Journal
CARBOHYDRATE POLYMERS
Volume 82, Issue 4, Pages 1284-1289Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2010.07.010
Keywords
Chitosan-cobalt complex; Chitosan; Thermogravimetric analysis; Degradation mechanism; Kinetic parameter
Categories
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available