U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Journal Colloids and surfaces Remove constraint Journal: Colloids and surfaces Publication Year 2019 Remove constraint Publication Year: 2019
Start Over

Search

1,982  Search Results

« Previous | 1 - 20 of 1,982 |
Number of results to display per page

Search Results

1. Adsorption behavior of mixed dodecane/n-valeric acid collectors on low-rank coal surface: Experimental and molecular dynamics simulation study

Author:
Liu, Zechen; Xia, Yangchao; Lai, Qingteng; An, Maoyan; Liao, Yinfei; Wang, Yongtian
Source:
Colloids and surfaces 2019 v.583 pp. 123840
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; absorption; adsorption; coal; collectors; contact angle; energy; hydrophilicity; hydrophobicity; lipophilicity; moieties; molecular dynamics
Abstract:
... In this investigation, a mixed collector (MC) of dodecane and n-valeric acid was used to improve low rank coal flotation. Fourier transformation infrared spectroscopy (FTIR) measurements and contact angle measurements were conducted to explain flotation responses. Furthermore, using a molecular dynamics (MD) simulation, the changes of water/collector (dodecane or MC)/coal systems were studied befo ...
DOI:
10.1016/j.colsurfa.2019.123840

2. Adsorption of Pb2+ and Cd2+ onto Spirulina platensis harvested by polyacrylamide in single and binary solution systems

Author:
Sun, Xiaolu; Huang, Haiyan; Zhu, Yaqun; Du, Yingying; Yao, Lunguang; Jiang, Xincheng; Gao, Pengcheng
Source:
Colloids and surfaces 2019 v.583 pp. 123926
ISSN:
0927-7757
Subject:
Arthrospira platensis; Fourier transform infrared spectroscopy; adsorbents; adsorption; cadmium; cations; energy-dispersive X-ray analysis; heavy metals; industrial wastewater; lead; metal ions; microalgae; models; pH; polyacrylamide; scanning electron microscopy; sorption isotherms; wastewater treatment
Abstract:
... This study examined the feasibility and characteristics of microalgae waste treatment using a mixture of Spirulina platensis and polyacrylamide (SP-PAM) as an adsorbent system for removing Pb²⁺ and Cd²⁺ from simulated wastewater in single and binary solution systems. Multiple techniques, including scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), energy-dispersiv ...
DOI:
10.1016/j.colsurfa.2019.123926

3. Adsorption of U(VI) on montmorillonite in the presence of ethylenediaminetetraacetic acid

Author:
Zhou, Wanqiang; Wang, Jingyi; He, Jiangang; Yang, Xiaoyu; Shi, Yanlin; Wang, Xiangyun; Liu, Chunli
Source:
Colloids and surfaces 2019 v.583 pp. 123929
ISSN:
0927-7757
Subject:
EDTA (chelating agent); X-ray photoelectron spectroscopy; adsorption; groundwater; infrared spectroscopy; migratory behavior; models; montmorillonite; pH; radioactive pollution; reflectance spectroscopy; uranium
Abstract:
... The adsorption, diffusion and migration behaviors of uranium may be highly influenced by organics in natural environments. Ethylenediaminetetraacetic acid (EDTA) is one of the most important small organics in groundwaters, especially at the radioactive contaminated sites. In this work, we studied U(VI) adsorption on montmorillonite in the presence of EDTA with batch method. Our results indicated t ...
DOI:
10.1016/j.colsurfa.2019.123929

4. Alginate-cellulose biopolymeric beads as efficient vehicles for encapsulation and slow-release of herbicide

Author:
Nörnberg, Andressa B.; Gehrke, Vinicios R.; Mota, Henrique P.; Camargo, Edinalvo R.; Fajardo, André R.
Source:
Colloids and surfaces 2019 v.583 pp. 123970
ISSN:
0927-7757
Subject:
alginates; cellulose; encapsulation; imazethapyr; liquids; models; pH
Abstract:
... Alginate (ALG) and alginate/cellulose (ALG/CEL) beads were prepared and tested as potential vehicles for encapsulation and controlled release of imazethapyr (IMZ), a broad spectrum herbicide. The incorporation of a small amount of CEL (5 w/w-%) into the ALG network allowed to increase the encapsulation efficiency of IMZ (>85%). CEL also contributed to control of some important features such as the ...
DOI:
10.1016/j.colsurfa.2019.123970

