A Novel Synthetic UV-Curable Fluorinated Siloxane Resin for Low Surface Energy Coating

Low surface energy materials have attracted much attention due to their properties and various applications. In this work, we synthesized and characterized a series of ultraviolet (UV)-curable fluorinated siloxane polymers with various fluorinated acrylates—hexafluorobutyl acrylate, dodecafluoroheptyl acrylate, and trifluorooctyl methacrylate—grafted onto a hydrogen-containing poly(dimethylsiloxane) backbone. The structures of the fluorinated siloxane polymers were measured and confirmed by proton nuclear magnetic resonance and Fourier transform infrared spectroscopy. Then the polymers were used as surface modifiers of UV-curable commercial polyurethane (DR-U356) at different concentrations (1, 2, 3, 4, 5, and 10 wt %). Among three formulations of these fluorinated siloxane polymers modified with DR-U356, hydrophobic states (91°, 92°, and 98°) were obtained at low concentrations (1 wt %). The DR-U356 resin is only in the hydrophilic state at 59.41°. The fluorine and siloxane element contents were investigated by X-ray photoelectron spectroscopy and the results indicated that the fluorinated and siloxane elements were liable to migrate to the surface of resins. The results of the friction recovering assays showed that the recorded contact angles of the series of fluorinated siloxane resins were higher than the original values after the friction-annealing progressing.

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Superhydrophobic engineering materials provide a rapid and simple route for highly efficient self-driven crude oil spill cleanup

RSC Advances ◽

10.1039/c8ra07913g ◽

2018 ◽

Vol 8 (67) ◽

pp. 38363-38369 ◽

Cited By ~ 1

Author(s):

Hongbo Xu ◽

Shulong Bao ◽

Liuting Gong ◽

Renping Ma ◽

Lei Pan ◽

...

Keyword(s):

Surface Energy ◽

Crude Oil ◽

Rough Surface ◽

Oil Spill ◽

Material Surface ◽

Energy Materials ◽

Simple Route ◽

Low Surface Energy ◽

Oil Spill Cleanup ◽

Crude Oil Spill

Traditional superhydrophobic material use depends on two processes: creating a rough structure on a material surface and modifying the rough surface with low surface energy materials.

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Corona Treatment of Filled Dual-polymer Dispersion Coatings: Surface Properties and Grease Resistance

Polymers and Polymer Composites ◽

10.1177/096739111702500402 ◽

2017 ◽

Vol 25 (4) ◽

pp. 257-266 ◽

Cited By ~ 2

Author(s):

Sami-Seppo Ovaska ◽

Pavel Geydt ◽

Ringaudas Rinkunas ◽

Tadeusz Lozovski ◽

Robertas Maldzius ◽

...

Keyword(s):

Surface Energy ◽

Direct Current ◽

Photoelectron Spectroscopy ◽

Rapeseed Oil ◽

Surface Composition ◽

Surface Elasticity ◽

Contact Angles ◽

Treatment Unit ◽

Barrier Coating ◽

Corona Treatment

Dispersion coating layers consisting of hydroxypropylated starch, 0–30 pph of barrier-grade talc and 0–10 pph of styrene-butadiene latex were subjected to both positive and negative direct-current corona treatments utilizing a specially developed dynamic treatment unit. The effects of the surface composition (barrier coating) on the response to the direct current corona treatment were evaluated by measuring contact angles and determining the surface energy. The effects of corona treatment on the properties of the barrier coating were further determined by measuring the contact angle of rapeseed oil and the grease resistance. It was found that the grease resistance of the corona-treated barrier coatings was substantially lower than that of untreated samples, which was ascribed to holes caused by corona discharge strike-through and to chemical changes on the treated surfaces. The corona treatment lowered the surface energy of the coatings, as indicated by an increase in the contact angles of water and rapeseed oil. Changes in the dispersion part of the surface energy were recorded, particularly after positive treatment voltage, whereas a negative discharge led to greater changes in the polar part of the surface energy. X-ray photoelectron spectroscopy (XPS) tests revealed an increase in the proportion of talc at the surface after corona treatment, which indicates a migration caused by the applied electric field. The peak force tapping mode of an atomic force microscope revealed moderate topographical changes in the coatings and a decrease in surface elasticity, supporting the migration of talc particles. In addition, significant changes in the physicochemical properties of the untreated reverse side were observed.

