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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
Swelling ratios of the p(NIPAm-co-PEGDA) hydrogels: (a) with weight ratio of NIPAm and PEGDA as 1:0.25; (b) with weight ratio of NIPAm and PEGDA as 1:0.5; (c,d) swelling ratios at two different temperatures (n = 3).