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Preparation of dual-sensitive graft copolymer hydrogel based on N-maleoyl-chitosan and poly(N-isopropylacrylamide) by electron beam radiation
Jinchen Fan Jie Chen Liming Yang Han Lin Fangqi Cao
Polymers Volume 32 Issue 5 October 2009 pp 521-526
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Keywords
Chitosan ;N-isopropylacrylamide ;thermo- and pH-sensitive ;hydrogel ;EB irradiation. -
Abstract
Organic solvent-soluble N-maleoyl-chitosan (NMCS) was synthesized by reaction of chitosan with maleic anhydride (MAH) in N,N-dimethylformamide (DMF). N-maleoyl-chitosan-graft-poly(N-isopropylacrylamide) (NMCS-g-PNIPAAm) copolymer hydrogel was prepared via free radical polymerization by electron beam (EB) irradiation. The copolymer obtained was analysed by FT–IR, XRD and thermal gravimetric analysis (TGA). It was found that the grafting yield and grafting efficiency increased with increasing radiation absorbed dose and monomer amount, and then decreased. The swelling ratio of the copolymer hydrogel was low at pH 4–5, and LCST of the hydrogel was around 32°C.
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Author Affiliations
Jinchen Fan1 Jie Chen1 Liming Yang1 Han Lin1 Fangqi Cao1
- Department of Chemical Engineering and Technology, Shanghai University, Baoshan, Shanghai 200444, P.R. China
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Dates
- Published
- October 2009
- Manuscript received
- 5 September 2008
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