2005•Macromolecular SymposiaRequires access

Preparation and Characterization of pH‐sensitive Hydrogel Film of Chitosan/Poly(acrylic acid) Copolymer

Liming Yang, Lili Shi, Jie Chen, Yong Pei, Feng Zhu, Yiben Xia

Abstract

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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Key concepts: Chitosan, Copolymer, Self-healing hydrogels, Acrylic acid, Swelling, Attenuated total reflection, Fourier transform infrared spectroscopy, Materials science