Preparation and characterization of N-isopropylacrylamide/carboxymethylated chitosan hydrogel

• Published in: Journal of Shanghai University Vol. 14; no. 2; pp. 106 - 110
• Main Author: 杨黎明 陈捷 王胜
• Format: Journal Article
• Language: English
• Published: Heidelberg Shanghai University Press 01.04.2010; Department of Chemical Engineering and Technology,School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,P.R.China
• Subjects: Classical Mechanics; Engineering; Environment; Life Sciences; Materials Science; Mathematical and Computational Engineering; Mechatronics; NIPAAm; PNIPAAM; 低临界溶液温度; 异丙基丙烯酰胺; 碱性条件; 羧甲基壳聚糖; 高分子水凝胶; pH-sensitive; carboxymethylated chitosan (CMCH); hydrogel temperature-sensitive; isopropylacrylamide (NIPAAm); N-isopropylacrylamide(NIPAAm); carboxymethylated chitosan(CMCH)
• ISSN: 1007-6417; 1863-236X
• DOI: 10.1007/s11741-010-0206-1

Poly （N-isopropylacrylamide） （PNIPAAm）/carboxymethylated chitosan （CMCH） hydrogels were prepared by irradiating the aqueous solution mixture of NIPAAm and CMCH by 60 Co γ-ray.The effects of feed ratio of NIPAAm and CMCH,temperature,pH and ionic strength on the swelling ratio of PNIPAAm/CMCH hydrogels were studied.The results show that the addition of CMCH shifts the lower critical solution temperature （LCST） of the PNIPAAm hydrogel to higher temperature.The PNIPAAm/CMCH hydrogel displays not only pH-and thermo-sensitivity,but also ion-sensitivity.Differential scanning calorimetry （DSC） was applied for the determination of the LCST of the hydrogel.