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UV-curable low surface energy fluorinated polycarbonate-based polyurethane dispersion

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2011.06.044 ◽

2011 ◽

Vol 362 (2) ◽

pp. 274-284 ◽

Cited By ~ 51

Author(s):

Hyeon-Deuk Hwang ◽

Hyun-Joong Kim

Keyword(s):

Surface Energy ◽

Uv Curable ◽

Polyurethane Dispersion ◽

Low Surface Energy

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Surface Segregation of Sulfur and Its Effect on Surface-Energy-Induced Selective Grain Growth in Magnetostrictive Fe-Ga-B Alloy

Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1 ◽

10.1115/smasis2008-506 ◽

2008 ◽

Author(s):

Suok-Min Na ◽

Alison B. Flatau

Keyword(s):

Surface Energy ◽

Grain Growth ◽

Photoelectron Spectroscopy ◽

Electron Spectroscopy ◽

Surface Segregation ◽

Iron Sulfide ◽

Rolling Direction ◽

X Ray ◽

Sulfur Atmosphere ◽

Xrd Patterns

The surface-energy-induced selective grain growth with a specific plane can be governed in polycrystalline Fe-Ga-B alloys doped with sulfur. The segregated sulfur during texture annealing played an important role in controlling the surface energy to induce the selective growth of {100} or {110} grains, corresponding to maximum magnetostrictive performance, along <001> orientation with respect to rolling direction. The results show that sulfur diffuses (adsorbs) from bulk interior (sulfur atmosphere) then segregates on the surface. The amount of segregated sulfur increases with an increase of annealing time at the temperature of 1200°C. Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) data on the surface as well as selective development of {100}<001> and {110}<001> preferred textures are presented in this work. The XPS fitted peaks of S 2p3/2 at binding energy of 161.2 and 163.2 eV for annealed Fe-Ga-B doped with sulfur represent the presence of stoichiometric FeS and FeSn (polysulfide), respectively. For all of the sulfur-free Fe-Ga-B sheets annealed in the ampoule with sulfur element, XPS indicated contributions centered at approximately 161.7 (S 2p) that has been assigned to iron sulfide as well. The presence of FeS was clearly confirmed by XRD patterns and XPS fitted peak positions at 161.5 eV (S 2p3/2) and 710.2 eV (Fe 2p3/2). The segregation of sulfur and boron during annealing were also confirmed by AES depth profile results, which exhibited peak concentrations of 10 at.%S and 20 at.%B at the surface, respectively. The peak magnetostriction of 201 ppm was obtained at annealed (Fe81.3Ga18.7)99B1 alloy with near {100}<001> orientation under sulfur atmosphere containing the amounts of 6.4 mg S. On the other hand, the texture of sulfur-free Fe-Ga-B alloy was close to {110}<001> after annealing at 1200°C for 6h under flowing argon, corresponding to the magnetostriction of 160 ppm.

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The Use of X-Ray Photoelectron Spectroscopy for the Study of Oral Streptococcal Cell Surfaces

Advances in Dental Research ◽

10.1177/08959374970110040301 ◽

1997 ◽

Vol 11 (4) ◽

pp. 388-394 ◽

Cited By ~ 5

Author(s):

H.C. Van Der Mei ◽

H.J. Busscher

Keyword(s):

Cell Surface ◽

Photoelectron Spectroscopy ◽

Surface Composition ◽

Cell Surface Hydrophobicity ◽

Surface Hydrophobicity ◽

Contact Angles ◽

Microbial Cell ◽

Cell Surfaces ◽

Water Contact ◽

X Ray

Physicochemical and structural properties of microbial cell surfaces play an important role in their adhesion to surfaces and are determined by the chemical composition of the outermost cell surface. Many traditional methods used to determine microbial cell wall composition require fractionation of the organisms and consequently do not yield information about the composition of the outermost cell surface. X-ray photoelectron spectroscopy (XPS) measures the elemental composition of the outermost cell surfaces of micro-organisms. The technique requires freeze-drying of the organisms, but, nevertheless, elemental surface concentration ratios of oral streptococcal cell surfaces with peritrichously arranged surface structures showed good relationships with physicochemical properties measured under physiological conditions, such as zeta potentials. Isoelectric points ap-peared to be governed by the relative abundance of oxygen- and nitrogen-containing groups on the cell surfaces. Also, the intrinsic microbial cell-surface hydrophobicity by water contact angles related to the cell-surface composition as by XPS and was highest for strains with an elevated isoelectric point. Inclusion of elemental surface compositions for tufted streptococcal strains caused deterioration of the relationships found. Interestingly, hierarchical cluster analysis on the basis of the elemental surface compositions revealed that, of 36 different streptococcal strains, only four S. rattus as well as nine S. mitis strains were located in distinct groups, well separated from the other streptococcal strains, which were all more or less mixed in one group.