5. Anchoring of green synthesized silver nanoparticles onto various surfaces for enhanced heterogeneous removal of brilliant green dye from aqueous solutions with error analysis study

Author:
El-Sharkawy, Rehab G.
Source:
Colloids and surfaces 2019 v.583 pp. 123871
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorption; aqueous solutions; cost effectiveness; decolorization; dyes; endothermy; equations; hydrogen peroxide; models; nanoparticles; nanosilver; orange peels; particle size; sorption isotherms; spectrophotometers; thermal stability; ultraviolet-visible spectroscopy
Abstract:
... Silver nanoparticles (AgNPs) were immobilized onto either an acid or "base-functionalized" orange peel via the green synthesized method and denoted as AgNPs@OP/A and AgNPs@OP/B. FTIR, UV–vis spectra, XRD, and thermogravemetric analysis techniques characterized the samples obtained. The mean particle size of immobilized AgNPs was computed from the XRD pattern based on the plane's line width, refrac ...
DOI:
10.1016/j.colsurfa.2019.123871

6. A novel and facile method to fabrication of broadband and semi-omnidirectional antireflective coatings with bowl-like pit structure

Author:
Yuan, Junjie; Zhang, Yunbo
Source:
Colloids and surfaces 2019 v.583 pp. 123911
ISSN:
0927-7757
Subject:
angle of incidence; coatings; emulsions; glass; polymerization; sol-gel processing; solvents; transmittance; wavelengths
Abstract:
... In the current work, excellent optical antireflective coatings with various surface morphologies are prepared combining with emulsion polymerization, sol-gel process and dip-coating technique. Among these antireflective coatings, bowl-like pit structure antireflective coatings show broadband and semi-omnidirectional antireflective properties. The mean transmittance of this kind of coatings reaches ...
DOI:
10.1016/j.colsurfa.2019.123911

7. A novel nano-lignin-based amphoteric copolymer as fluid-loss reducer in water-based drilling fluids

Author:
Chang, Xiaofeng; Sun, Jinsheng; Xu, Zhe; Zhang, Fan; Wang, Jintang; Lv, Kaihe; Dai, Zhiwen
Source:
Colloids and surfaces 2019 v.583 pp. 123979
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; UHT treatment; acute toxicity; ammonium persulfate; aqueous solutions; calcium; clay; composite polymers; drilling; filtration; ions; median effective concentration; nuclear magnetic resonance spectroscopy; particle size distribution; petroleum; sodium bisulfite; thermal degradation; thermal stability; thermogravimetry; zeta potential
Abstract:
... In the study, nano-lignin (Nano-LS) was gradually formed from inside to outside via layer-by-layer self-assembly owing to the interaction of π-π bonds, and a novel amphoteric polymer, Nano-LS-g-DAD, was synthesized by grafting N, N-dimethylacrylamide (DMAM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), diallyl dimethyl ammonium chloride (DMDAAC) onto the Nano-LS in an aqueous solution using a ...
DOI:
10.1016/j.colsurfa.2019.123979

8. A novel olive oil fatty acid-based amphiphilic random polyurethane: Micellization and phase transfer application

Author:
Aghaghafari, Elham; Zamanloo, Mohammad Reza; Omrani, Ismail; Salarvand, Ehsan
Source:
Colloids and surfaces 2019 v.583 pp. 123951
ISSN:
0927-7757
Subject:
alkaline hydrolysis; aqueous solutions; atomic force microscopy; chemical structure; contact angle; emulsifying; encapsulation; hydrophilicity; hydrophobicity; light scattering; micelles; nanoparticles; nuclear magnetic resonance spectroscopy; oleic acid; olive oil; polyurethanes; scanning electron microscopy; solvents; ultraviolet-visible spectroscopy
Abstract:
... A novel amphiphilic random polyurethane (APU) having both hydrophilic (Di(ethylene glycol), DEG) and hydrophobic/emulsifying (Oleic acid based dihydroxy fatty acid, DHA) constituents was synthesized and characterized for micellization utility. In order to prepare the dihydroxy acid, epoxidized methyl oleate was ring-opened in aqueous solution followed by alkali hydrolysis. The chemical structure o ...
DOI:
10.1016/j.colsurfa.2019.123951

