Design of a Transparent Hydrophobic Coating

Nakajima, Akira

doi:10.2109/jcersj.112.533

Cited by 117 publications

(64 citation statements)

References 77 publications

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“…Indeed, superhydrophobic surfaces (water contact angle θ > 150º) have shown promising antiicing performance [6]. A variety of methods have been used to fabricate superhydrophobic surfaces [7][8][9][10][11][12]. There are two main approaches to generate superhydrophobic surfaces: (i) creation of a rough surface from low surface energy materials and (ii) creation of a rough surface followed by a low surface energy material coating step.…”

Section: Introductionmentioning

confidence: 99%

“…Anodic aluminum oxide has been proposed as a suitable industrial process for use in the burgeoning field of nanotechnology [21] for developing nano-pore structure films with advantage of improvement of corrosion and wear resistance [22][23][24]. Low surface energy coatings can be produced by deposition of low surfaceenergy materials such as fluorocarbons and silicones precursors [8,10,25].…”

Section: Introductionmentioning

confidence: 99%

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Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Jafari

Menini

Farzaneh

2010

Applied Surface Science

194

110

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A superhydrophobic and icephobic surface were investigated on aluminum alloy substrate.Anodizing was used first to create a micro-nano structured aluminum oxide underlayer on the alloy substrate. In a second step, the rough surface was coated with RF-sputtered polytetrafluoroethylene (PTFE or Teflon®). Scanning electron microscopy images showed a "bird's nest"-like structure on the anodized surface. The RF-sputtered PTFE coating exhibited a high static contact angle of ~ 165º with a very low contact angle hysteresis of ~ 3º. X-ray photoelectron spectroscopy (XPS) results showed high quantities of CF 3 and CF 2 groups, which are responsible for the hydrophobic behavior of the coatings. The performance of this superhydrophobic film was studied under atmospheric icing conditions. These results showed that on superhydrophobic surfaces ice adhesion strength was 3.5 times lower than on the polished aluminum substrate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Jafari

Menini

Farzaneh

2010

Applied Surface Science

194

110

View full text Add to dashboard Cite

show abstract

“…20) Lefevre et al 21) revealed that immersion of £ -alumina in water for long durations engenders formation of bayerite [¢-Al(OH) 3 ]. It is known that gibbsite readily dissolves at moderate hydroxide concentrations and moderate temperatures, while boehmite dissolution requires more rigorous conditions and generally is kinetically slow.…”

Section: Formation Process Of Flowerlike Aluminamentioning

confidence: 99%

“…For example, wettability of solid surfaces with liquids is governed not only by the chemical properties but also the microstructure of the surfaces, 3) and a hydrophobic surface with small roughness often shows superhydrophobic property. Reflection of surface is also affected by the surface roughness.…”

Section: Introductionmentioning

confidence: 99%

Surface morphology control of thin films prepared by solution processes and its application

Tadanaga

2013

J. Ceram. Soc. Japan

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Surface morphology of materials brings various new properties to the surface, and thus, the control of the surface morphology is very important. In this paper, surface morphology control of solgel derived films using several processes has been reviewed. Hot water treatment (bottom up process), combination of UV-irradiation and chemical etching (top down process), and micropattern formation using a hydrophobic-hydrophilic patterned surface were reported.

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“…Consequently, the synthesis of fluorinated acrylic * E-mail: dytang@hit.edu.cn polymers, especially the synthesis of those with fluoroalkyl side chains, has attracted extensive interest for their unique properties and wide applications [12][13][14]. However, hydrophobicity and transparency are competitive properties from the viewpoint of surface roughness, which leads to extensive scattering of propagated light [15]. Thus, the sacrifice of transparency of the films by the introduction of fluorine into the structures restricts many applications of such hydrophobic materials for industrial usages, such as anti-wetting, antisnow (ice), adherence, anti-rusting, and reduced friction resistance [16,17].…”

Section: Introductionmentioning

confidence: 99%

Transparent fluorinate acrylic polyurethane with hydrophobicity obtained by crosslinking of hydroxyl-containing fluoroacrylate copolymer with HDI trimer

Guo

Tang

Yang

2015

Materials Science-Poland

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Hydroxyl-containing fluoroacrylate copolymers with different fluorine and hydroxyl concentrations were synthesized via free-radical solution polymerization. Transparent fluorinated polyurethane (FPU) films were prepared by curing the copolymers with HDI (hexamethylene diisocyanate) trimer. The Fourier transform infrared spectroscopy (FT-IR) results revealed introduction of fluorine both into the copolymer and polyurethane. X-ray photoelectron spectroscopy (XPS) analyses indicated that a gradient concentration of fluorine existed in the depth profile of the fluorinated polyurethane films. The highest contact angle (CA) was obtained for the FPU film with fluoroacrylate monomer concentration of 22 wt.% because of fluorine present on the film surface. The surface topographies detected by SEM and AFM indicated that surface roughness contributed little to the film hydrophobicity. By increasing the fluoroacrylate monomer concentration, the decreasing of crosslinking degree of hard segment resulted in lowering the first degradation temperature, while more C-F groups in soft segment led to higher second degradation temperature. UV-Vis spectrophotometer measurements indicated that the FPU film with the fluoroacrylate monomer concentration of 16 wt.% still had a high transmittance of more than 90 % in the whole visible wavelength range.

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Design of a Transparent Hydrophobic Coating

Cited by 117 publications

References 77 publications

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Superhydrophobic and icephobic surfaces prepared by RF-sputtered polytetrafluoroethylene coatings

Surface morphology control of thin films prepared by solution processes and its application

Transparent fluorinate acrylic polyurethane with hydrophobicity obtained by crosslinking of hydroxyl-containing fluoroacrylate copolymer with HDI trimer

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