首页|Preparation and characterization of N-isopropylacrylamide/carboxymethylated chitosan hydrogel

Preparation and characterization of N-isopropylacrylamide/carboxymethylated chitosan hydrogel

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Poly(N-isopropylacrytamide)(PNIPAAm)/carboxymethylated chitosan(CMCH)hydrogels were prepared by irradiating the aqueous solution mixture of NIPAAm and CMCH by 60Co γ-ay.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.

carboxymethylated chitosan(CMCH)N-isopropylacrylamide(NIPAAm)hydrogel temperature-sensitivepH-sensitive

YANG Li-ming、CHEN Jie、WANG Sheng

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Department of Chemical Engineering and Technology,School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,P.R.China

Shanghai Nano-material Project FoundationShanghai Leading Academic Discipline Project

0452NM024T0105

2010

10.1007/s11741-010-0206-1

上海大学学报(英文版)
上海大学

上海大学学报(英文版)

影响因子：0.196
ISSN：1007-6417
年,卷(期)：2010.14(2)
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