9. A novel PET fabric with durable anti-fouling performance for reusable and efficient oil-water separation

Author:
Liu, Gaoyang; Wang, Jiajun; Wang, Wei; Yu, Dan
Source:
Colloids and surfaces 2019 v.583 pp. 123941
ISSN:
0927-7757
Subject:
air; antifouling activities; contact angle; fabrics; hydrophobicity; oils; petroleum; pollution; polymerization
Abstract:
... The crude oil leakage pollution has become a serious problem which frequently occurs all over the world. To solve this issue, highly efficient oil-water mixtures separation material requires urgently. Herein, a superhydrophobic PET fabric was developed by using a facile and novel method based on UV induced radical polymerization. The prepared PET fabric showed excellent superhydrophobicity with a ...
DOI:
10.1016/j.colsurfa.2019.123941

10. Application of multi-dimensional (0D, 1D, 2D) nanostructures for the cytological evaluation of cancer cells and their bacterial response

Author:
Wahab, Rizwan; Ahmad, Javed; Ahmad, Naushad
Source:
Colloids and surfaces 2019 v.583 pp. 123953
ISSN:
0927-7757
Subject:
X-radiation; X-ray diffraction; apoptosis; bacteria; bioactive properties; caspase-3; confocal microscopy; gene expression regulation; genes; neoplasm cells; neoplasms; quantum dots; scanning electron microscopy; staining; toxicity testing; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... The size of nanomaterial is a significant parameter, which influences the physicochemical characteristic.These materials also have a part to affect various biological activities in cells and bacterial solution. Because of the larger applicability and enough potential of nanostructures, the current work was displyed the dissimilar shaped nano structures such as quantum dots (QDs), rods (NRs) and sh ...
DOI:
10.1016/j.colsurfa.2019.123953

11. A practical approach to load CuO/MnO2 core/shell nanostructures on textiles through in situ wet chemical synthesis

Author:
Komeily-Nia, Zahra; Montazer, Majid; Aye, San seint seint; Nasri-Nasrabadi, Bijan
Source:
Colloids and surfaces 2019 v.583 pp. 123998
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; antibacterial properties; copper; cupric oxide; energy-dispersive X-ray analysis; fabrics; ions; manganese; manganese dioxide; nanoflowers; nylon; scanning electron microscopy; semiconductors; synthesis; synthetic fibers; transmission electron microscopy
Abstract:
... CuO/MnO₂ core/shell nanostructures were synthesized and successfully loaded on nylon fabric through one step chemical method. Copper oxide (CuO) is a low-cost and stable semiconductor and has promising applications in wearable devices or smart textiles. However, divalent nature of copper atoms makes it difficult to assemble on most synthetic fibers and usually display a poor distribution on fiber ...
DOI:
10.1016/j.colsurfa.2019.123998

12. Biological and corrosion evaluation of Laponite®: Poly(caprolactone) nanocomposite coating for biomedical applications

Author:
Tabesh, E.; Kharaziha, M.; Mahmoudi, M.; Shahnam, E.; Rozbahani, M.
Source:
Colloids and surfaces 2019 v.583 pp. 123945
ISSN:
0927-7757
Subject:
adhesion; bioactive properties; cell proliferation; coatings; corrosion; electric potential difference; electrochemistry; electrophoresis; lactones; nanocomposites; nanoparticles; prostheses; roughness; stainless steel
Abstract:
... In this study, Laponite®:poly(caprolactone)(PCL) nanocomposite coatings were developed on 316 L stainless steel via electrophoretic process to improve its biological and electrochemical characteristics. In this respect, different voltages (60 and 90 V) and weight ratios of Laponite®:PCL (2:5, 1:1 and 5:2) were applied to develop nanocomposite coatings on 316 L stainless steel. Results illustrated ...
DOI:
10.1016/j.colsurfa.2019.123945

