文献类型：期刊文献

英文题名：Effect of cupric ion on thermal degradation of quaternized chitosan

作者：Li, Si-Dong[1];Zhang, Chao-Hua[2];Dong, Jing-Jing[1];Ou, Chun-Yan[1];Quan, Wei-Yan[1];Yang, Lei[1];She, Xiao-Dong[1]

机构：[1]Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Coll Food Sci & Technol, Zhanjiang 524088, Peoples R China

年份：2010

卷号：81

期号：2

起止页码：182

外文期刊名：CARBOHYDRATE POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000278170400002)、、EI(收录号：20102312993293)、Scopus(收录号：2-s2.0-77953132782)、WOS

语种：英文

外文关键词：Hydroxypropyl trimethyl ammonium chloride chitosan; Cupric ion; Thermal degradation; Thermogravimetry analysis; Differential thermal analysis

外文摘要：The thermal degradation of quaternized chitosan-cupric ion compounds in nitrogen was studied by thermogravimetry analysis (TG) and differential thermal analysis (DTA). The effect of cupric ions on the thermal degradation behaviors of quaternized chitosan was discussed. Fourier transform-infrared (FTIR) and X-ray diffraction (XRD) were utilized to determine the micro-structure of quaternized chitosan-cupric ion compounds. The results of FTIR and XRD show that there are coordinating bonds between quaternized chitosan and cupric ions. Thermal analysis indicates that the thermal degradation of quaternary chitosan-cupric ion compounds is a two-stage reaction, in which there are the decomposition of N-C2 bond on the side-chain of quaternized chitosan and the cleavage of glycosidic linkages of chitosan. The two reactions are exothermic. The impact of cupric ion on the thermal degradation of quaternized chitosan is significant, and the temperature and activation energy of the degradation are related to the weight fraction of the cupric ion. (C) 2010 Elsevier Ltd. All rights reserved.