U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Publication year rev 7986-2014 Remove constraint Publication year rev: 7986-2014 Subject term hydrophilicity Remove constraint Subject term: hydrophilicity Subject term contact angle Remove constraint Subject term: contact angle
Start Over

Search

217  Search Results

« Previous | 1 - 20 of 217 |
Number of results to display per page

Search Results

1. A Rapid One-Step Fabrication of Patternable Superhydrophobic Surfaces Driven by Marangoni Instability

Author:
Kang Sung-Min; Hwang Sora; Jin Si-Hyung; Choi Chang-Hyung; Kim Jongmin; Park Bum Jun; Lee Daeyeon; Lee Chang-Soo
Source:
Langmuir 2014 v.30 no.10 pp. 2828-2834
ISSN:
1520-5827
Subject:
coatings; contact angle; convection; ethanol; evaporation; hydrophilicity; hydrophobicity; liquids; nanotechnology; oils; polymerization; roughness; solvents; transportation
Abstract:
... We present a facile and inexpensive approach without any fluorinated chemistry to create superhydrophobic surface with exceptional liquid repellency, transportation of oil, selective capture of oil, optical bar code, and self-cleaning. Here we show experimentally that the control of evaporation is important and can be used to form superhydrophobic surface driven by Marangoni instability: the metho ...
DOI:
10.1021/la500266f

2. A facile strategy to enhance PVDF ultrafiltration membrane performance via self-polymerized polydopamine followed by hydrolysis of ammonium fluotitanate

Author:
Lu Shao; Zhen Xing Wang; Yong Ling Zhang; Zai Xing Jiang; Yu Yan Liu
Source:
Journal of membrane science 2014 v.461 pp. 10-21
ISSN:
0376-7388
Subject:
X-ray photoelectron spectroscopy; adsorption; artificial membranes; atomic force microscopy; bovine serum albumin; contact angle; dopamine; hydrolysis; hydrophilicity; hydrophobicity; remediation; scanning electron microscopy; thermoplastics; titanium dioxide; ultrafiltration
Abstract:
... In this study, to overcome the inherent hydrophobicity and improve the comprehensive performance of polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes, hydrophilic TiO2 particles were utilized to modify PVDF UF membranes. To obtain the strong binding force and homogenous TiO2 distribution on PVDF UF membranes, polydopamine (pDA) as the “bio-glue” was architecturally built between TiO2 a ...
DOI:
10.1016/j.memsci.2014.03.006

3. A fast and convenient cellulose hydrogel-coated colander for high-efficiency oil–water separation

Author:
Fei Lu; Yuning Chen; Na Liu; Yingze Cao; Liangxin Xu; Yen Wei; Lin Feng
Source:
RSC advances 2014 v.4 no.61 pp. 32544-32548
ISSN:
2046-2069
Subject:
air; cellulose; contact angle; freezing; hydrogels; hydrophilicity; hydrophobicity; melting; nylon; oils; urea; wastes
Abstract:
... A cellulose hydrogel was successfully prepared in alkali/urea solution using a freezing/melting method and was coated on nylon mesh. The as-prepared mesh was superhydrophilic in air with a water contact angle of 0° and superoleophobic under water with an oil contact angle above 150°. The hydrophobicity was well maintained in various aqueous phases, which reflects its stability under severe conditi ...
DOI:
10.1039/c4ra04464a

4. A nanoscopic approach to studying evolution in graphene wettability

Author:
Chia-Yun Lai; Tzu-Chieh Tang; Carlo A. Amadei; Alexander J. Marsden; Albert Verdaguer; Neil Wilson; Matteo Chiesa
Source:
Carbon 2014 v.80 pp. 784-792
ISSN:
0008-6223
Subject:
Fourier transform infrared spectroscopy; adsorption; contact angle; electronics; environmental exposure; graphene; hydrophilicity; hydrophobicity; physical phenomena; wettability
Abstract:
... The equilibrium state of graphene surfaces exposed to ambient conditions is of significant importance for applications from electronics to anti-corrosion layers and from a fundamental perspective. The environmental exposure influences macroscopic properties of the graphene surface, as recent studies on wettability reported. However, these studies are controversial for two reasons: firstly, time de ...
DOI:
10.1016/j.carbon.2014.09.034

