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];Lam, Michael Hon-Wah[2];Ge, Xueping[3]

机构：[1]Univ Sci & Technol China, USTC CityU Joint Adv Res Ctr, Dept Polymer Sci & Engn, CAS Key Lab Soft Matter Chem, Suzhou, Peoples R China;[2]City Univ Hong Kong, USTC CityU Joint Adv Res Ctr, Dept Biol & Chem, Suzhou, Peoples R China;[3]E China Univ Sci & Technol, Sch Sci, Inst Nucl Technol & Applicat, Shanghai 200237, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000300838100071)】；

基金：The authors gratefully acknowledge the National Natural Science Foundation of China (No. 51073146, 51103143, 51173175) and Anhui Provincial Natural Science Foundation (No. 09041496, China). The work is also supported by the Fundamental Research Funds for the Central Universities (No. WK2060200005, 2010).

语种：英文

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 gamma-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 degrees. However, this film exhibits a large contact angle hysteresis (similar to 116 degrees) 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.