water solubility; water vapor
Abstract:
... The removal of water-soluble organics from aqueous feeds is required in numerous practical applications, including bioresource processing, fermentation, and wastewater treatment. To this end, direct contact membrane distillation (DCMD) has been proposed as a separation technology. DCMD utilizes hydrophobic membranes – typically, comprising perfluorocarbons – which, when placed between a warm feed ...
DOI:
10.1016/j.memsci.2020.118140

4. An integrated electrocoagulation–nanofiltration process for carwash wastewater reuse

Author:
Z. Beril Gönder; Gökhan Balcıoğlu; Ilda Vergili; Yasemin Kaya
Source:
Chemosphere 2020 v.253 pp. 126713
ISSN:
0045-6535
Subject:
Fourier transform infrared spectroscopy; chlorides; contact angle; electrodes; energy; fouling; iron; mixing; pollutants; sludge; temperature; wastewater; water hardness; water reuse
Abstract:
... In the present work, advanced treatment of carwash wastewater with an integrated electrocoagulation–nanofiltration (EC–NF) process to reuse the treated wastewater as rinsing water was investigated. The wastewater was pretreated by EC process under various operating parameters such as temperature (25 °C, 35 °C, 45 °C), stirring speed (150 rpm, 250 rpm, 350 rpm), and electrode connection mode (MP-P, ...
DOI:
10.1016/j.chemosphere.2020.126713

5. Antibacterial chitosan electrostatic/covalent coating onto biodegradable poly (l-lactic acid)

Author:
Jon Andrade-Del Olmo; Leyre Pérez-Álvarez; Leire Ruiz-Rubio; José Luis Vilas-Vilela
Source:
Food hydrocolloids 2020 v.105 pp. 105835
ISSN:
0268-005X
Subject:
Escherichia coli; X-ray photoelectron spectroscopy; active food packaging; antibacterial properties; atomic force microscopy; bacteria; biodegradability; biopolymers; chitosan; coatings; contact angle; crosslinking; death; electrostatic interactions; fluorescence microscopy; hydrocolloids; mixing; molecular weight; nanoparticles; packing houses; polylactic acid; ultraviolet-visible spectroscopy; zinc oxide
Abstract:
... Biodegradable, non-toxic and transparent poly (l-lactic acid) (PLLA) biopolymer is modified in order to obtain an improved material with antibacterial properties for its use as active packaging of food. For this, PLLA films were endowed with the bactericidal effect of ZnO nanoparticles by internal blending and the bacteria contact-killing properties of the biopolymer chitosan (CHI) by superficial ...
DOI:
10.1016/j.foodhyd.2020.105835

6. Blending of phthalated starch and surface functionalized rice husk extracted nanosilica with LDPE towards developing an efficient packaging substitute

Author:
Deepshikha Datta; Gopinath Halder
Source:
Environmental science and pollution research international 2020 v.27 no.2 pp. 1533-1557
ISSN:
0944-1344
Subject:
adhesion; biodegradability; biodegradation; contact angle; gardens; horticultural soils; hydrophobicity; mechanical properties; mixing; nanomaterials; packaging; particle size; phthalates; polyethylene; rice hulls; silica; starch; surface area; transmittance; vegetable residues; weight loss
Abstract:
... Starch was transformed to hydrophobic starch phthalate (contact angle 109°) in order to achieve a good dispersion in LDPE matrix. Nanosilica derived from rice husk after aminopropyltrimethoxysilane functionalization was also incorporated into the blend as property-enhancing filler. The produced crystalline starch phthalate had a lower particle size of 9.87 μm and a higher surface area of 2.87 m²/g ...
DOI:
10.1007/s11356-019-06430-1

7. Effect of Adjuvant on Glyphosate Effectiveness, Retention, Absorption and Translocation in Lolium rigidum and Conyza canadensis

Author:
Candelario Palma-Bautista; Jose G. Vazquez-Garcia; Ilias Travlos; Alexandros Tataridas; Panagiotis Kanatas; José A. Domínguez-Valenzuela; Rafael De Prado
Source:
Plants 2020 v.9 no.3 pp. -
ISSN:
2223-7747
Subject:
Conyza canadensis; Lolium rigidum; absorption; adjuvants; contact angle; crops; glyphosate; greenhouses; leaves; mixing; weeds; Mediterranean region
Abstract:
... Glyphosate retention, absorption and translocation with and without adjuvant were examined in Lolium rigidum and Conyza canadensis in greenhouse and laboratory settings to develop an understanding of the influence of the selected adjuvant on glyphosate activity. Tests on whole plants show that the dose of herbicide needed to reduce dry weight by 50% (GR50) or plant surviva ...
DOI:
10.3390/plants9030297

8. Effective recovery of oil slick using the prepared high hydrophobic and oleophilic Fe3O4 magnetorheological fluid

Author:
Feng Tian; Jian-feng Zhou; Chun-lei Shao; Hong-bo Wu; Liang Hao
Source:
Colloids and surfaces 2020 v.591 pp. 124531
ISSN:
0927-7757
Subject:
X-ray diffraction; chemical precipitation; contact angle; hydrophobicity; iron oxides; lipid content; lubrication; magnetic materials; magnetism; mixing; nanoparticles; oil spills; oils; oleic acid; scanning electron microscopy; surfactants; thermogravimetry; transmission electron microscopy; ultrasonics; vibration; wastewater; wastewater treatment
Abstract:
... Magnetorheological fluids (MRFs) have the excellent comprehensive properties and have widespread applications in lubrication, sealing, vibration reduction and wastewater treatment. When MRFs are used to recover oil from water, the Fe₃O₄ magnetic nanoparticles (MPs) in MRF are coated by a surfactant which has good hydrophobic and oleophilic properties. After the surfactant fully adsorbs the oil in ...
DOI:
10.1016/j.colsurfa.2020.124531

9. Ethaline deep eutectic solvent as a hydrophilic additive in modification of polyethersulfone membrane for antifouling and separation improvement

