| 초록 |
Poly(N-isopropylacrylamide)(PNIPAM) is a kind of hydrogel having hydrophilic polymer networks. PNIPAM has unique LCST properties which can be used in diverse fields. However, their poor physical properties are major obstacles to apply in commercialization. In this study, we prepared porous PNIPAM film by using a Directional Melting Ccrystallization (DMC) method which form directional solvent crystals. After that, we removed solvent crystals and infiltrate polydimethylsiloxane (PDMS)PDMS into the pores of PNIPAM. Finally, PNIPAM film was fixed on the PU. We controlled exposed PNIPAM phase with different thickness of poly(vinyl alcohol) coating. The structure of the composite film shows distinctive PNIPAM and PDMS regions and different exposed PNIPAM thicknesses depends on different coating thicknesses. PNIPAM/PDMS cComposite film shows a rapid transition of surface structure and hydrophilicity in differentdepending on temperature. |