5. A novel fullerene oxide functionalized silica composite as stationary phase for high performance liquid chromatography

Author:
Houmei Liu; Yong Guo; Xusheng Wang; Xiaojing Liang; Xia Liu; Shengxiang Jiang
Source:
RSC advances 2014 v.4 no.34 pp. 17541-17548
ISSN:
2046-2069
Subject:
Raman spectroscopy; acetonitrile; amino acids; carbohydrates; contact angle; fullerene; high performance liquid chromatography; hydrophilic interaction chromatography; hydrophilicity; microparticles; nucleobases; nucleosides; salt concentration; silica; transmission electron microscopy; water-soluble vitamins
Abstract:
... Hydrophilic interaction liquid chromatography has been widely used for separating hydrophilic compounds and the development of new stationary phases for HILIC is significant. In this study, fullerene oxide was successfully assembled onto silica microspheres to form a FO-modified silica stationary phase. The synthesized material was characterized by elemental analysis, transmission electron microsc ...
DOI:
10.1039/c4ra01408a

6. A novel high-flux, thin-film composite reverse osmosis membrane modified by chitosan for advanced water treatment

Author:
Hiren D. Raval; Pranav S. Rana; Subarna Maiti
Source:
RSC advances 2014 v.5 no.9 pp. 6687-6694
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; atomic force microscopy; chitosan; contact angle; desalination; films (materials); hydrophilicity; pH; reverse osmosis; sodium hypochlorite; solutes; thermal energy; water temperature; water treatment; zeta potential
Abstract:
... Membrane-based desalination is a proven and established technology for mitigating increasing water demand. The high-flux membrane will require lower pressure to produce the given quantity of water and therefore will consume less energy. This work demonstrates a novel method to produce a high-flux membrane by surface modification of thin-film composite reverse osmosis (TFC RO) membrane. TFC RO memb ...
DOI:
10.1039/c4ra12610f

7. A novel salt-responsive TFC RO membrane having superior antifouling and easy-cleaning properties

Author:
Jianqiang Meng; Zhen Cao; Lei Ni; Yufeng Zhang; Xiaoyan Wang; Xin Zhang; Enhua Liu
Source:
Journal of membrane science 2014 v.461 pp. 123-129
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; artificial membranes; betaine; chemical composition; contact angle; fouling; free radicals; hydrophilicity; polymerization; polymers; reverse osmosis; scanning electron microscopy; zeta potential; zwitterions
Abstract:
... A novel salt-responsive thin-film composite (TFC) reverse osmosis (RO) membrane was prepared by tethering a zwitterionic polymer poly (4-(2-sulfoethyl)-1-(4-vinylbenzyl) pyridinium betaine) (PSVBP) onto a commercial RO membrane. The graft polymerization was conducted by surface-initiated free radical polymerization of SVBP initiated by a K2S2O8–NaHSO3 redox system. The membrane surface before and ...
DOI:
10.1016/j.memsci.2014.03.017

8. A novel superhydrophobic hybrid nanocomposite material prepared by surface-initiated AGET ATRP and its anti-icing properties

Author:
Xiaoli Zhan; Yingdi Yan; Qinghua Zhang; Fengqiu Chen
Source:
Journal of materials chemistry A 2014 v.2 no.24 pp. 9390-9399
ISSN:
2050-7496
Subject:
aircraft; blades; coatings; cold zones; contact angle; crystallization; droplets; electron transfer; freezing; heat transfer; hydrophilicity; hydrophobicity; hysteresis; ice; nanocomposites; nanoparticles; polymerization; polymers; power lines; silica; temperature; thermal stability; wind power; wind turbines
Abstract:
... Ice aggregation is a global challenge, especially for cold regions. In this article, a novel anti-icing hybrid material synthesized by grafting fluorinated polymer chains to silica nanoparticles via surface-initiated activators generated by electron transfer atom transfer radical polymerization (SI-AGET ATRP) was proposed. It showed such properties as controllable molecular design, wonderful therm ...
DOI:
10.1039/c4ta00634h

