Fast responsive poly(N-sopropylacrylamide) hydrogels prepared by γ-ray irradiation

Abstract

γ-ray irradiation of N-isopropylacrylamide (NIPAAm) monomer. solution resulted in the formation of the opaque poly (N-isopropylacrylamide) (PNIPAAm) gel having a microporous structure. The thermo-responsive properties of the microporous gel were the same as that of a homogeneous gel prepared by conventional methods. The gel swelled below and shrunk above the lower critical solution temperature (LCST) (33 °C). The rapid and reversible volume change was observed by changing temperature.