Author:
Vahid Vatanpour; Ahmad Dehqan; Ali Reza Harifi-Mood
Source:
Journal of membrane science 2020 v.614 pp. 118528
ISSN:
0376-7388
Subject:
antifouling activities; artificial membranes; atomic force microscopy; bovine serum albumin; choline chloride; contact angle; dyes; ethylene glycol; hydrophilicity; infrared spectroscopy; mixing; nanofiltration; polyvinylpyrrolidone; scanning electron microscopes; scanning electron microscopy; separation; solvents; strength (mechanics)
Abstract:
... In this research, fabricating and modifying of polyethersulfone (PES) nanofiltration membrane were reported by using deep eutectic solvents (DESs) as a novel modifier for the membranes. The applied DES was produced by mixing ethylene glycol (EG) and choline chloride (ChCl). It is commonly known as ethaline. Ethaline was exploited as a hydrophilic additive into casting solution to formulate a novel ...
DOI:
10.1016/j.memsci.2020.118528

10. Fabrication and characterization of graphene oxide–polyethersulfone (GO–PES) composite flat sheet and hollow fiber membranes for oil–water separation

Author:
Nurul Fatin Diana Junaidi; Nur Hidayati Othman; Munawar Zaman Shahruddin; Nur Hashimah Alias; Fauziah Marpani; Woei Jye Lau; Ahmad Fauzi Ismail
Source:
Journal of chemical technology and biotechnology 2020 v.95 no.5 pp. 1308-1320
ISSN:
0268-2575
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; asymmetric membranes; contact angle; droplets; fouling; graphene oxide; hydrophilicity; mixing; oils; permeability; porosity; scanning electron microscopy; thermogravimetry
Abstract:
... BACKGROUND: In this work, a series of graphene oxide–polyethersulfone (GO–PES) composite flat sheet (FS) and hollow fiber (HF) membranes were fabricated by blending 0.5 and 1.0 wt% of GO into the PES matrix and utilized for oil–water separation. GO was first prepared and characterized by using Fourier‐transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), X‐ray diffraction (XR ...
DOI:
10.1002/jctb.6366

11. Fabrication of high performance TFN membrane containing NH₂-SWCNTs via interfacial regulation

Author:
Qing Kong; Hang Xu; ChenWei Liu; Guang Yang; Mingmei Ding; Wen Yang; Tao Lin; Wei Chen; Stephen Gray; Zongli Xie
Source:
RSC advances 2020 v.10 no.42 pp. 25186-25199
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; atomic force microscopy; carbon nanotubes; contact angle; films (materials); hydrophilicity; magnesium sulfate; mixing; nanocomposites; nanofiltration; permeability; piperazine; polyamides; polymerization; roughness; sodium sulfate; zeta potential
Abstract:
... A high-flux thin film nanocomposite (TFN) nanofiltration (NF) membrane for low pressure operation (3.5 bar) was fabricated by blending purified amino-functionalized single-walled carbon nanotubes (NH₂-SWCNTs) with piperazine (PIP) as aqueous phase monomers through interfacial polymerization (IP). The surface properties and structures of the polyamide (PA) active layer were suitably tailored by int ...
DOI:
10.1039/d0ra02947e

12. Facile Approach for Ecofriendly, Low-Cost, and Water-Resistant Paper Coatings via Palm Kernel Oil

Author:
Kexin Zeng; Juan Gu; Changyong Cao
Source:
ACS applied materials & interfaces 2020 v.12 no.16 pp. 18987-18996
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy; biodegradability; coatings; contact angle; cost effectiveness; furfuryl alcohol; gravimetry; hydrophobicity; liquids; mechanical properties; microstructure; mixing; packaging; palm kernel oil; paper; petroleum; solvents; thermogravimetry; water vapor
Abstract:
... Paper-based packaging is widely employed in industries ranging from food to beverages to pharmaceuticals because of its attractive advantages of biodegradability, recyclability, good strength, low cost, and lightweight. However, paper products usually have poor water barrier resistance properties because of paper and fibers porous microstructure. In this study, an ecofriendly water-resistant (hydr ...
DOI:
10.1021/acsami.0c00067

13. Green nanocomposite made with chitin and bamboo nanofibers and its mechanical, thermal and biodegradable properties for food packaging

Author:
LeVan Hai; Eun Sik Choi; Lindong Zhai; Pooja S. Panicker; Jaehwan Kim
Source:
International journal of biological macromolecules 2020 v.144 pp. 491-499
ISSN:
0141-8130
Subject:
bamboos; biocompatibility; biodegradability; cellulose; cellulose nanofibers; chemical interactions; chitin; contact angle; food packaging; mixing; modulus of elasticity; nanocomposites; raw materials; tensile strength; thermal stability
Abstract:
... This paper reports a green nanocomposite made by simply blending chitin nanofibers and bamboo cellulose nanofibers without chemically dissolving chitin and cellulose raw materials. Good biodegradability and biocompatibility of chitin in conjunction with good mechanical properties of cellulose are beneficial for developing green nanocomposite applicable for food packaging. The bamboo cellulose nano ...
DOI:
10.1016/j.ijbiomac.2019.12.124

14. Hydrophobic deep eutectic solvents as extractants for the determination of bisphenols from food-contacted plastics by high performance liquid chromatography with fluorescence detection

Author:
Tiemei Li; Yuefei Song; Zhaoqi Dong; Yueyue Shi; Jing Fan
Source:
Journal of chromatography 2020 v.1621 pp. 461087
ISSN:
0021-9673
Subject:
ammonium chloride; butanes; chemical species; contact angle; decanoic acid; detection limit; fluorescence; gemfibrozil; high performance liquid chromatography; hydrogen bonding; hydrophobicity; ketoprofen; liquid-phase microextraction; melting point; mixing; models; plastics; propane; quantitative analysis; quaternary ammonium compounds; solvents; viscosity; volatile organic compounds; water pollution
Abstract:
... As a new kind of green solvents for potential replacement of traditional volatile organic compounds, deep eutectic solvents (DESs) have been attracting more and more attention in various applications. In this work, three types of hydrophobic DESs were synthesized by simple mixing of trioctylmethyl ammonium chloride (used as hydrogen bond acceptor) with decanoic acid, ketoprofen and gemfibrozil (hy ...
DOI:
10.1016/j.chroma.2020.461087

