A comparative study on the chitosan membranes prepared from glycine hydrochloride and acetic acid

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• 作者：Bomou Ma ; Xiang Li ; Aiwen Qin ; Chunju He ; ^{chunjuhe@dhu.edu.cn}
• 关键词：Chitosan membranes ; Gly· ; HCl ; Acetic acid ; Solvent
• 刊名：Carbohydrate Polymers
• 出版年：2013
• 出版时间：16 January, 2013
• 年：2013
• 卷：91
• 期：2
• 页码：477-482
• 全文大小：1075 K

文摘

In this study, glycine hydrochloride (Gly¡¤HCl) is confirmed to be a promising solvent for dissolving native chitosan and preparing regenerated chitosan membrane. As compared with the chitosan membrane prepared from traditional acetic acid, the membrane prepared from Gly¡¤HCl by dry technique shows excellent tensile strength and initial modulus, i.e. 103.8 MPa and 3.2 GPa, respectively, which is superior to any chitosan membrane and most chitosan blend membranes reported in literatures. Besides, scanning electron microscopy (SEM), wide-angle X-ray diffraction (WAXD) and Fourier transform infrared spectroscopy (FT-IR) were used to visualize the difference between the two kind of regenerated chitosan membranes. The SEM results show that the membrane prepared from Gly¡¤HCl by dry technique presents a novel structure, which ensures its high tenacity. Furthermore, the chitosan microporous membranes were also prepared using PEG as porogen.