Fast responsive and strong swelling hydrogels based on N-isopropylacrylamide with sodium acrylate

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...

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Bibliographic Details
Published in:Journal of applied polymer science 2009-04, Vol.112 (1), p.123-128
Main Authors: Huang, He, Zhang, Dan, Mao, Zhiping, Yu, Weidong, Yan, Haojing
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
fast responsive
hydrogels
Organic polymers
Physicochemistry of polymers
poly(N-isopropylacrylamide-co-sodium acrylate)
Properties and characterization
Solution and gel properties
strong swellability
swelling behavior
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Summary: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.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.28457