9. A review on ‘self-cleaning and multifunctional materials’

Author:
Prathapan Ragesh; V. Anand Ganesh; Shantikumar V. Nair; A. Sreekumaran Nair
Source:
Journal of materials chemistry A 2014 v.2 no.36 pp. 14773-14797
ISSN:
2050-7496
Subject:
coatings; contact angle; energy; hydrophilicity; hydrophobicity; hysteresis; paints; solar collectors
Abstract:
... This review article exemplifies the importance of self-cleaning materials and coatings. Self-cleaning coatings are becoming an integral part of our daily life because of their utility in various applications such as windows, solar panels, cements, and paints. In this review, various categories of materials for the fabrication of hydrophilic, hydrophobic, oleophobic, amphiphobic and multifunctional ...
DOI:
10.1039/c4ta02542c

10. A simple approach for morphology tailoring of alginate particles by manipulation ionic nature of polyurethanes

Author:
Hamed Daemi; Mehdi Barikani; Mohammad Barmar
Source:
International journal of biological macromolecules 2014 v.66 pp. 212-220
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; chemical structure; contact angle; dispersions; emulsifiers; energy-dispersive X-ray analysis; hydrophilicity; mechanical properties; nanoparticles; polyurethanes; propionic acid; scanning electron microscopy; sodium alginate
Abstract:
... A number of different ionic aqueous polyurethane dispersions (PUDs) were synthesized based on NCO-terminated prepolymers. Two different anionic and cationic polyurethane samples were synthesized using dimethylol propionic acid and N-methyldiethanolamine emulsifiers, respectively. Then, proper amounts of PUDs and sodium alginate were mixed to obtain a number of aqueous polyurethane dispersions–sodi ...
DOI:
10.1016/j.ijbiomac.2014.02.029

11. A study of dye anchoring points in half-squarylium dyes for dye-sensitized solar cells

Author:
Arthur Connell; Peter J. Holliman; Matthew L. Davies; Christopher D. Gwenin; Sophie Weiss; Mateusz B. Pitak; Peter N. Horton; Simon J. Coles; Graeme Cooke
Source:
Journal of materials chemistry A 2014 v.2 no.11 pp. 4055-4066
ISSN:
2050-7496
Subject:
color; contact angle; density functional theory; dyes; esters; hydrophilicity; hydrophobicity; indoles; moieties; solar cells; titanium dioxide
Abstract:
... This paper reports the synthesis of a series of new half-squaraine dyes (Hf-SQ) based around a common chromophoric unit consisting of linked indoline and squaric acid moieties. Carboxylate groups have been incorporated onto this core structure at four different points to study the influence of the anchoring group position on dye-sensitized solar cell (DSC) device performance. Dyes have been linked ...
DOI:
10.1039/c3ta15278b

12. Adhesive forces and surface properties of cold gas plasma treated UHMWPE

Author:
Emily Callard Preedy; Emmanuel Brousseau; Sam L. Evans; Stefano Perni; Polina Prokopovich
Source:
Colloids and Surfaces A: Physicochemical and Engineering Aspects 2014 v.460 pp. 83-89
ISSN:
0927-7757
Subject:
adhesion; cell adhesion; cold; contact angle; crosslinking; friction; helium; hips; hydrophilicity; molecular weight; oxygen; polyethylene; prostheses; proteins
Abstract:
... Cold atmospheric plasma (CAP) treatment was used on ultra-high molecular weight polyethylene (UHMWPE), a common articulating counter material employed in hip and knee replacements. UHMWPE is a biocompatible polymer with low friction coefficient, yet does not have robust wear characteristics. CAP effectively cross-links the polymer chains of the UHMWPE improving wear performance (Perni et al., Acta ...
DOI:
10.1016/j.colsurfa.2014.03.052
PubMed:
25431523
PubMed Central:
PMC4236083

13. Adsorption of shape-anisotropic and porous particles at the air–water and the decane–water interface studied by the gel trapping technique

