Preparation of Functional Superhydrophobic Composite Coatingsby Spray-coating and their Properties

doi:10.7517/j.issn.1674-0475.2012.05.365

Abstract

Abstract: Common engineering materials silicone BP and silica (SiO₂) dispersions synthesized by the Stöber method were used to prepare functional micro/nano rough (MNR) superhydrophobic composite coatings by spray-coating. The water contact angle of the composite coatings could reach 146.5, and the sliding angle was less than 1 (the volume of test droplet is 15 μL). The conditions of spray-coating process were discussed, and under the conditions of pH=7.78.0 and suitable silicone BP/SiO₂ mass ratio of spraying solution, the MNR composite coating could be formed, which is similar to the lotus leaf surface micro/nano hierarchical structure. The micrometer papilla sizes on the MNR composite coating surface increase with increase of the SiO₂ content. Combined with the low surface energy of silicone BP, the MNR composite coating became superhydrophobic with anti-corrosion and anti-aging properties.

Key words: spray-coating, silicone, composite coating, superhydrophobicity, micro/nano hierarchical structure, contact angle, sliding angle

CLC Number:

WANG Dong, HE Jun-hui, LIU Hong-ying. Preparation of Functional Superhydrophobic Composite Coatingsby Spray-coating and their Properties[J]. Imaging Science and Photochemistry, 2012, (5): 365-374.

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