15. Optimization of low-energy Pickering nanoemulsion stabilized with montmorillonite and nonionic surfactants

Author:
Zeyu Yang; Wanxu Wang; Guoyong Wang; Xiumei Tai
Source:
Colloids and surfaces 2020 v.585 pp. 124098
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; contact angle; emulsifiers; light scattering; mixing; montmorillonite; nanoemulsions; nonionic surfactants; oils; particle size distribution; scanning electron microscopy; transmission electron microscopy; vitamin E
Abstract:
... Nanoemulsions have been widely studied and used in food, medicine, cosmetics and other industries. However, there are few studies on nanoemulsions stabilized with solid particles. In this work, water-in-oil nanoemulsions were prepared with stearyltrimethylammoniumchloride modified montmorillonite (STAC/MMT) and nonionic surfactants using low-energy method. STAC/MMT was characterized by FT-IR, XRD, ...
DOI:
10.1016/j.colsurfa.2019.124098

16. Organophilicity of Graphene Oxide for Enhanced Wettability of ZnO Nanorods

Author:
Pavan S. Emani; Hisham A. Maddah; Arjun Rangoonwala; Songwei Che; Aditya Prajapati; Meenesh R. Singh; Dieter M. Gruen; Vikas Berry; Sanjay K. Behura
Source:
ACS applied materials & interfaces 2020 v.12 no.35 pp. 39772-39780
ISSN:
1944-8252
Subject:
adhesion; adsorption; biosensors; blood platelets; contact angle; electronic equipment; ethanol; free radicals; graphene oxide; hydrophobicity; mixing; nanorods; pH; photocatalysis; solar energy; wettability; zinc oxide
Abstract:
... Interfacing two-dimensional graphene oxide (GO) platelets with one-dimensional zinc oxide nanorods (ZnO) would create mixed-dimensional heterostructures suitable for modern optoelectronic devices. However, there remains a lack in understanding of interfacial chemistry and wettability in GO-coated ZnO nanorods heterostructures. Here, we propose a hydroxyl-based dissociation-exchange mechanism to un ...
DOI:
10.1021/acsami.0c09559

17. PVDF mixed matrix ultrafiltration membrane incorporated with deformed rebar-like Fe3O4–palygorskite nanocomposites to enhance strength and antifouling properties

Author:
Jiayun Zhu; Shouyong Zhou; Meisheng Li; Ailian Xue; Yijiang Zhao; Wenbo Peng; Weihong Xing
Source:
Journal of membrane science 2020 v.612 pp. 118467
ISSN:
0376-7388
Subject:
antifouling activities; artificial membranes; contact angle; coprecipitation; hydrophilicity; iron oxides; mixing; nanocomposites; nanofibers; nanoparticles; palygorskite; permeability; porosity; surface roughness; tensile strength; thermal stability; thermoplastics; ultrafiltration
Abstract:
... A novel PVDF mixed matrix ultrafiltration membrane was prepared by blending PVDF with the deformed rebar-like Fe₃O₄–palygorskite nanocomposites (MPGS) using the chemical coprecipitation method. Fe₃O₄ nanoparticles were anchored on the surface of the palygorskite nanofibers to form deformed rebar-like structures. MPGS were then distributed uniformly on the membrane matrix. PVDF chains firmly wrappe ...
DOI:
10.1016/j.memsci.2020.118467

18. Polymer Nanocomposites Based on Poly(ε-caprolactone), Hydroxyapatite and Graphene Oxide

Author:
Gabriela S. Medeiros; Pablo A. R. Muñoz; Camila F. P. de Oliveira; Laura C. E. da Silva; Ritika Malhotra; Maria C. Gonçalves; Vinícius Rosa; Guilhermino J. M. Fechine
Source:
Journal of polymers and the environment 2020 v.28 no.1 pp. 331-342
ISSN:
1566-2543
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; cell proliferation; composite polymers; contact angle; drug delivery systems; graphene oxide; hydrophilicity; hydroxyapatite; lactones; mechanical properties; melting; mixing; polymer nanocomposites; transmission electron microscopy; zeta potential
Abstract:
... Standard and hybrid polymer nanocomposites based on poly(ɛ-caprolactone) (PCL), hydroxyapatite (HAp) and graphene oxide (GO). The GO synthetized here is made up of multilayer graphene oxide (mGO), in which up to five layers are stacked and lateral size around of 1 µm. The nanocomposites (PCL/Hap, PCL/mGO and PCL/HAp/mGO) were prepared by melt mixing in a twin-screw extruder and characterized by me ...
DOI:
10.1007/s10924-019-01613-w

19. Polysulfone metal-activated carbon magnetic nanocomposites with enhanced CO₂ capture

Author:
Muhammad Nisar; Pascal S. Thue; Myriam B. Maghous; Julian Geshev; Eder C. Lima; Sandra Einloft
Source:
RSC advances 2020 v.10 no.57 pp. 34595-34604
ISSN:
2046-2069
Subject:
behavior; carbon; carbon dioxide; contact angle; differential scanning calorimetry; exhibitions; ferromagnetism; hydrophilicity; industrial applications; magnetic properties; mixing; nanocomposites; pyrolysis; sawdust; sorption; temperature; thermogravimetry; thermoplastics; water; wood
Abstract:
... In the present study, polysulfone (PSF)-activated carbon nanocomposites were synthesized by a melt mixing technique. Here, 2 wt% activated carbon (CA, CA–Ni, and CA–Co) was used as filler, and effects on thermal, mechanical, magnetic, morphological, and carbon dioxide capture properties were studied. The pyrolysis of wood sawdust produced carbon materials activated by Co and/or Ni salt. The therma ...
DOI:
10.1039/d0ra06805e

20. Robust Hydrophobic Coatings Using Polymer Blends for the Surface Protection of Marble

Author:
Ryan Lopez; Hua Li; Marck Norret; Swaminatha Iyer; Simon Biggs; Rob Atkin
Source:
Colloids and surfaces 2020 v.599 pp. 124796
ISSN:
0927-7757
Subject:
adhesion; atomic force microscopy; coatings; contact angle; films (materials); hydrophobicity; mixing; polymers; roughness; weathering
Abstract:
... The use of marble in construction is limited by its susceptibility to water spill and weathering. Here, a series of poly (2,2,2-trifluoroethyl methacrylate) (PTFEMA) and poly (methacrylic acid) (PMAA) blend films have been coated on a marble surface to test their water spill and weathering protection capability. The morphologies of the coated polymer films on marble (i.e. surface defects and rough ...
DOI:
10.1016/j.colsurfa.2020.124796

