Fast responsive and strong swelling hydrogels based on N‐isopropylacrylamide with sodium acrylate |
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| Authors: | He Huang Dan Zhang Zhiping Mao Weidong Yu Haojing Yan |
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| Affiliation: | 1. Textile Material and Technology Laboratory, College of Textiles, Donghua University, Shanghai 201620, People's Republic of China;2. Key Laboratory of Science and Technology of Eco‐textile, Ministry of Education, Donghua University, Shanghai 201620, People's Republic of China;3. Textiles and Materials College, Wuhan University of Science and Technology, Wuhan 430081,People's Republic of China;4. College of Textile, Donghua University, Shanghai 201620, People's Republic of China |
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| Abstract: | Poly(N‐isopropylacrylamide‐co‐sodium acrylate) gels with N,N‐methylene bisacrylamde (BIS) as crosslinker were prepared by free radical polymerization method at the temperature of 35°C, which was just around the lower critical solution temperature (LSCT) of the hydrogels. The gels synthesized at 35°C demonstrated strong swellability and fast responseability when compared with the gels synthesized at the temperature of 0 and 18°C (below the LCST) and 50 and 80°C (above the LSCT). The response rate and swelling behavior of poly(N‐isopropylacrylamide‐co‐sodium acrylate) gels was investigated and characterized by the temperature‐dependent swelling ratio and swelling and deswelling kinetics. The swelling behavior of the gels indicated that the synthesis temperature was the main factor when the swellability concerned and also had effect on the responseability of the resulting hydrogels. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 |
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| Keywords: | poly(N‐isopropylacrylamide‐co‐sodium acrylate) hydrogels swelling behavior fast responsive strong swellability |
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