13. Biomimetics leading to liquid-infused surface based on vertical dendritic Co matrix: A barrier to inhibit bioadhesion and microbiologically induced corrosion

Author:
Ouyang, Yibo; Zhao, Jin; Qiu, Ri; Hu, Shugang; Niu, Haili; Chen, Ming; Wang, Peng
Source:
Colloids and surfaces 2019 v.583 pp. 124006
ISSN:
0927-7757
Subject:
Nepenthes; bioactive properties; bioadhesion; biomimetics; cobalt; copper; corrosion; dielectric spectroscopy; hydrophobicity; liquids; oils; oxidation; seawater; silicone; sulfate-reducing bacteria; thiols
Abstract:
... Inspired by natural plant Nepenthes pitcher, liquid infused surface (LIS) imparts opportunities in material protection fields. In this report, LIS is realized via compositing superhydrophobic cobalt dendrite matrix and silicone oil phase. Firstly, metallic cobalt dendrite is electrodeposited onto Cu substrate. With oxidation, the dendrite is covered by oxide layer on external surface. Further depo ...
DOI:
10.1016/j.colsurfa.2019.124006

14. Capturing cancer cells using hyaluronic acid-immobilized electrospun random or aligned PLA nanofibers

Author:
Zhao, Yili; Xiong, Jie; Shi, Xiangyang; Ko, Frank
Source:
Colloids and surfaces 2019 v.583 pp. 123978
ISSN:
0927-7757
Subject:
amines; biocompatibility; hyaluronic acid; nanofibers; neoplasm cells; neoplasms; polyethyleneimine; polylactic acid
Abstract:
... The capture of circulating tumor cells (CTCs) is of paramount importance for early cancer diagnosis. Herein, we report the development of hyaluronic acid (HA)-immobilized electrospun random or aligned polylactic acid (PLA) nanofibers for cancer cell capture applications. Electrospun random or aligned PLA nanofibers were modified with HA via polyethylenimine (PEI) as a linker, followed by acetylati ...
DOI:
10.1016/j.colsurfa.2019.123978

15. Carbon dots-embedded fluorescent silica xerogel

Author:
Sarkar, Tamal; Rawat, Kamla; Solanki, Pratima R.; Bohidar, H.B.
Source:
Colloids and surfaces 2019 v.583 pp. 123844
ISSN:
0927-7757
Subject:
ambient temperature; carbon quantum dots; fluorescence; functional properties; gelation; light scattering; nanocomposites; organogels; rheology; silica; xerogels
Abstract:
... Herein, we describe the dynamics of gel transition of silica sol (tetraethoxysilane (TEOS) in ethanol-H₂O to xerogel viaoranogel route. Silica sol made in ethanolic solution turns into an organogel during sol-gel synthesis of TEOS, which eventually makes a phase transition to xerogel following a process of spontaneous dehydration of the gel network at room temperature. It was observed that the gel ...
DOI:
10.1016/j.colsurfa.2019.123844

16. Carbon encapsulated maricite NaFePO4 nanoparticles as cathode material for sodium-ion batteries

Author:
Wang, Duan; Wu, Yuanbo; Lv, Jinmeng; Wang, Rongrong; Xu, Sailong
Source:
Colloids and surfaces 2019 v.583 pp. 123957
ISSN:
0927-7757
Subject:
batteries; carbon; cathodes; coatings; electrochemistry; encapsulation; nanocomposites; nanoparticles; sodium; sol-gel processing
Abstract:
... Sodium-ion batteries (SIBs) have been recognized as one type of the most potential technologies for low-cost rechargeable batteries owing to the abundant resource of sodium. Herein, we present nanosized maricite NaFePO₄ nanoparticles encapsulated within carbon (NFP@NPCM) via a sol-gel method. The resultant NFP@NPCM nanocomposite as cathode material for SIBs exhibits a high capacity retention of mo ...
DOI:
10.1016/j.colsurfa.2019.123957