21. Roughness-enhanced hydrophobic graphene oxide membrane for water desalination via membrane distillation

Author:
Yangyang Mao; Qingbo Huang; Baochun Meng; Kai Zhou; Gongping Liu; Annarosa Gugliuzza; Enrico Drioli; Wanqin Jin
Source:
Journal of membrane science 2020 v.611 pp. 118364
ISSN:
0376-7388
Subject:
artificial membranes; contact angle; desalination; distillation; graphene oxide; heat transfer; hydrophobicity; mixing; models; nanoparticles; salt concentration; silica; sodium chloride; sodium dodecyl sulfate; surface roughness; surfactants; temperature
Abstract:
... Novel design of hydrophobic membrane could improve the efficiency of membrane distillation (MD) technology. Owning to being easy to realize hydrophobic modification, fast radial heat transfer rate and limiting the passage of larger contaminants, hydrophobic graphene oxide (GO) membrane shows potential for MD process. In this work, we reported on a new type of nanoparticles intercalated GO membrane ...
DOI:
10.1016/j.memsci.2020.118364

22. Self-luminescent PVDF membrane hybrid with rare earth nanoparticles for real-time fouling indication

Author:
Kai Fan; Jianxi Huang; Enmei Liu; Jun Hu; Haijun Yang
Source:
Journal of membrane science 2020 v.606 pp. 118123
ISSN:
0376-7388
Subject:
aqueous solutions; artificial membranes; atomic force microscopy; bovine serum albumin; cleaning; contact angle; coprecipitation; dysprosium; europium; fouling; humic acids; light intensity; membrane permeability; mixing; nanoparticles; pollution; scanning electron microscopy; separation; thermoplastics
Abstract:
... A kind of hybrid membrane with self-luminescent property was prepared by mixing rare earth nanoparticles of nano-Sr₄Al₂O₄: Eu²⁺, Dy³⁺ into the casting solution dissolved with polyvinylidene fluoride (PVDF), and then coprecipitated through non-solvent induced phase separation (NIPS) method. Membrane were characterized by luminescent intensity, scanning electron microscopy (SEM), atomic force micros ...
DOI:
10.1016/j.memsci.2020.118123

23. Simultaneous nitrification and denitrification process using novel surface-modified suspended carriers for the treatment of real domestic wastewater

Author:
Tao Liu; Xiaolu He; Guangyue Jia; Jiawei Xu; Xie Quan; Shijie You
Source:
Chemosphere 2020 v.247 pp. 125831
ISSN:
0045-6535
Subject:
Gemmobacter; Mesorhizobium; Nitrobacter; Nitrosomonas; Ottowia; Thermomonas; biofilm; biomass; carbon nitrogen ratio; chemical oxygen demand; contact angle; denitrification; denitrifying microorganisms; hydrophilicity; mixing; moving bed biofilm reactors; municipal wastewater; nitrification; nitrogen content; nitrous oxide; pH; pollution control; polymers
Abstract:
... Moving-bed biofilm reactor (MBBR) is a well-established technology for simultaneous nitrification and denitrification (SND). In MBBR, biofilm development and pollutant removal performance are strictly governed by the physico-chemical properties of the carriers. In this study, novel surface-modified carriers with enhanced hydrophilicity (surface contact angle of 60.2 ± 2.3°) and positively-charged ...
DOI:
10.1016/j.chemosphere.2020.125831

24. Superhydrophobic (polyvinylidene fluoride-co-hexafluoropropylene)/ (polystyrene) composite membrane via a novel hybrid electrospin-electrospray process

Author:
Wei Jia; Jehad A. Kharraz; Jiaxin Guo; Alicia Kyoungjin An
Source:
Journal of membrane science 2020 v.611 pp. 118360
ISSN:
0376-7388
Subject:
adhesion; asymmetric membranes; contact angle; desalination; distillation; hydrophobicity; liquids; mixing; polystyrenes; porosity; solvents
Abstract:
... A novel hybrid electrospin-electrospray process was introduced to manipulate the membrane hierarchical structure towards enhanced surface superhydrophobicity and structural integrity. In this study, the two-nozzle mode was used to simultaneously electrospin PH (polyvinylidene fluoride-co-hexafluoropropylene) fibers and electrospray PS (polystyrene) beads to prepare a PH-PS composite membrane, duri ...
DOI:
10.1016/j.memsci.2020.118360

25. The effects of rubber nanoparticles with different polarities on thermal properties and foaming performance of polypropylene blends

Author:
Bo Tian; Zhigang Li; Jinfeng Li; Gang Yao; Wei Dong; Yuguang Liu; Mingwei Di
Source:
RSC advances 2020 v.10 no.52 pp. 31355-31362
ISSN:
2046-2069
Subject:
acrylamides; cell structures; contact angle; crystal structure; crystallization; cyclization reactions; degradation; density; energy; foaming; hydrogen bonding; mixing; nanoparticles; nitriles; polypropylenes; rheological properties; rubber; temperature; thermal properties; water
Abstract:
... Polypropylene blends with both polybutadiene rubber (PB) and polycarboxylbuturonile rubber (xNBR) and the required amount of acrylamide (AM) was prepared by blending with water, and the crystallinity, rheological behaviour and thermal performance were analysed and compared. The results of DSC and XRD characterization showed an obvious enhancement in the crystallization of the PP matrix in PP/xNBR/ ...
DOI:
10.1039/d0ra04486e

26. Treatment mechanism of sludge containing highly viscous heavy oil using biosurfactant

Author:
Hongyang Ren; Sanyu Zhou; Bing Wang; Lei Peng; Xiaoge Li
Source:
Colloids and surfaces 2020 v.585 pp. 124117
ISSN:
0927-7757
Subject:
adsorption; asphaltenes; biosurfactants; cleaning; cleaning agents; contact angle; mixing; oil fields; oil-water interface; oils; petroleum; pollutants; sludge; storage time; surface tension; temperature; viscosity; wettability; China
Abstract:
... The mechanism and influencing factors of sludge de-oiling process collected from the Tahe oil field, a thickened oil field in China, were investigated using biosurfactant. The oily sludge was collected from ground sludge near the oil-well blowout and pipeline perforation, and the storage time about 3∼5 years, resulting in high content of heavy components in the sludge. The viscosity of the recover ...
DOI:
10.1016/j.colsurfa.2019.124117

