Preparation and Characterization of pH-sensitive Hydrogel Film of Chitosan/Poly(acrylic acid) Copolymer |
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| Authors: | Liming Yang Lili Shi Jie Chen Yong Pei Feng Zhu Yiben Xia |
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| Institution: | 1. Department of Chemical Engineering and Technology, Shanghai University (Jiading Campus), Shanghai 201800, China;2. School of Material Science and Engineering, Shanghai University, Shanghai 200072, China |
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| Abstract: | A hydrogel film of chitosan/poly(acrylic acid) (CS/PAAc) copolymer with the property of pH sensitivity, was prepared by irradiating the chitosan film, which was then swelled by aqueous AAc solutions of different concentrations. The effects of the feed ratio of chitosan and AAc on the properties of the hydrogels, such as swelling ratio and pH-sensitivity, were determined. Fourier transform infrared (FT-IR) spectroscopy was applied in the attenuated total reflectance (ATR) mode for analyzing the structure change of the hydrogels after the treatment in buffer solutions of different pHs. |
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| Keywords: | chitosan hydrogel pH-sensitivity poly(acrylic acid) |
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