17. Cellulose fibre- perlite depth filters with cellulose nanofibre top coating for improved filtration performance

Author:
Onur, Aysu; Shanmugam, Kirubanandan; Ng, Aaron; Garnier, Gil; Batchelor, Warren
Source:
Colloids and surfaces 2019 v.583 pp. 123997
ISSN:
0927-7757
Subject:
adsorbents; adsorption; cellulose; cellulosic fibers; coatings; epichlorohydrins; filters; methylene blue; microfiltration; molecular weight; nanofibers; papermaking; perlite; polyethylene glycol; wet strength; wood pulp
Abstract:
... Depth type composite filters are used to remove contaminants from liquids by combining mechanical entrapment and adsorption. Commonly, depth filters can adsorb either anionic or cationic charged contaminants, but not both, as well as filter micron-sized particles. Therefore, there is still a need to improve the existing depth filter performance. In this study, we developed a two-layer filters with ...
DOI:
10.1016/j.colsurfa.2019.123997

18. Construction of ordered multienzyme systems using multifunctional polymer brush-grafted magnetic nanoparticles as scaffolds

Author:
Chen, Zhiwu; Liang, Xingxing; Yang, Rui; Yang, Miao; Tan, Tianwei; Cao, Hui
Source:
Colloids and surfaces 2019 v.583 pp. 123920
ISSN:
0927-7757
Subject:
catalytic activity; glucose oxidase; immobilized enzymes; iron oxides; magnetism; nanoparticles; peroxidase; polymerization; polymers; silica
Abstract:
... A block copolymer brush based on functional monomers (N-succinimidyl acrylate and N-adamantylacrylamide) successfully grew on the surface of Fe₃O₄@SiO₂ nanoparticles by surface-initiated reversible addition-fragmentation chain transfer polymerization (SI-RAFT). According to the multiple recognition mechanisms of this material, horseradish peroxidase (HRP) and β-cyclodextrin-modified glucose oxidas ...
DOI:
10.1016/j.colsurfa.2019.123920

19. Conversion from a natural mineral to a novel effective adsorbent: Utilization of pumice grafted with polymer brush for methylene blue decolorization from aqueous environments

Author:
Yılmaz, Şakir; Zengin, Adem; Ecer, Ümit; Şahan, Tekin
Source:
Colloids and surfaces 2019 v.583 pp. 123961
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; acrylamides; adsorbents; adsorption; cobalt; contact angle; decolorization; methylene blue; pH; polymerization; polymers; pumice; response surface methodology; scanning electron microscopy; temperature; thermodynamics
Abstract:
... The present work reports the adsorption yield of methylene blue (MB) from aqueous environments using pumice (PMC) coated with poly(N-[Tris (hydroxymethyl)methyl]acrylamide), PTHAM@PMC, by surface-initiated reversible addition fragmentation chain transfer (SI-RAFT) polymerization. The synthesized PTHAM@PMC particles were characterized by X-ray photoelectron spectroscopy (XPS), attenuated total refl ...
DOI:
10.1016/j.colsurfa.2019.123961

20. Coordination adsorption of Ag(I) on cobalt-ferrous oxalates and their derived Ag/CoFe2O4 for catalytic hydrogenation reactions

Author:
He, Shixue; Yang, Chao; Niu, Mingguang; Wei, Dandi; Chu, Shasha; Zhong, Mei; Wang, Jide; Su, Xintai; Wang, Lu
Source:
Colloids and surfaces 2019 v.583 pp. 124007
ISSN:
0927-7757
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; catalysts; catalytic activity; chemical reduction; durability; hydrogenation; ions; magnetism; nanoparticles; nitroanilines; oxalates; p-nitrophenol; scanning electron microscopy; silver; surface area; thermal degradation
Abstract:
... Well-defined deposition of noble metal nanoparticles is attractive for the synthesis of heterogeneous metal catalysts with excellent activity, stability, and easy separability. Herein, a facile method combining surface coordination deposition with thermal decomposition has been proposed to fabricate Ag/CoFe₂O₄ composites as magnetic catalysts for hydrogenation reduction of 4-nitrophenol and 2-nitr ...
DOI:
10.1016/j.colsurfa.2019.124007