27. A novel ion-imprinted membrane induced by amphiphilic block copolymer for selective separation of Pt(IV) from aqueous solutions

Author:
Jianxian Zeng; Chaoqiang Lv; Guoqing Liu; Zhe Zhang; Zhihui Dong; JinYan Liu; Ying Wang
Source:
Journal of membrane science 2019 v.572 pp. 428-441
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; adsorption; aqueous solutions; artificial membranes; composite polymers; contact angle; copper; ions; microfiltration; mixing; nickel; nuclear magnetic resonance spectroscopy; platinum; polymerization; polymethylmethacrylate; scanning electron microscopy; solvents; thermoplastics
Abstract:
... A novel ion-imprinted blend membrane was fabricated to separate selectively platinum(IV) from aqueous media. An amphiphilic copolymer poly(methyl methacrylate)-b-poly(4-vinylpyridine) (PMMA-b-P4VP) was firstly synthesized via the reversible addition fragmentation chain transfer polymerization, and characterized by 1H NMR, FT-IR and GPC. Subsequently, poly(vinylidene fluoride) (PVDF) blend membrane ...
DOI:
10.1016/j.memsci.2018.11.016

28. An investigation into the kinematics of magnetically driven droplets on various (super)hydrophobic surfaces and their application to an automated multi-droplet platform

Author:
Prashant Agrawal; Kyle J. Bachus; Gabrielle Carriere; Phoenix Grouse; Richard D. Oleschuk
Source:
Analytical and bioanalytical chemistry 2019 v.411 no.21 pp. 5393-5403
ISSN:
1618-2642
Subject:
DNA; automation; coatings; contact angle; droplets; friction; hydrophobicity; kinematics; magnetic fields; mixing
Abstract:
... Magnetic actuation on digital microfluidic (DMF) platforms may provide a low-cost, less cumbersome alternative for droplet manipulation in comparison to other techniques such as electrowetting-on-dielectric. Precise control of droplets in magnetically driven DMF platforms is achieved using a low-friction surface, magnetically susceptible material/droplet(s), and an applied magnetic field. Superhyd ...
DOI:
10.1007/s00216-018-1378-y

29. Antifouling and antibacterial evaluation of ZnO/MWCNT dual nanofiller polyethersulfone mixed matrix membrane

Author:
Wen Yu Pang; Abdul Latif Ahmad; Nur Dina Zaulkiflee
Source:
Journal of environmental management 2019 v.249 pp. 109358
ISSN:
0301-4797
Subject:
antibacterial properties; antifouling activities; carbon nanotubes; contact angle; filtration; humic acids; hydrophilicity; mixing; models; porosity; scanning electron microscopy; synergism; zinc oxide
Abstract:
... The aim of this study is to evaluate the performance and antifouling properties of polyethersulfone (PES) membrane incorporated with dual nanofiller, zinc oxide (ZnO) and multi-walled carbon nanotube (MWCNT). The synergistic effect of the these nanofillers in PES membrane is studied by blending different ratio of ZnO/MWCNT nanofiller into the PES membrane. The fabricated membranes were characteriz ...
DOI:
10.1016/j.jenvman.2019.109358

30. Bioinspired Superwettable Covalent Organic Framework Nanofibrous Composite Membrane with a Spindle-Knotted Structure for Highly Efficient Oil/Water Emulsion Separation

Author:
Zongxuan Zhang; Na Han; Linli Tan; Yongqiang Qian; Haoran Zhang; Menglu Wang; Wei Li; Zhenyu Cui; Xingxiang Zhang
Source:
Langmuir 2019 v.35 no.50 pp. 16545-16554
ISSN:
1520-5827
Subject:
adsorption; antifouling activities; asymmetric membranes; catalytic activity; contact angle; emulsions; gravity; hydrophobicity; mixing; nanofibers; oils; polyacrylonitrile; wastewater treatment
Abstract:
... Covalent organic frameworks (COFs) have attracted broad interest in a number of fields including gas access, catalysis, and ionic adsorption. However, owing to the low stability in water, the application of COFs in the field of oil/water separation is extensively impeded. In this paper, we synthesized COF-DhaTab/polyacrylonitrile (PAN) nanofibrous composite membranes with a bioinspired spindle-kno ...
DOI:
10.1021/acs.langmuir.9b02661

31. Cross-linking of dialdehyde carboxymethyl cellulose with silk sericin to reinforce sericin film for potential biomedical application

Author:
Peng Wang; Huawei He; Rui Cai; Gang Tao; Meirong Yang; Hua Zuo; Ahmad Umar; Yejing Wang
Source:
Carbohydrate polymers 2019 v.212 pp. 403-411
ISSN:
0144-8617
Subject:
Bombyx mori; Fourier transform infrared spectroscopy; artificial skin; biocompatibility; biocompatible materials; carboxymethylcellulose; cell adhesion; cell proliferation; contact angle; crosslinking; hemolysis; hydrophilicity; mixing; oxidation; scanning electron microscopy; schiff bases; sericin; silk; tensile strength; tissue engineering; viability
Abstract:
... Developing biomaterials based on the natural biomacromolecule silk sericin from Bombyx mori cocoon is of great interest for biomedical application. Dialdehyde carboxymethyl cellulose (DCMC) is derived from periodate oxidation of carboxy- methyl cellulose. Here, we developed a novel strategy of cross-linking of sericin with DCMC via the Schiff’s base reaction. Fourier transform infrared spectroscop ...
DOI:
10.1016/j.carbpol.2019.02.069

32. Development of a new blended polyethersulfone membrane for dye removal from synthetic wastewater

Author:
S. Ashok Kumar; G. Srinivasan; S. Govindaradjane
Source:
Environmental nanotechnology, monitoring & management 2019 v.12 pp. 100238
ISSN:
2215-1532
Subject:
barium; chlorides; contact angle; effluents; hydrophilicity; industrial wastewater; membrane permeability; methylene blue; mixing; porosity; separation; toxicity; ultrafiltration
Abstract:
... The wastewater produced from various industries like textile, paper, rubber, leather, plastics, cosmetics, pharmaceuticals contains many dyes. Most commonly found dyes in these effluents are Orange G and Methylene blue. These dyes are toxic and are harmful to the environment as well as humans. Hence they need to be removed from the wastewater. Polyethersulfone (PES) membranes are most widely used ...
DOI:
10.1016/j.enmm.2019.100238

