文献类型：期刊文献

英文题名：Thermal degradation kinetics of chitosan-cobalt complex as studied by thermogravimetric analysis

作者：Ou, Chun-Yan[1];Zhang, Chao-Hua[2];Li, Si-Dong[1];Yang, Lei[1];Dong, Jing-Jing[1];Mo, Xue-Liu[1];Zeng, Mu-Ting[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：82

期号：4

起止页码：1284

外文期刊名：CARBOHYDRATE POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000283042100036)、、EI(收录号：20103713231604)、Scopus(收录号：2-s2.0-77956468426)、WOS

语种：英文

外文关键词：Chitosan-cobalt complex; Chitosan; Thermogravimetric analysis; Degradation mechanism; Kinetic parameter

外文摘要：The thermal degradation of chitosan-cobalt complex at different heating rates in nitrogen was studied by thermogravimetric analysis (TGA) in the temperature range 30-800 degrees C. Fourier transform-infrared (FTIR) and X-ray diffractogram (XRD) analyses were utilized to determine the micro-structure of chitosan-cobalt complex. The results indicate that the thermal degradation of chitosan-cobalt complex in nitrogen is a two-step reaction, characteristic temperatures and the maximum reaction rate of thermal degradation increase with the increment of heating rate. The kinetic parameters were determined by using Friedman and Flynn-Wall-Ozawa methods. Coats-Redfern method was used to discuss the probable degradation mechanism. The results show that activation energy of the complex resulting from two kinetic methods has similar variable tendency, and the solid-state decomposition in the first degradation stage, which is non-spontaneous, goes to a mechanism involving nucleation and growth, Avrami-Erofeev function (A(4)) with integral form [-In(1-alpha)](4). (C) 2010 Elsevier Ltd. All rights reserved.