摘要
本研究采用热重分析法研究了分子筛ZSM-5填充海藻酸钠在空气中的热分解过程,升温速率分别为5K/min、10K/min、15K/min、20K/min和30K/min,温度范围为室温(298K)至1250K,并利用TGA曲线分析了复合材料的热分解特性。热重分析结果显示,热分解反应最剧烈的温度介于450～650K之间,热分解动力学分析表明,该热分解过程为一级反应,可通过最大失重速率温度法和Ozawa等失重率法分别计算求得活化能和频率因子。结果表明,活化能和频率因子随着失重率的增加而增大,分子筛ZSM-5的加入有利于海藻酸钠的热分解。
In this study, thermogravimetric analysis（TGA） was used to investigate the thermal decomposition behavior of ze- olite ZSM- 5 filled sodium alginate under air atmosphere at heating rates of 5K/min, 10K/rain, 15K/rain, 20K/rain and 30K/min and in the temperature range from 298K up to 1250K. Thermal decomposition features of sodium alginate were an- alyzed based on TGA curves. Thermogravimetric analysis results showed that the main thermal decomposition of sodium alg- inate occured in the range of 450 -650K and it was found to the 1 st order reaction from kinetic analysis. Decomposition pa- rameters including the activation energy and frequency factor were got using the maximum weight loss rate method and the Ozawa isoconversional method, respectively. These results showed that the activation energy and frequency factor are both increasing with the increase of weight loss ratio and addition of zeolite ZSM - 5 has made the thermal decomposition of sodi- um alginate more readily.
出处
《中国印刷与包装研究》
CAS
2013年第3期61-67,共7页
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