33. Development of non-fluorine superhydrophobic textiles using polypropylene resins

Author:
Jung Yoon Kim; Changsang Yun; Chung Hee Park
Source:
Textile research journal 2019 v.89 no.19-20 pp. 4015-4027
ISSN:
1746-7748
Subject:
contact angle; drying temperature; energy; evaporation; fabrics; fluorine; hydrophobicity; mixing; mixing ratio; nanoparticles; permeability; polyesters; polypropylenes; resins; roughness; solvents; textile fibers; toxicity; vapors; wettability
Abstract:
... This study aims to develop environment-friendly superhydrophobic textiles forming nanoparticles of polypropylene that have intrinsically low surface energy, and thus achieving the requirements for superhydrophobicity, such as hierarchical roughness and low surface energy at once. This work mainly studies the influences of tacticity (isotactic, atactic), concentration (10, 20, 30 and 40 mg/ml), dry ...
DOI:
10.1177/0040517519826931

34. Engineering biomimetic polyurethane using polyethylene glycol and gelatin for blood-contacting applications

Author:
Piyush W. Raut; Ajinkya A. Shitole; Anand Khandwekar; Neeti Sharma
Source:
Journal of materials science 2019 v.54 no.14 pp. 10457-10472
ISSN:
0022-2461
Subject:
adhesion; adsorption; biocompatibility; biomimetics; blood platelets; cell adhesion; contact angle; gelatin; hemolysis; hydrophilicity; infrared spectroscopy; mechanical properties; medical equipment; mixing; polyethylene glycol; polyurethanes; prothrombin; surface proteins; thermal properties; thermogravimetry; thromboplastin; water uptake; wide-angle X-ray scattering
Abstract:
... Polyurethane (PU) has been utilized in the development of various blood-contacting medical devices owing to their good biocompatibility and mechanical properties. The present study highlights the design and engineering of biomimetic polyurethanes with enhanced hemocompatibility by blending it with polyethylene glycol (PEG) and modifying its surface using gelatin as a surface modifier. The physicoc ...
DOI:
10.1007/s10853-019-03643-0

35. Enhancement of the physical, mechanical and thermal properties of cactus mucilage films by blending with polyvinyl alcohol

Author:
Rim Gheribi; Mohamed Amine Gharbi; Monia El Ouni; Khaoula Khwaldia
Source:
Food packaging and shelf life 2019 v.22 pp. 100386
ISSN:
2214-2894
Subject:
Fourier transform infrared spectroscopy; absorption; cacti and succulents; contact angle; food packaging; glass transition temperature; hydrogen bonding; mixing; moieties; mucilages; packing houses; polyvinyl alcohol; shelf life; tensile strength; thermal stability
Abstract:
... Novel films were developed by blending cactus mucilage (CM) with polyvinyl alcohol (PVA) at four different ratios (90:10, 80:20, 70:30, and 60:40, CM: PVA). The developed composites were characterized for their structural, optical, physical, barrier, mechanical and thermal properties. Optimum CM/PVA blend was obtained at the ratio 80:20 giving an increase in tensile strength, elongation at break a ...
DOI:
10.1016/j.fpsl.2019.100386

36. Environmentally Benign Hydrophobic Hyperbranched Waterborne Polyester/SiO₂–Carbon Dot Nanocomposite as an Efficient Photocatalyst and White-Light Emitter

Author:
Deepshikha Hazarika; Niranjan Karak
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.51 pp. 23068-23082
ISSN:
1520-5045
Subject:
Pseudomonas aeruginosa; biodegradability; carbon; contact angle; hardness; hot water treatment; hydrophobicity; mixing; nanocomposites; nanohybrids; photocatalysis; photocatalysts; photoluminescence; pollutants; polyesters; rhodamines; silica; surface area; temperature; tensile strength; thermal degradation; ultraviolet radiation; white light
Abstract:
... In this study, a SiO₂@carbon dot (CD) nanohybrid was prepared by a hydrothermal method and incorporated into waterborne polyester matrix through an in situ process to develop the polyester nanocomposite. The nanohybrid possesses a specific surface area of 348.67 m²/g and pore volume of 0.927 cc/g. The nanocomposite exhibited a wavelength-dependent photoluminescence property. The thermosetting nano ...
DOI:
10.1021/acs.iecr.9b04725

37. Fabricating PES/SPSF membrane via reverse thermally induced phase separation (RTIPS) process to enhance permeability and hydrophilicity

Author:
Sheng-Hui Liu; Hang Yang; Shi-Feng Ji; Chun-Mei Gao; Han Fang; Yun-Qing Xing; Nai-Xu Han; Guo-Dong Ding; Lei Jia
Source:
RSC advances 2019 v.9 no.46 pp. 26807-26816
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; atomic force microscopy; coagulation; contact angle; hydrophilicity; mixing; permeability; scanning electron microscopy; separation; surface roughness; temperature
Abstract:
... A new method was presented to prepare hydrophilic PES/SPSF flat-sheet membrane by a reverse thermally induced phase separation (RTIPS) method to enhance permeability and hydrophilicity. SPSF was self-made and was blended to improve the hydrophilicity of PES flat-sheet membrane. The performance of PES/SPSF flat-sheet membrane, which varied with SPSF content and coagulation water bath temperature, w ...
DOI:
10.1039/c9ra05707b

38. Improved separation and antifouling properties of PVDF gravity-driven membranes by blending with amphiphilic multi-arms polymer PPG-Si-PEG

Author:
Haicheng Jiang; Qi Zhao; Panpan Wang; Jun Ma; Xuedong Zhai
Source:
Journal of membrane science 2019 v.588 pp. 117148
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; antifouling activities; artificial membranes; bovine serum albumin; contact angle; gravity; hydrophilicity; mixing; models; propylene glycol; scanning electron microscopy; separation; thermoplastics
Abstract:
... Fabricating high-flux, low-fouling gravity-driven membranes (GDM) has proved to be an extremely challenging work. In this study, a novel tailored amphiphilic multi-arms polymer poly(propylene glycol)-silane-poly(ethylene glycol) (PPG-Si-PEG) was synthesized and blended into Polyvinylidene Fluoride (PVDF) matrix to fabricate GDM via nonsolvent induced phase separation method. The incorporation of m ...
DOI:
10.1016/j.memsci.2019.05.072

