天然产物研究与开发2012，Vol.24Issue(8)：1026-1030,1046,6.
槲皮素的热降解机理及其分解动力学研究
Thermal Decomposition Mechanism and Kinetics of Quercetin
摘要
Abstract
Thermal decomposing curves of quercetin in different heating rates were obtained in the nitrogen atmosphere by TG-DTG technique. Four thermal analysis kinetic methods (Achar,Coats-Redfern,Kissinger and Ozawa) were used to speculate the probable mechanism of thermal decomposing reaction and the kinetic parameters. The shelflife of quercetin at room temperature was calculated by the kinetic parameters of the first stage. With the improvement of the heating rate,thermal decomposing tempreture of quercetin rose. The most probable kinetic mechanisms of the two-stage thermal decomposition were nucleation and growth and chemical reactions,corresponding with Avrami-Erofeev Equation and Reaction Order. In accordance with the data of TG and Gaussian, one molecule of quercetin lost two oxygen atoms at the first stage of decomposition and lost one benzene ring at the second stage. The shelflife of quercetin at room temperature was about 1.5-2 years based on the apparent activation energy (Ea) and pre-exponential factor (A) of the first stage.关键词
槲皮素/TG-DTG/热分解/非等温动力学/Gaussian模拟Key words
quercetin/TG-DTG/thermal decomposition/non-isothermal kinetics/Gaussian simulation分类
化学化工引用本文复制引用
郭满满,肖卓炳,彭密军,于华忠,郭瑞轲..槲皮素的热降解机理及其分解动力学研究[J].天然产物研究与开发,2012,24(8):1026-1030,1046,6.基金项目
国家科技部项目(2009D20110440) （2009D20110440）
湖南省自然科学基金资助项目(10JJ6024) （10JJ6024）
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(JGY201117) （JGY201117）
