食品科学 ›› 2003, Vol. 24 ›› Issue (9): 52-54.

• 基础研究 • 上一篇    下一篇

用差热分析法测定羟丙基-β-环糊精的热稳定性

 曹新志, 檀宜兵, 金征宇   

  1. 江南大学食品学院
  • 出版日期:2003-09-15 发布日期:2011-12-13

Study on Thermal Stability of Hydroxg Propyl-β-Cyclodextrin by DSC

 CAO  Xin-Zhi, TAN  Yi-Bing, JIN  Zheng-Yu   

  • Online:2003-09-15 Published:2011-12-13

摘要: 用差示扫描量热法(DSC)测定羟丙基-β-环糊精的热稳定性,按Kissinger方程和Ozawa方程计算反应的活化能,分别为168.1 kJ/mol和169.3 kJ/mol。并按Ozawa方法计算得指前因子为4.546×1019min-1。从DSC曲线图上获得焓变(△H)为173.77kJ/mol,熵变(△S)为0.2853kJ/mol•K。

关键词: 差示扫描量热法, 羟丙基-&beta, -环糊精, 热稳定性, 活化能

Abstract: The thermal stability of hydroxypropyl-β-cyclodextrin was examined by differential scanning calorimetry (DSC). Byeither the Kissinger’s equation or Ozawa’s equation, the activation energy of thermal degradation of hydroxypropyl-β-cyclodextrinwas found to be 168.1 kJ/mol and 169.3 kJ/mol respectively. The results were in good agreement. The preexponential factor (A) was4.546×1019 according to method of Ozawa. The enthalpy change was 173.77kJ/mol and entropy change 0.2853kJ/mol•K.

Key words: differential scanning calorimetry(DSC), hydroxypropyl-β-cyclodextrin, thermal stability, activation energy