39. One-pot fabrication of superhydrophobic and flame-retardant coatings on cotton fabrics via sol-gel reaction

Author:
Dongmei Lin; Xingrong Zeng; Hongqiang Li; Xuejun Lai; Tongyi Wu
Source:
Journal of colloid and interface science 2019 v.533 pp. 198-206
ISSN:
0021-9797
Subject:
ammonia; ammonium polyphosphates; cellulose; clothing; coatings; contact angle; cost effectiveness; cotton fabric; durability; ethanol; hydrogen bonding; hydrophobicity; lint cotton; mixing; oxygen; polydimethylsiloxane
Abstract:
... Waterproof and flame-retardant fabrics are widely utilized in many fields, such as automotive interiors, indoor decorations, outdoor clothing and tents. Herein, a facile one-pot sol-gel approach was developed to construct superhydrophobic and flame-retardant (SFR) coatings on cotton fabrics. The cotton fabric was activated by O₂ plasma and then immersed into the ethanol suspension containing tetra ...
DOI:
10.1016/j.jcis.2018.08.060

40. Parallel advances in improving mechanical properties and accelerating degradation to polylactic acid

Author:
Lu Wan; Shuai Zhou; Yanhua Zhang
Source:
International journal of biological macromolecules 2019 v.125 pp. 1093-1102
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; contact angle; differential scanning calorimetry; hydrolysis; hydrophilicity; melting; mixing; modulus of elasticity; particle size; polylactic acid; polymethylmethacrylate; tensile strength; water uptake; wood flour
Abstract:
... Going up further on the basis of excellent mechanical properties and solving the long-standing shortcoming of the slow degradation rate were developed in parallel for polylactic acid (PLA). The polylactic acid/wood flour/polymethylmethacrylate (PLA/WF/PMMA) composites were prepared by melt blending used PLA as matrix, WF of diverse particle size with PMMA at 8:2 mass ratio totally filled with 20 w ...
DOI:
10.1016/j.ijbiomac.2018.12.148

41. Preparation and biocompatibility of Fe₅₀Ni₅₀p/HAP/PEEK biocomposites with weak magnetic properties

Author:
Dengyu Liu; Zhenghou Zhu; Jia Zhou; Hui Zhao; Jie Chen; Ruru Bai; Qianying Lin; Manikandan Alagarsamy
Source:
RSC advances 2019 v.9 no.18 pp. 10081-10090
ISSN:
2046-2069
Subject:
alloys; biocompatibility; biocomposites; chemical reduction; contact angle; hardness; hydroxyapatite; magnetic fields; magnetic properties; mixing; particle size; powders; prostheses
Abstract:
... Hydroxyapatite (HAP)/polyetheretherketone (PEEK) composites are widely used in the new generation of bone implant materials. The use of weak magnetic fields can promote the biocompatibility of PEEK materials. In this paper, Fe₅₀Ni₅₀ alloy nanopowders and Fe₅₀Ni₅₀/HAP/PEEK composites were prepared by liquid phase chemical reduction and liquid phase mixing. The prepared Fe₅₀Ni₅₀ alloy nanopowders ha ...
DOI:
10.1039/c9ra00719a

42. Preparation of biodiesel oil-in-water nanoemulsions by mixed surfactants for bifenthrin formulation

Author:
Huiqiong Yan; Chaoling Bao; Xiuqiong Chen; Changjiang Yu; Dulin Kong; Jianjun Shi; Qiang Lin
Source:
RSC advances 2019 v.9 no.21 pp. 11649-11658
ISSN:
2046-2069
Subject:
Ostwald ripening; adsorption; anionic surfactants; bifenthrin; biodiesel; contact angle; droplet size; emulsifying; high performance liquid chromatography; insecticidal properties; leaves; light scattering; mixing; nanoemulsions; nonionic surfactants; pesticide application; shelf life; spraying; surface tension; temperature
Abstract:
... Although several approaches have been reported on the development of nanoemulsions over the last few years, studies on the formation of biodiesel nanoemulsions for bifenthrin formulation by the low-energy phase inversion composition (PIC) method are still scarce. Herein, the preparation of oil-in-water (O/W) nanoemulsions suitable for pesticide application has been achieved in biodiesel by dissolv ...
DOI:
10.1039/c9ra00591a

43. Simulation and characterization of novel reverse osmosis membrane prepared by blending polypyrrole coated multiwalled carbon nanotubes for brackish water desalination and antifouling properties using artificial neural networks

Author:
Javad Farahbakhsh; Mohammad Delnavaz; Vahid Vatanpour
Source:
Journal of membrane science 2019 v.581 pp. 123-138
ISSN:
0376-7388
Subject:
antifouling activities; artificial membranes; brackish water; carbon nanotubes; contact angle; desalination; fouling; mixing; nanocomposites; neural networks; polyamides; polymerization; pyrroles; reverse osmosis; surface roughness; temperature
Abstract:
... Initially, new nanocomposite reverse osmosis (RO) membranes containing polypyrrole (PPy) coated on multiwalled carbon nanotubes (MWCNTs) were synthesized. Then, the synthesized membranes were prepared to model flux measurements using artificial neural networks (ANNs). Raw and oxidized MWCNTs were coated with the polypyrrole and then various amounts of them were mixed in m-phenylene diamine solutio ...
DOI:
10.1016/j.memsci.2019.03.050

44. Starch/PVA hydrogels for oil/water separation

Author:
Kirti Thakur; Aditya Rajhans; Balasubramanian Kandasubramanian
Source:
Environmental science and pollution research international 2019 v.26 no.31 pp. 32013-32028
ISSN:
0944-1344
Subject:
absorbents; biodegradability; biodegradation; brittleness; contact angle; crosslinking; emulsions; hydrogels; irrigation; mixing; oils; plasticity; polymers; porosity; product development; semiarid zones; starch; swelling (materials); water uptake
Abstract:
... PVA polymers have been well-known as water-absorbing materials but their brittle nature hinders their applicability. In this study, we enhanced the strength of hydrogel and its water-absorbing capabilities by glutaraldehyde-assisted crosslinking of starch with PVA and blending BMIM-BF₄ to enhance the plasticity and generate porosity within the hydrogel multiplying the swelling capacity up to 300% ...
DOI:
10.1007/s11356-019-06327-z

