热塑性木薯淀粉/SiO_2复合材料的热降解动力学  

Thermal Degradation Kinetics of Thermoplastic Cassava Starch/Silica Composites

作　　者：刘钰馨[1] 范丽兰[1] 吴傲[1] 莫羡忠[1] 杨芳[1] 庞锦英[1] Liu Yuxin Fan Lilan Wu Ao Mo Xianzhong Yang Fang Pang Jinying(College of Chemistry and Materials Science,Guangxi Teachers Education University,Nanning, Guangxi, 530001)

机构地区：[1]广西师范学院化学与材料科学学院,广西南宁530001

出　　处：《现代塑料加工应用》2017年第4期5-8,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金项目(51663002);广西自然科学基金项目(2014GXNSFBA118248)

摘　　要：通过熔融共混法制备热塑性木薯淀粉(TPS)/二氧化硅(SiO_2)复合材料,利用热失重分析(TG)方法研究TPS/SiO_2复合材料的热降解温度及热降解动力学。结果表明,随着升温速率增加或加入SiO_2后,TPS/SiO_2复合材料的热降解温度增加。利用Kissinger方法对TPS/SiO_2复合材料热降解动力学进行研究,发现未添加SiO_2时TPS热降解活化能为206.90 kJ/mol;当添加2份SiO_2时,TPS/SiO_2复合材料热降解活化能提高到223.41kJ/mol;添加亲水SiO_2后TPS/SiO_2复合材料的热降解活化能高于添加疏水SiO_2的。采用Flynn-Wall-Ozawa方法发现,随着SiO_2的加入,TPS/SiO_2复合材料的热降解活化能增加。The thermoplastic cassava starch （TPS）/silica （Si02） composites were prepared by melt blending method,and thermal degradation temperature and thermal degradation kinetics of the TPS/SiO2 composites were studied by thermogravimetric analyzer （TG） method. The results indicate that the thermal degradation temperature of the TPS/ SiO2 composites increases with the increase of heating rate or the addition of SiO2. The thermal degradation kinetics of TPS/SiO2 composites was studied by using Kissinger method. It is found that thermal degradation activation energy of TPS is 206.90 kJ/mol, and thermal degradation activation energy of the TPS/SiO2 composites with 2 phr SiO2 increases to 223.41 kJ/mol. The thermal degradation activation energy of the TPS/SiO2 composites with hydrophilic SiOz is higher than that of the TPS/SiO2 composites with hydrophobic SIO2. It is found the thermal degradation activation energy of the TPS/SiO2 composites increases with the addition of SiO2 by Flynn-Wall-Ozawa method.

关 键 词：热塑性木薯淀粉 二氧化硅 热降解动力学 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]