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Effect of an Organically Modified Nanoclay on Low-Surface-Energy Materials of Polybenzoxazine

Macromolecular Rapid Communications ◽

10.1002/marc.200800092 ◽

2008 ◽

Vol 29 (14) ◽

pp. 1216-1220 ◽

Cited By ~ 51

Author(s):

Huei-Kuan Fu ◽

Chih-Feng Huang ◽

Shiao-Wei Kuo ◽

Han-Ching Lin ◽

Ding-Ru Yei ◽

...

Keyword(s):

Surface Energy ◽

Energy Materials ◽

Low Surface Energy ◽

Organically Modified

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Bioinspired super-hydrophobic fractal array via a facile electrochemical route: preparation and corrosion inhibition for Cu

RSC Advances ◽

10.1039/d1ra06473h ◽

2022 ◽

Vol 12 (1) ◽

pp. 265-276

Author(s):

Robert H. B. Miller ◽

Yinsha Wei ◽

Cong Ma ◽

Longyun Li ◽

Jihan Shao ◽

...

Keyword(s):

Surface Energy ◽

Corrosion Protection ◽

Corrosion Inhibition ◽

Energy Materials ◽

Hydrophobic Surfaces ◽

Low Surface Energy

Super-hydrophobic surfaces (SHS) usually are formed from a combination of low surface energy materials and micro/nanostructures via two-step approaches, and they have promising applications in material corrosion protection.

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Nonthermal Plasma Treatment Improves Uniformity and Adherence of Cyclodextrin-Based Coatings on Hydrophobic Polymer Substrates

Coatings ◽

10.3390/coatings10111056 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1056

Author(s):

Greg D. Learn ◽

Emerson J. Lai ◽

Horst A. von Recum

Keyword(s):

Surface Energy ◽

Photoelectron Spectroscopy ◽

Substrate Surface ◽

Nonthermal Plasma ◽

Energy Substrates ◽

Low Surface Energy ◽

Lap Shear ◽

Plasma Effects ◽

Coating Uniformity ◽

And Performance

Low surface energy substrates, which include many plastics and polymers, present challenges toward achieving uniform, adherent coatings, thus limiting intended coating function. These inert materials are common in various applications due to favorable bulk, despite suboptimal surface, properties. The ability to functionally coat low surface energy substrates holds broad value for uses across medicine and industry. Cyclodextrin-based materials represent an emerging, widely useful class of coatings, which have previously been explored for numerous purposes involving sustained release, enhanced sorption, and reversible reuse thereof. In this study, substrate exposure to nonthermal plasma was explored as a novel means to improve uniformity and adherence of cyclodextrin-based polyurethane coatings upon unreceptive polypropylene substrates. Plasma effects on substrates were investigated using contact angle goniometry and X-ray photoelectron spectroscopy (XPS). Plasma impact on coating uniformity was assessed through visualization directly and microscopically. Plasma effects on coating adhesion and bonding were studied with mechanical lap-shear testing and XPS, respectively. Substrate surface wettability and oxygen content increased with plasma exposure, and these modifications were associated with improved coating uniformity, adhesion, and interfacial covalent bonding. Findings demonstrate utility of, and elucidate mechanisms behind, plasma-based surface activation for improving coating uniformity, adherence, and performance on inert polymeric substrates.

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A Novel Nanoimprint Lithography Thiol-ene Resist for Sub-70 nm Nanostructures

Science of Advanced Materials ◽

10.1166/sam.2020.3721 ◽

2020 ◽

Vol 12 (6) ◽

pp. 779-783

Author(s):

Man Zhang ◽

Liang-Ping Xia ◽

Sui-Hu Dang ◽

A-Xiu Cao ◽

Qi-Ling Deng ◽

...

Keyword(s):

Surface Energy ◽

Nanoimprint Lithography ◽

Surface Oxygen ◽

High Chemical ◽

Uv Curable ◽

Oxygen Inhibition ◽

Click Polymerization ◽

Low Viscosity ◽

Low Surface Energy ◽

Chemical Etch

In this paper, we propose a novel kind of UV click-polymerization thiol-ene copolymers as nanoimprint lithography resists for sub-70 nm resolution patterns. High-precision mold imprint and release are two of the most critical steps of nanoimprint lithography, which requires the resists with properties of excellent conformal replication and low surface energy. Conventional UV-curable resists used in nanoimprint lithography, such as acrylate, epoxy resin, and vinyl ether, cannot satisfy all these properties requirements because they exhibit surface oxygen inhibition during polymerization, or materials fracture and delamination during mold releasing. A novel kind of thiol-ene copolymers have been investigated in this study, which have many properties favorable for use as nanoimprint lithography resists to imprint sub-70 nm and high-aspect-ratio nanostructures. These properties include sufficiently low viscosity and high Young's modulus, low surface energy for easy demolding, polymerization in benign ambient, and in particular, high chemical-etch resistance. These excellent properties give improve nanoimprinting results.

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