45. Structural and sorption properties of bio-nanocomposite films based on κ-carrageenan and cellulose nanocrystals

Author:
Maria-Cristina Popescu; Bianca-Ioana Dogaru; Dongyang Sun; Elena Stoleru; Bogdan C. Simionescu
Source:
International journal of biological macromolecules 2019 v.135 pp. 462-471
ISSN:
0141-8130
Subject:
biodegradability; biopolymers; cellulose; contact angle; hydrogen bonding; infrared spectroscopy; kappa carrageenan; mixing; moieties; nanocomposites; nanocrystals; principal component analysis; proteins; sorption; water uptake
Abstract:
... There is an increased interest on changing the synthetic based materials to biodegradable ones, especially with natural polymers, polysaccharides or proteins. In this research we prepared bio-nanocomposite formulations with different component concentrations and investigated their structural features, with focus on the interactions, sorption properties, and how the combination between them influen ...
DOI:
10.1016/j.ijbiomac.2019.05.194

46. Superhydrophobic nanocomposite coatings with photoinitiated three-dimensional networks based on reactive graphene nanosheet-induced self-wrinkling patterned surfaces

Author:
Yefeng Feng; Cheng Peng; Yandong Li; Jianbing Hu; Qihuang Deng; Qin Wu; Zhichao Xu
Source:
Journal of colloid and interface science 2019 v.536 pp. 149-159
ISSN:
0021-9797
Subject:
bisphenol A; coatings; contact angle; crosslinking; fluorine; graphene; hydrophobicity; mixing; nanocomposites; nanosheets; nitrogen; pH; polymers; roughness; separation; soaking
Abstract:
... Bionic superhydrophobicity including high contact angle, low sliding angle and nonstick property, combined with both strong pH and ultraviolet (UV) resistance, is difficult to simultaneously achieve for large-scale preparation of superhydrophobic surfaces by blending polymer with a nonreactive inorganic nanofiller.A series of high pH and UV-irradiation-resistant superhydrophobic nanocomposite film ...
DOI:
10.1016/j.jcis.2018.10.046

47. Surface modification of cellulose nanocrystal using succinic anhydride and its effects on poly(butylene succinate) based composites

Author:
Canqing Wu; Xuzhen Zhang; Xiuhua Wang; Qingwen Gao; Xinan Li
Source:
Cellulose 2019 v.26 no.5 pp. 3167-3181
ISSN:
0969-0239
Subject:
Fourier transform infrared spectroscopy; anhydrides; cellulose; contact angle; crystallization; hydrogen bonding; mechanical properties; melting; mixing; modulus of elasticity; moieties; nanocomposites; nanocrystals; scanning electron microscopy; sulfates; thermal stability
Abstract:
... Cellulose nanocrystals (CNCs) extracted from microcrystalline cellulose, were modified by succinic anhydride to give succinic CNCs (SCNCs). Successful surface modification of SCNCs was confirmed by results of FTIR, FE-SEM, contact angle measurement and dispersity test, and SCNCs were then subjected to melt blending with poly(butylene succinate) (PBS) to prepare nanocomposites. Meanwhile, PBS/CNC n ...
DOI:
10.1007/s10570-019-02292-5

48. Synergistic effect of surfactant compounding on improving dust suppression in a coal mine in Erdos, China

Author:
Xiaonan Wang; Shujie Yuan; Xiang Li; Bingyou Jiang
Source:
Powder technology 2019 v.344 pp. 561-569
ISSN:
0032-5910
Subject:
coal; contact angle; dust; mechanization; micelles; mixing; powders; surface tension; surfactants; synergism; wettability; China
Abstract:
... To effectively improve the ability of water for coal dust suppression using in a coal mine in Erdos, China, surfactant compounding was proposed because of the synergy between surfactants. First, four surfactants with good coal dust wetting ability were selected from a total of 15 surfactants through surface tension, contact angle, and coal dust sedimentation experiments. Next, a compound surfactan ...
DOI:
10.1016/j.powtec.2018.12.061

49. Synergistic effects of surfactant mixtures on the displacement of nonaqueous phase liquids in porous media

Author:
Tianzhu Qin; Lamia Goual; Mohammad Piri
Source:
Colloids and surfaces 2019 v.582 pp. 123885
ISSN:
0927-7757
Subject:
alkyl glucosides; alkylphenols; carbonates; contact angle; hydrogen bonding; imbibition; mechanism of action; micelles; mixing; nanopores; nonaqueous phase liquids; nonionic surfactants; permeability; petroleum; porous media; quartz; sandstone; solubilization; structure-activity relationships; surface tension; wettability
Abstract:
... Binary surfactant mixtures have often been used to enhance the recovery or cleanup of nonaqueous phase liquids (NAPLs) such as crude oil from subsurface formations. Through synergistic effects, these mixtures further promoted NAPL mobilization and solubilization by lowing NAPL/brine interfacial tension (IFT) and desorbing NAPL from mineral surfaces, thereby altering their wettability. While the im ...
DOI:
10.1016/j.colsurfa.2019.123885

50. Synthesis and properties of castor oil-based waterborne polyurethane/sodium alginate composites with tunable properties

Author:
Xiao Wang; Yi Zhang; Haiyan Liang; Xing Zhou; Changqing Fang; Chaoqun Zhang; Ying Luo
Source:
Carbohydrate polymers 2019 v.208 pp. 391-397
ISSN:
0144-8617
Subject:
aqueous solutions; biocomposites; castor oil; chemical structure; composite films; contact angle; dispersions; mixing; polyurethanes; sodium alginate; storage modulus; tensile strength; thermal stability
Abstract:
... In this paper, bio-based waterborne polyurethane dispersions were successfully prepared from castor oil using 2, 2-dimethylolbutanoic acid as the chain extender. Then, a series of bio-based composite dispersions and films were prepared by blending different amounts of sodium alginate aqueous solution with these bio-based polyurethane dispersions. The chemical structures, thermo-mechanical properti ...
DOI:
10.1016/j.carbpol.2018.12.090