分析测试学报2012，Vol.31Issue(7)：785-791,7.DOI:10.3969/j.issn.1004-4957.2012.07.005
热分析法与分子模拟技术研究芦丁的热降解机理及其分解动力学
Study on Thermal Decomposition Mechanism and Kinetics of Rutin by Thermal Analysis and Molecular Simulation
摘要
Abstract
The thermal decomposing curves of rutin in different heating speeds were obtained under dynamic conditions in nitrogen atmosphere, using non-isothermal thermogravimetric and derivative thermogravimetry methods(TG - DTG). Four thermal analysis kinetic methods, e. g. Achar, CoatsRedfem, Kissinger and Ozawa method were used to speculate the probable mechanisms of thermal decomposing reaction and the kinetic parameters. The shelflives of rutin at sevral different temperatures were calculated by the kinetic parameters of first stage. With increase of the heating rate, the thermal decomposing tempreture of rutin rose. The most probable kinetic mechanisms of the three-stage thermal decomposition were nucleation and growth, three-dimensional diffusion, nucleation and growth, which correspond to Avrami - Erofeev Equation, Z. -L -T. Equation and Avrami - Erofeev Equation, respectively. In accordance with the data of TG and Gaussian simulation, one molecule of rutin lost three oxygen atoms at the first stage of decomposition and lost ten oxygen atoms at the second stage while paraffins and one benzene ring were lost at the third stage. The shelflives of rutin at room temperature were about 1. 5 -2 years based on the apparent activation energy(Ea) and pre-exponential factor( A ) of the first stage.关键词
芦丁/热重和微分热重技术(TG-DTG)/热分解/非等温动力学/Gaussian模拟Key words
rutin/ TG-DTG/ thermal decomposition/ non-isothermal kinetics/ Gaussian simulation分类
化学化工引用本文复制引用
肖卓炳,郭满满,岳蓓茵,郭瑞轲..热分析法与分子模拟技术研究芦丁的热降解机理及其分解动力学[J].分析测试学报,2012,31(7):785-791,7.基金项目
湖南省高校“林产资源化学与林化产品开发”科技创新团队支持计划(湘教通(2010)212号) （湘教通(2010）
吉首大学研究生科研创新项目(JY201117) （JY201117）
