三种糖类物质的热降解动力学研究

三种糖类物质的热降解动力学研究

戚桂斌¹,刘庆阳²,贝逸翎^1*,刘雷¹

1. 山东大学化学与化工学院，山东济南 250100; 2. 山东大学环境研究院, 山东济南 250100

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-10-24 发布日期:2006-10-24
通讯作者: 戚桂斌

Thermal degradation kinetics of three kinds of poly-saccharide

QI Gui-bin¹,LIU Qing-yang², BEI Yi-ling^1*, LIU lei¹

1. School of Chemistry and Chemical Engineering, Shandong Univ., Jinan250100;2. Environmental Research Institute, Shandong Univ., Jinan 250100, Shandong

Received:1900-01-01 Revised:1900-01-01 Online:2006-10-24 Published:2006-10-24
Contact: QI Gui-bin

摘要/Abstract

摘要： 以TGA为手段，研究了壳聚糖、β-环糊精、淀粉在氮气环境下的非等温热降解动力学，采用Owaza和Friedman方法，计算了三种物质的降解动力学活化能，并使用Coats-Redfern法计算了三种物质的反应机理函数和指前因子. 结果表明：壳聚糖、β-环糊精、淀粉降解活化能分别是147.1，129.1和148.3kJ/mol,机理函数是-ln(1-α),［-ln(1-α)］2/5和［-ln(1-α)］1/2；lnA为7.7838，8.6499和7.8688min-1.

关键词: 壳聚糖, β-环糊精, TGA降解动力学 , 淀粉

Abstract: Thermal decomposition kinetics of chitosan, β-cyclodextrin and starch were studied by using thermogravimetric analysis methodology. The degradation activation energies of chitosan, β-cyclodextrin and starch were calculated by the Ozawa and Friedman methods respectively by means of TGA in a nitrogen atmosphere. Moreover, the decomposition mechanism and pre-factor was obtained by the Coats-Redfern method. It was found that the degradation activation energies of chitosan, β-cyclodextrin and starch are 147.1，129.1 and 148.3 kJ/mol, respectively. The decomposition mechanisms and lnA are -ln(1-α), 7.7838min-1; ［-ln(1-α)］2/5, 8.6499min-1; ［-ln(1-α)］1/2, 7.8688min-1 respectively.

Key words: TGA thermal degradation kinetics , Starch, β-cyclodextrin, Chitosan

中图分类号:

O643.32

戚桂斌,刘庆阳,贝逸翎*,刘雷 . 三种糖类物质的热降解动力学研究[J]. J4, 2007, 42(7): 19-21 .

QI Gui-bin,LIU Qing-yang,BEI Yi-ling*,LIU lei . Thermal degradation kinetics of three kinds of poly-saccharide[J]. J4, 2007, 42(7): 19-21 .

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