Abstract
A new poly(N-isopropylacrylamide) (PNIPA) hydrogel was prepared by decreasing the temperature of polymerization/crosslinking reaction below the freezing point (-18 °C). This PNIPA hydrogel shows a large swelling ratio at room temperature and exhibits a fast deswelling and reswelling rate in response to external temperature changes. These properties are attributed to the macroporous and regularly arranged network of this PNIPA hydrogel.
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