Author:
Emma L. Sharp; Hamza Al-Shehri; Tommy S. Horozov; Simeon D. Stoyanov; Vesselin N. Paunov
Source:
RSC advances 2014 v.4 no.5 pp. 2205-2213
ISSN:
2046-2069
Subject:
adsorption; anisotropy; aragonite; atomic force microscopy; calcite; cellulose; contact angle; emulsifiers; foams; hydrogels; hydrophilicity; hydrophobicity; microparticles; oil-water interface; scanning electron microscopy; silica
Abstract:
... We have studied the attachment and orientation of anisotropic and porous microparticles at liquid surfaces by using the gel trapping technique (GTT). This technique involves spreading of the microparticles of interest at the liquid interface, subsequent setting of the aqueous phase to a hydrogel thus “arresting” the particle positions at the liquid surface, and further replication of the hydrogel ...
DOI:
10.1039/c3ra44563a

14. Adsorptive Removal of Humic Acid by Zirconia Embedded in a Poly(ether sulfone) Membrane

Author:
Thuyavan Y. Lukka; Anantharaman N.; Arthanareeswaran G.; Ismail A. F.
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.28 pp. 11355-11364
ISSN:
1520-5045
Subject:
adsorption; aquatic organisms; chemical precipitation; contact angle; engineering; groundwater; human health; humic acids; hydrophilicity; methodology; models; pH; permeability; pollutants; ultrafiltration; zirconium oxide
Abstract:
... The presence of humic acid (HA) in groundwater threatens aquatic life and human health; for the effective treatment of such pollutants, an advanced/hybrid method is essential. In this work, zirconia embedded in poly(ether sulfone) (ZrePES) mixed matrix membranes (MMMs) has been studied for the removal of HA. Chemical precipitation method was utilized to prepare nano zirconia (ZrO₂). The modified P ...
DOI:
10.1021/ie5015712

15. Adsorptive removal of nitrate from aqueous solution by polyacrylonitrile–alumina nanoparticle mixed matrix hollow-fiber membrane

Author:
Raka Mukherjee; Sirshendu De
Source:
Journal of membrane science 2014 v.466 pp. 281-292
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; adsorption; adverse effects; aluminum oxide; aqueous solutions; artificial membranes; chlorides; contact angle; filtration; hydrophilicity; nanoparticles; nitrates; permeability; polyacrylonitrile; porosity; scanning electron microscopy; sodium hydroxide; sorption isotherms; strength (mechanics); sulfates; zeta potential
Abstract:
... Hollow fiber mixed matrix membrane (MMM) of polyacrylonitrile and alumina nanoparticle was prepared. Incorporation of alumina in membrane matrix was confirmed by elemental analysis. The membrane was characterized by scanning electron microscopy, contact angle, permeability, neutral polymer rejection, pore size, mechanical strength and zeta potential. Hydrophilicity, mechanical strength and zeta po ...
DOI:
10.1016/j.memsci.2014.05.004

16. Alterable Superhydrophobic–Superhydrophilic Wettability of Fabric Substrates Decorated with Ion–TiO2 Coating via Ultraviolet Radiation

Author:
Yin Yunjie; Guo Ning; Wang Chaoxia; Rao Qingqing
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.37 pp. 14322-14328
ISSN:
1520-5045
Subject:
coatings; contact angle; cotton; cotton fabric; engineering; fluorides; hydrophilicity; hydrophobicity; irradiation; polyesters; silane; storage temperature; titanium dioxide; ultraviolet radiation; wettability; woolen fabric
Abstract:
... To prepare a functional fiber surface with alterable superhydrophobic–superhydrophilic wettability on fabrics, a TiO₂ hybrid sol was synthesized with tetrabutyl titanate and a fluoride silane coupling agent, 1H,1H,2H,2H-perfluorooctyltrimethoxysilane, via sol–gel technology. Within irradiation under UV light, the decay of the contact angle from superhydrophobicity to superhydrophilicity on the irr ...
DOI:
10.1021/ie502338y

