ABSTRACT
LILI SHI, LIMING YANG, JIE CHEN *, YONG PEI, MIN CHEN, BAOJUN HUI and JIAN LI Department of Chemical Engineering and Technology, School of Environmental and Chemical Engineering, Shanghai University (Jiading Campus), Jiading, Shanghai 201800, China
Received 26 September 2003; accepted 29 December 2003
Abstract-A pH-sensitive co-polymer hydrogel of chitosan/poly(acrylic acid) (CS/PAAc) was prepared by irradiating the aqueous solution mixture of chitosan and acrylic acid with 60Co y-ray irradiation. The effect of the composition of chitosan and A Ac on the properties of the hydrogel, such as swelling ratio and pH-sensitivity, were determined. Fourier Transform Infrared (FT-IR) spectrometry was applied in the attenuated total reflectance (ATR) mode for analyzing the structure change of the hydrogels after the treatment in different pH buffer solutions.
