林产化学与工业2017，Vol.37Issue(5)：19-27,9.DOI:10.3969/j.issn.0253-2417.2017.05.003
茶多酚热解特性及其反应机理研究
Study of Pyrolysis Behavior and Reaction Mechanism of Tea Polyphenols
摘要
Abstract
The mass change and gaseous products of pyrolysis of black tea polyphenols ( RM) and green tea polyphenols ( YS) were tested by using simultaneous thermal analyzer ( TGA/DSC ) , on-line Fourier transform infrared spectrometer ( FT-IR ) in conjunction with mass spectroscopic(MS)instrument.The chemical compositions of solid residue at different heating temperatures were also monitored , and the pyrolysis mechanism of tea polyphenols was analysed .It was observed that tea polyphenols could be classified as aromatic compounds with rich side chains , mainly consisting of C , H and O elements as well as tiny N element .The weight loss of pyrolysis below 200 ℃was essentially the result of evaporation of free water and bound water .Pyrolysis began at about 200 ℃, which could be attributed to the stability of the side chains in the chemical structure of the samples .At the temperatures between 200 and 350 ℃, tea polyphenols dramatically decompased by breaking side chains in their structure and the recombination of free radicals , leading to the generation of enormous gaseous products such as H 2 O and CO2 , etc.At the temperatures between 350 and 800 ℃, the pyrolysis reactions became sustainably slow , highlighting the generation and accumulation of more stable chemical structure containing polycyclic aromatic hydrocarbons in the pyrolysed residues .The established understanding provides the guidelines for effective utilization of tea polyphenols and the development of new application prospects in fire prevention and protection field .关键词
茶多酚/热稳定性/热解产物/反应机理/天然阻化材料Key words
tea polyphenols/thermal stability/pyrolysis product/reaction mechanism/natural oxidation inhibitor分类
化学化工引用本文复制引用
姚奉奇,陶骏骏,王海晖,胡国庆,陈帅,TAHIR Mudassir Hussian..茶多酚热解特性及其反应机理研究[J].林产化学与工业,2017,37(5):19-27,9.基金项目
中央高校基本科研业务费专项资金资助(WK2320000032) （WK2320000032）