17. Amine enrichment and poly(ethylene glycol) (PEG) surface modification of thin-film composite forward osmosis membranes for organic fouling control

Author:
Santiago Romero-Vargas Castrillón; Xinglin Lu; Devin L. Shaffer; Menachem Elimelech
Source:
Journal of membrane science 2014 v.450 pp. 331-339
ISSN:
0376-7388
Subject:
Fourier transform infrared spectroscopy; adhesion; adsorption; alginates; artificial membranes; carboxylation; contact angle; effluents; energy; fouling; hydrophilicity; models; organochlorine compounds; osmosis; polyamides; polyethylene glycol; polymerization; porous media; primary amines; wastewater; zeta potential
Abstract:
... Despite significant advances in forward osmosis (FO) membrane development, organic fouling, due to adsorption of organic molecules prevalent in natural waters and wastewater effluents, remains a major technical problem, decreasing process performance and membrane life. We report the fabrication, characterization, and testing of thin film composite (TFC) FO membranes functionalized with poly(ethyle ...
DOI:
10.1016/j.memsci.2013.09.028

18. Ammonia plasma treatment as a method promoting simultaneous hydrophilicity and antimicrobial activity of viscose wound dressings

Author:
Zdenka Peršin; Rok Zaplotnik; Karin Stana Kleinschek
Source:
Textile research journal v.84 no.2 pp. 140-156
ISSN:
1746-7748
Subject:
Enterococcus faecalis; Escherichia coli; Pseudomonas aeruginosa; Staphylococcus aureus; X-ray photoelectron spectroscopy; ammonia; antimicrobial properties; atomic force microscopy; bacteria; contact angle; fabrics; hydrophilicity; nitrogen; textile fibers; viscose
Abstract:
... Viscose non-woven was treated by NH3 plasma. Different exposure times were used in order to find the optimum conditions for simultaneously improved hydrophilicity and antimicrobial activity, as desired effects by wound dressings. Both chemical and morphological modifications were studied by X-ray photoelectron spectroscopy and atomic force microscopy, respectively, revealing functionalization with ...
DOI:
10.1177/0040517513485631

19. Amphiphilic Cellulose Nanocrystals from Acid-Free Oxidative Treatment: Physicochemical Characteristics and Use as an Oil–Water Stabilizer

Author:
Visanko Miikka; Liimatainen Henrikki; Sirviö Juho Antti; Heiskanen Juha Pentti; Niinimäki Jouko; Hormi Osmo
Source:
Biomacromolecules 2014 v.15 no.7 pp. 2769-2775
ISSN:
1526-4602
Subject:
acid hydrolysis; butylamine; cellulose; cellulosic fibers; contact angle; emulsions; homogenization; hydrophilicity; hydrophobicity; isomers; nanocrystals; nuclear magnetic resonance spectroscopy; oils; oxidation
Abstract:
... A chemical pretreatment for producing cellulose nanocrystals (CNCs) with periodate oxidation and reductive amination is reported. This new functionalization of cellulose fibers dispenses an alternative method for fabricating individual CNCs without the widely used acid hydrolysis process. CNCs can be directly modified during the pretreatment step, and no additional post-treatments are required to ...
DOI:
10.1021/bm500628g

20. Antibacterial Activity of Ordered Gold Nanorod Arrays

Author:
Zhu Yuejing; Ramasamy Mohankandhasamy; Yi Dong Kee
Source:
ACS Applied Materials & Interfaces 2014 v.6 no.17 pp. 15078-15085
ISSN:
1944-8252
Subject:
Escherichia coli; air temperature; antibacterial properties; contact angle; flow cytometry; fluorescence microscopy; glass; gold; hydrophilicity; irradiation; nanorods; pathogens; scanning electron microscopy; water treatment
Abstract:
... Well-packed two- and three-dimensional (2D and 3D) gold nanorod (AuNR) arrays were fabricated using confined convective arraying techniques. The array density could be controlled by changing the concentration of the gold nanorods solution, the velocity of the moving substrate, and the environment air-temperature. The hydrophilic behavior of glass substrates before and after surface modification wa ...
DOI:
10.1021/am503153v