Abstract
To improve the temperature sensitivity of conventional poly(N-isopropylacrylamide) (PNIPA) hydrogel, a lyotropic liquid crystal based on polyoxyethylene 20 cetyl ether (Brij58,C16E20) was used as template to prepare nanostructured hydrogel. The structure, morphology, swelling behaviour and temperature sensitivity of confined PNIPA hydrogel were characterised. The prepared hydrogels presented honeycomb structure and rapid swelling rate. The time for losing water was greatly shortened. The thermal response measured by differential scanning calorimeters was improved markedly. Finally, as for oscillatory swelling/deswelling behaviours, rapid recovery was observed on alternating temperature from 20 to 37°C.
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