Journal
POLYMER
Volume 50, Issue 13, Pages 2836-2840Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2009.04.032
Keywords
Diels-Alder hydrogels; Gelation; Water-accelerating effect
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Funding
- National Natural Science Foundation of China [50773018]
- Education Department of Henan Province [2008A430003]
- Zhengzhou Science and Technology Bureau
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Novel thermosensitive hydrogels have been synthesized by aqueous Diels-Alder reaction of poly(N,N-dimethylacrylamide-co-furfuryl methacrylate) and N-[4-(formyl polyethylene glycol ester) bismaleimide. The gelation time was measured by a via] inversion method and the swelling behavior of dried hydrogel was studied by a general gravimetric method. It was found that water can accelerate Diels-Alder reaction while DMF can accelerate retro-Diels-Alder reaction. The gelation time decreases with the increase of temperature. Swelling/shrinking kinetics indicates that the as-prepared hydrogels have high swelling ratio and can respond to temperature. The strategy described here provides several advantages for the hydrogel formation including mild reaction conditions, no initiator or catalyzer, no organic solvent, tunable gelation rate, and thermal reversibility. (C) 2009 Elsevier Ltd. All rights reserved.
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