Hybrid Materials of Polymer Gels with Surfactants

1 Introduction Polymer gels have been extensively studied[1～17] since the discovery of volume phase-transition of a gel by Tanaka[1～5]. As a unique soft material, gels attract much attention and are tried to be applied for drug-delivery systgems[6], actuators or chemo-mechanical devices[7～9] and so on. In particular, controlled-release of small molecules from a gel is now a subject of special interest[10].