文献类型：期刊文献

英文题名：Study on the thermal degradation kinetics and pyrolysis characteristics of chitosan-Zn complex

作者：Ou, Chunyan[1];Chen, Song[2];Liu, Yonghai[1];Shao, Jiangjuan[1];Li, Sidong[2];Fu, Tingming[3];Fan, Wenling[1];Zheng, Hui[1];Lu, Qin[1];Bi, Xiaolin[1]

机构：[1]Nanjing Univ Chinese Med, Sch Pharm, Nanjing 210023, Jiangsu, Peoples R China;[2]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China;[3]Jiangsu Collaborat Innovat Ctr Chinese Med Resour, Nanjing 210023, Jiangsu, Peoples R China

年份：2016

卷号：122

起止页码：268

外文期刊名：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS

收录：SCI-EXPANDED(收录号：WOS:000390496300030)、、EI(收录号：20164803067674)、Scopus(收录号：2-s2.0-84997207521)、WOS

基金：We gratefully acknowledge the financial support of National Natural Science Foundation of China (51403104, 81274095, 31271938), Natural Science Foundation of Jiangsu Province (BK20131414, BK20141465), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

语种：英文

外文关键词：Chitosan-Zn complex; Thermal degradation; Pyrolysis; Kinetic parameter; Volatile compounds

外文摘要：The thermal degradation kinetics and pyrolysis characteristics of a chitosan-Zn complex have been studied by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and pyrolysis gas-chromatography/mass spectrometry (Py-GC/MS). FTIR analysis showed that the absorptions associated with the O-H, N-H, C=O and C-C bonds shifted to lower frequencies and became much less intense at high temperatures. Furthermore, several new peaks appeared at 3049, 2332, 2202 and 600-900 cm-1 under these conditions. TGA experiments indicated that the thermal degradation of the chitosan-Zn complex occurred over two stages. The kinetic triplets of the second thermal degradation stage were estimated by Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose and Coats-Redfern methods, and the most plausible kinetic model was F-3([(1 - alpha)(-2) - 1]/2), i.e., a third-order reaction. The Py-GC/MS results indicated that the pyrolysis of the chitosan-Zn complex was very complicated, producing many volatile products, including carbon dioxide, acetic acid and nitrogen-containing aromatic heterocyclic compounds. Compared with chitosan, the decomposition of the chitosan-Zn complex was easier and more thorough. (C) 2016 Elsevier B.V. All rights reserved.