Superhydrophobic silica films by sol–gel co-precursor method

Latthe, Sanjay S.; Imai, Hiroaki; Ganesan, V.; Rao, A. Venkateswara

doi:10.1016/j.apsusc.2009.07.113

Cited by 190 publications

(85 citation statements)

References 20 publications

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“…When one and nine layers are spin coated on the substrate, several peaks appear. The peak at 1,100 cm −1 is due to the asymmetric stretching vibration of Si-O-Si bonds in the silica nanoparticles in the thin films [31][32][33][34]. Another small peak appearing at around 800 cm is associated with Si-O-Si bond for the rocking vibration [35].…”

Section: Resultsmentioning

confidence: 99%

Fluorine Based Superhydrophobic Coatings

2012

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Superhydrophobic coatings, inspired by nature, are an emerging technology. These water repellent coatings can be used as solutions for corrosion, biofouling and even water and air drag reduction applications. In this work, synthesis of monodispersive silica nanoparticles of ~120 nm diameter has been realized via Stöber process and further functionalized using fluoroalkylsilane (FAS-17) molecules to incorporate the fluorinated groups with the silica nanoparticles in an ethanolic solution. The synthesized fluorinated silica nanoparticles have been spin coated on flat aluminum alloy, silicon and glass substrates. Functionalization of silica nanoparticles with fluorinated groups has been confirmed by Fourier Transform Infrared spectroscopy (FTIR) by showing the presence of C-F and Si-O-Si bonds. The water contact angles and surface roughness increase with the number of spin-coated thin films layers. The critical size of ~119 nm renders aluminum surface superhydrophobic with three layers of coating using as-prepared nanoparticle suspended solution. On the other hand, seven layers are required for a 50 vol.% diluted solution to achieve superhydrophobicity. In both the cases, water contact angles were more than 150°, contact angle hysteresis was less than 2° having a critical roughness value of ~0.700 µm. The fluorinated silica nanoparticle coated surfaces are also transparent and can be used as paint additives to obtain transparent coatings. OPEN ACCESSAppl. Sci. 2012, 2 454

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Section: Resultsmentioning

confidence: 99%

Fluorine Based Superhydrophobic Coatings

2012

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“…Latthe et al [38] described the synthesis of superhydrophobic silica films on glass substrates using trimethylethoxysilane as a co-precursor. The coating sol was prepared by keeping the molar ratio of tetraethoxysilane precursor, methanol and water at 1:38.6:8.68, using 2 M NH 4 OH throughout the experiments, and the molar ratio (M) of trimethylethoxysilane to tetraethoxysilane was varied from 0 to 1.1.…”

Section: Sol-gel Processmentioning

confidence: 99%

Large-area fabrication of superhydrophobic surfaces for practical applications: an overview

Xue¹,

She²,

Zhang³

et al. 2010

Science and Technology of Advanced Materials

296

184

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“…Ce modèle, basé sur Cassie-Baxter, montre clairement comment l'eau ne touche pas complètement la surface. Cela permet dont une réduction de la traînée .. 41 Figure 11 : Résultat de diminution de la traînée de Gogte et coll. [32].…”

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Revêtements nanostructurés superhydrophobes en vue d'applications en aérodynamique /

Brassard¹

2011

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Superhydrophobic silica films by sol–gel co-precursor method

Cited by 190 publications

References 20 publications

Fluorine Based Superhydrophobic Coatings

Fluorine Based Superhydrophobic Coatings

Large-area fabrication of superhydrophobic surfaces for practical applications: an overview

Revêtements nanostructurés superhydrophobes en vue d'applications en aérodynamique /

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