食品科学 ›› 2005, Vol. 26 ›› Issue (2): 142-145.

• 工艺技术 • 上一篇    下一篇

β-环糊精与肉桂醛包合物的制备及热分解动力学研究

 李光水, 夏文水   

  1. 中国科学技术大学化学系; 江南大学食品学院
  • 出版日期:2005-02-15 发布日期:2011-09-19

Kinetics of Thermal Decomposition of the Inclusion Complex of Cinnamaldehyde and β-cyclodextrin

 LI  Guang-Shui, XIA  Wen-Shui   

  1. 1.Department of Chemistry, University of Science and Technology of China; 2.College of Food Science and Technology,Southern Yangtze University
  • Online:2005-02-15 Published:2011-09-19

摘要: 采用饱和溶液法制备了肉桂醛与β-环糊精的包合物,用红外光谱、X射线衍射和核磁共振对其进行了表征,证实了包合物的形成。热重法分析了包合物的热分解动力学机理,确定包合物在氮气的分解反应属于成核和核成长为控制步骤的A1机理,热分解反应表观活化能为167.64kJ/mol,频率因子为2.18×1015/s。包合物在氮气中热分解动力学方程式为dα/dt=2.18×1015·e-167.64×103/RT·(1-α),动力学补偿效应表达式为lnA=0.19344E+2.19186。

关键词: 肉桂醛, &beta, -环糊精, 包合物, 制备, 热分解动力学

Abstract: An inclusion complex composed of Cinnamaldehyde andβ-cyclodextrin was prepared by solution-heating and the properties of the compound was investigated by using the IR absorption spectra, powder X-ray diffractometry and nuclear magnetic resoance. The kinetic behavior and process of thermal decomposition of the complex was studied by thermagravimetry. The decomposition reaction was controlled by random nucleation and subsequent growth mechanism (A1). Accordingly, kinetic equation can be deduced as, dα/dt=A·e-E/RT·(1-α). The kinetic compensation equation is lnA=0.19344E+2.19186.

Key words: cinnamaldehyde, β-cyclodextrin, inclusion complex, preparation, thermal decomposition kinetic