| 초록 |
Poly(N-isopropylacrylamide) (PNIPAm) is an attractive stimulus-sensitive polymer that exhibits a unique soluble-insoluble change at lower critical solution temperature. The transition of PNIPAm need to be accelerated because the current slow transition speed has made its applications difficult. In our previous study, we developed thermo-responsive film, composed of PNIPAm hydrogels with aligned micropores and infiltrated PDMS, could de-swell to 10 % of its initial volume in 12 sec. To improve deswelling rate further, we fabricated PNIPAm hydrogel having various pore sizes and subsequently infiltrated PDMS into the porous PNIPAm. The pore sizes of PNIPAm were adjusted by using three different NIPAm solutions and the content of PDMS phase in composite was controlled by the pore size of PNIPAm. The deswelling rate increased as the pore size of PNIPAm decreased. As a result, we demonstrated that the transition rate of PNIPAm/PDMS composite could be controlled by PDMS phase in composites. |
