Ultra-high hydrophobicity on the surface of nanocomposite hydrogels with a poly(n-isopropylacrylamide) / clay network
Surface wettability is one of the most important properties of all materials, since it reflects the real structure and chemical composition at the outer-most surface, and is a decisive factor in many properties. As readily expected from their compositions, soft polymeric hydrogels, which consist largely of water and a hydrophilic polymer network, are naturally hydrophilic, and their surfaces generally show very low θw. Here, we report extraordinarily high hydrophobicity, i.e. abnormally high values of θw, (e.g. 120°), observed at the cross-sectional surfaces of nanocomposite hydrogels (NC gels) consisting of poly(N-isopropylacrylamide) (PNIPA) /clay network. Also, characteristic surface properties such as the reversible change of θw by altering the circumstances and their stability are discussed.
HARAGUCHI Kazutoshi LI Huan-jun
Material Chemistry Laboratory, Kawamura Institute of Chemical Research,631 Sakado, Sakura, Chiba 285-0078, Japan
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
1009-1012
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）