文献类型：期刊文献

英文题名：Semitransparent, durable superhydrophobic polydimethylsiloxane/SiO2 nanocomposite coatings on varnished wood

作者：Tu, Kunkun[1] Kong, Lizhuo[1] Wang, Xiaoqing[1] Liu, Junliang[1]

第一作者：Tu, Kunkun

通信作者：Wang, Xiaoqing|[a0005153c01f1fe96d0f8]王小青;

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China

年份：2016

卷号：70

期号：11

起止页码：1039-1045

外文期刊名：Holzforschung

收录：EI(收录号：20164502991553);Scopus(收录号：2-s2.0-84994193818)

语种：英文

外文关键词：Nanocomposites - Silica nanoparticles - Surface roughness - Microstructure - Coatings - Mechanical stability - Wetting - Hydrophobicity - Silicones - Wood - Water absorption - Microchannels

摘要：A superhydrophobic surface on wood can prevent water adhesion and absorption. However, the practical applications of such a non-wetting surface are hindered by the fragility of the microscopic roughness features that are essential for superhydrophobicity. In this study, semitransparent, mechanically durable superhydrophobic coating was successfully deposited on varnished wood via a simple dip-coating method based on polydimethysiloxane (PDMS)/silica (SiO2) nanocomposites. The surface microstructure and roughness of the hybrid coatings on wood are governed by the mass ratio of SiO2 to PDMS. When the nano-SiO2 particle content reaches a critical level, dual-scale features with micro-scale roughness superimposed with a nanostructure can be formed in the surface coatings, resulting in excellent water-repellency with a contact angle above 150° and a sliding angle below 10°. The coated wood surface maintained essentially the original colour and aesthetic appearance despite slightly declined optical transparency of the hybrid coating caused by aggregation of silica nanoparticles. Sandpaper abrasion tests revealed that the superhydrophobic PDMS/SiO2 hybrid coating on wood retained its microstructure and superhydrophobicity after being repeatedly abraded. ? 2016 Walter de Gruyter GmbH, Berlin/Boston.