| 초록 |
Hydrogels are hydrophilic polymer networks having a good water uptaking property. In order to apply them to commercialization of much diverse fields, studies on hydrogels with strong physical properties are continuing. In this study, we coated poly(N-isopropylacrylamide)(PNIPAM)/poly(dimethylsiloxane)(PDMS) thin composite surface film on polyurethane. We prepared porous PNIPAM film by using a Directional Melt Crystallization (DMC) method, which crystallize solvent with forming pore walls, followed by removal of crystals. After that, we coat PNIPAM with poly(vinyl alcohol) in different thickness. Subsequently, we infiltrate PDMS into the pores of PNIPAM, and the film was fixed on the polyurethane. The structure of the composite film shows distinctive PNIPAM and PDMS phases, and the exposed PNIPAM thickness depends on coating thickness. The blend film shows rapid transition of surface structure and hydrophilicity at different temperatures. |
