文献类型：期刊文献

英文题名：Fabrication of raspberry SiO2/polystyrene particles and superhydrophobic particulate film with high adhesive force

作者：Xu, Dezhi[1,2]; Wang, Mozhen[1]; Ge, Xuewu[1]; Hon-Wah Lam, Michael[2]; Ge, Xueping[3]

机构：[1] Department of Polymer Science and Engineering, USTC-CityU Joint Advanced Research Centre, University of Science and Technology of China, Suzhou, China; [2] Department of Biology and Chemistry, City University of Hong Kong, USTC-CityU Joint Advanced Research Centre, Suzhou, China; [3] Institute of Nuclear Technology and Application, School of Science, East China University of Science and Technology, Shanghai, China

年份：2012

卷号：22

期号：12

起止页码：5784

外文期刊名：Journal of Materials Chemistry

收录：EI(收录号：20121014832910)

语种：英文

外文关键词：Contact angle - Hydrophobicity - Polymerization - Styrene - Gamma rays - Atomic force microscopy - Scanning electron microscopy - Glass substrates - Fabrication

摘要：We report a facile and novel strategy on the fabrication of well-defined raspberry SiO2/polystyrene (SiO2/PS) particles via radiation miniemulsion polymerization. Starting from methacryloxypropyltrimethoxysilane (MPS)-functionalized SiO2 particles (176 nm), raspberry SiO2/PS particles (257 nm) with a submicron SiO2 core decorated by nano-sized PS latex particles (58 nm) are obtained after γ-ray induced miniemulsion polymerization of styrene (St). It is found that MPS grafted density on the surface of submicron SiO2 particles, the weight ratio of St to SiO2 particles (WSt/o-SiO2), as well as the surfactant concentration will affect the morphology and wettability of the resultant SiO2/PS hybrid particles. When the well-defined raspberry SiO2/PS particles are deposited on a blank glass substrate, a dual-size roughness surface topology was observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). This film has a static water contact angle as high as 151°. However, this film exhibits a large contact angle hysteresis (～116°) and strong adhesion to water. Furthermore, this kind of superhydrophobic particulate film can be used as a "mechanical hand" for transportation of small water droplets without loss, thus it may have potential applications in industrial fields. ? The Royal Society of Chemistry 2012.