| 초록 |
Poly(N-isopropylacrylamide) (PNIPAm) has received attention because of soluble-insoluble change at its lower critical solution temperature. The transition of PNIPAm need to be accelerated because the slow transition rate has made its applications difficult. In previous study, we developed thermo-responsive film, composed of PNIPAm hydrogels with aligned pores and infiltrated polydimethylsiloxane (PDMS), deswell to 10 % of its initial volume in 12 sec. To further improve deswelling rate, PNIPAm hydrogels having various pore sizes were prepared by directional melt crystallization and subsequently infiltrated PDMS into the pores of PNIPAm. We controlled the pore sizes of PNIPAm by controlling the concentration of NIPAm solutions, and the content of PDMS phase was controlled by the pore size of PNIPAm. The deswelling rate increased as the pore size of PNIPAm decreased. As a result, we demonstrated the transition rate of PNIPAm/PDMS composite could be controlled by PDMS phase in composites. |
