Preparation of dual-sensitive graft copolymer hydrogel based on N-maleoyl-chitosan and poly(N-isopropylacrylamide) by electron beam radiation

Bulletin of materials science

Han Lin¹  Jinchen Fan¹  Jie Chen¹  Fangqi Cao¹  Liming Yang¹ 

[1] Department of Chemical Engineering and Technology, Shanghai University, Baoshan, Shanghai 200444, P.R. China$$Department of Chemical Engineering and Technology, Shanghai University, Baoshan, Shanghai 200444, P.R. ChinaDepartment of Chemical Engineering and Technology, Shanghai University, Baoshan, Shanghai 200444, P.R. China$$

关键词: Chitosan;    N-isopropylacrylamide;    thermo- and pH-sensitive;    hydrogel;    EB irradiation.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown