Thermal analysis kinetics of dioscorea saponin by mechanical activation

2018 International Conference on Civil, Architecture and Disaster Prevention

土木建筑工程

Long, Xiangli^1^2 ; Liang, Qingyan^2 ; Politov, A.^3 ; Gao, Hong^1 ; Li, Yansheng^1 ; Chen, Meiling^1

School of Material Science and Engineering, Dalian Jiaotong University, Dalian, Liaoning

116028, China^1

Guangxi Yuchai Machinery Parts Manufacturing Co. Ltd., Yulin, Guangxi

537000, China^2

Institute of Solid State Chemistry and Mechanochemistry, SB RAS, Russia^3

关键词: Accelerated decomposition;    Dioscorea nipponica;    Endothermic peaks;    Kinetic mechanism;    Mechanical activation;    Thermal decomposition activation energies;    Thermal decomposition kinetics;    Two dimensional diffusion;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/218/1/012139/pdf
DOI  :  10.1088/1755-1315/218/1/012139

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Dioscorea saponin isolated from the rhizome of Dioscorea nipponica Makino was activated by AGO mill. On the basis of TG-DSC analysis, two endothermic peak of dioscorea saponin after mechanical activation both moved back, and it had finished weightlessness in advance due to the accelerated decomposition. According to thermal analysis kinetics, the average thermal decomposition activation energy of dioscorea saponin after mechanical activation increased, and the maximum activation energy at different conversion rates moved back. According to the determining results of kinetic mechanism function, the thermal decomposition kinetics mechanism functions of dioscorea saponin before and after mechanical activation both fitted the Jander formula. After mechanical activation, the thermal decomposition kinetic mechanism of dioscorea saponin transformed from three-dimensional to two-dimensional diffusion.