Reply to the letter from T. Watanabe

Nakajima, Shigeo; Santo, Yoko

doi:10.1007/s00467-004-1604-z

Cited by 16 publications

(18 citation statements)

References 1 publication

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“…[23][24][25] The chemical groups with low surface energies have the decreasing order of cCH 2 > cCF 2 > cCF 3 . 50 Even though the lowest surface energy of 6.7 mJ/m 2 was obtained for regularly aligned closesthexagonal-packed CF 3 groups, 51 water contact angle on a surface of this material was below 1208. Therefore, we suggest that the interactions of water molecules with low surface energy CF 2 and CF 3 groups contributed to the hydrophobicity observed.…”

Section: Hydrophobicitymentioning

confidence: 96%

Tuning hydrophobicity of a fluorinated terpolymer in differently assembled thin films

Sheets

Welch

et al. 2017

J. Polym. Sci. Part B: Polym. Phys.

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In the current report, casting from good solvent (acetone) and casting from mixed solvent and nonsolvent were employed for preparing thin films of terpolymer of Tetrafluoroethylene (TFE), Hexafluoropropylene (HFP), and Vinylidene fluoride (VDF) (THV), on silicon wafers. These films revealed various morphologies and wetting behaviors depending on the solution concentration, temperature, and thin film preparation method. The THV thin films prepared by casting from good solvent showed smooth morphology with holes. The thin film prepared from a 3 wt % THV/acetone solution by casting from good solvent at 15 °C demonstrated spheres in addition to the smooth morphology, while the thin film prepared from a 5 wt % THV/acetone solution at 15 °C by casting from good solvent had a mesh‐like structure with some linked spheres. Casting the thin films from mixed solvent and nonsolvent resulted in various morphologies such as different sphere sizes embedded in a dense film layer, and hexagonal close packed structures. The thin films prepared by casting from good solvent showed a slightly hydrophobic character, with a measured water contact angle of approximately 99°, while the nonsolvent cast films had a water contact angle as high as 145°. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 643–657

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Section: Hydrophobicitymentioning

confidence: 96%

Tuning hydrophobicity of a fluorinated terpolymer in differently assembled thin films

Sheets

Welch

et al. 2017

J. Polym. Sci. Part B: Polym. Phys.

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“…The superhydrophobic property is controlled both by its chemical nature and surface topography or roughness. [5,6] The surface features (i.e. surface roughness) associated with hydrophobicity are typically light scattering, thereby making such surfaces to appear as opaque or translucent.…”

Section: Introductionmentioning

confidence: 99%

Transparent hydrophobic and superhydrophobic coatings fabricated using polyamide 12–SiO₂ nanocomposite

Prasad

Chakradhar

Bera

et al. 2016

Surface & Interface Analysis

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Optically transparent hydrophobic and superhydrophobic coatings have been prepared using polyamide 12–SiO2 nanocomposite (NC) on glass substrates by the spin‐coating method. The coatings have been optimized for their hydrophobicity and transparency. The transformation from hydrophobic to superhydrophobic is achieved with increase in roughness (Ra) which increases with SiO2 content. These coatings are highly transparent in the entire visible region (400–800 nm). The influence of layer thickness on water contact angle (WCA) and optical transmittance of the coatings has been studied. Field emission scanning electron micrograph (FESEM) shows the presence of SiO2 nanoparticles covered with polyamide homogenously on the surface and the particles are aggregated to form a rough structure. X‐ray diffraction (XRD) patterns show that the polyamide losses its crystalline structure in the composite. The preparation procedure reported here is simple and eco‐friendly. The dual nature of the coatings, that is, high transparency and superhydrophobicity in the entire visible region suggests for its potential usage in self‐cleanings, wind screen and optoelectronic applications. Copyright © 2016 John Wiley & Sons, Ltd.

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“…To understand this, one should keep in mind that many insects, some plants and snails have developed remarkable properties such as super-hydrophobicity, ultra-low adhesion and self-cleaning membrane structures to protect them from environmental contaminates. [25] In our study, coating animal hairs with spherical PANI formed an irregular rough surface that renders them hydrophobic, [45] though it also well known that PANI itself works as an antistatic material due to its inherent conductivity. [46] Dried PANI nano-microspheres themselves have high hydrophobicity because they can dissolve in not distilled water but ethyl acetate (Supporting Figure S7).…”

mentioning

confidence: 61%

Bioinspired Polyaniline‐Functional Natural Hairs for Pollen Protection

Chechetka

Miyako

2016

ChemistrySelect

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Self‐assembled polyaniline nano‐microspheres with a low cytotoxicity were synthesized by a simple temperature controlling method and uniformly distributed on animal hairs that had been chemically functionalized with 4‐aminothiophenol. The resulting hybrid hairs were found to exhibit unique characteristics that help reduce the adhesion of natural pollen grains and spores. This new type of natural hybrid material shows great promise for the development of anti‐pollen fiber products capable of protecting against many different types of environmental pollutant.

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Reply to the letter from T. Watanabe

Cited by 16 publications

References 1 publication

Tuning hydrophobicity of a fluorinated terpolymer in differently assembled thin films

Tuning hydrophobicity of a fluorinated terpolymer in differently assembled thin films

Transparent hydrophobic and superhydrophobic coatings fabricated using polyamide 12–SiO₂ nanocomposite

Bioinspired Polyaniline‐Functional Natural Hairs for Pollen Protection

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Reply to the letter from T. Watanabe

Cited by 16 publications

References 1 publication

Tuning hydrophobicity of a fluorinated terpolymer in differently assembled thin films

Tuning hydrophobicity of a fluorinated terpolymer in differently assembled thin films

Transparent hydrophobic and superhydrophobic coatings fabricated using polyamide 12–SiO2 nanocomposite

Bioinspired Polyaniline‐Functional Natural Hairs for Pollen Protection

Contact Info

Product

Resources

About

Transparent hydrophobic and superhydrophobic coatings fabricated using polyamide 12–SiO₂ nanocomposite