物理化学学报 >> 2008, Vol. 24 >> Issue (09): 1699-1702.doi: 10.3866/PKU.WHXB20080930

研究简报 上一篇    下一篇

正二十二烷醇的热力学性质

童波; 谭志诚; 王韶旭   

  1. 中国科学院大连化学物理研究所热化学实验室, 辽宁 大连 116023; 大连交通大学环境与化学工程学院, 辽宁 大连 116028
  • 收稿日期:2008-01-23 修回日期:2008-05-27 发布日期:2008-09-10
  • 通讯作者: 谭志诚 E-mail:tzc@dicp.ac.cn

Thermodynamic Properties of 1-Docosanol

TONG Bo; TAN Zhi-Cheng; WANG Shao-Xu   

  1. Thermochemisty Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China; College of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116028, Liaoning Province, P. R. China
  • Received:2008-01-23 Revised:2008-05-27 Published:2008-09-10
  • Contact: TAN Zhi-Cheng E-mail:tzc@dicp.ac.cn

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摘要： 用精密自动绝热量热仪测定了广谱抗病毒药物正二十二烷醇在78-400 K温区的热容. 根据实验测定的热容数据, 用最小二乘法拟合计算出热容对温度的多项式方程, 得到其相变温度、相变焓、相变熵分别为340.844 K、85.07 kJ·mol-1、249.6 J·K-1·mol-1. 根据热力学函数关系式计算了其在80-400 K温区每隔5 K的热力学函数[HT-H298.15]和[ST-298.15]. 用DSC、TG热分析技术进一步考查了该物质在400-900 K的热稳定性.

关键词: 正二十二烷醇, 热容, DSC, TG, 热力学性质

Abstract: Heat capacity Cp,m of 1-docosanol was precisely measured in the temperature range from 78 to 400 K by means of an automated adiabatic calorimeter. The dependence of heat capacity on the temperature was fitted to polynomial equations with least square method. The melting temperature, molar enthalpy, and molar entropy of fusion were determined to be 340.844 K, 85.07 kJ·mol-1, and 249.6 J·K-1·mol-1, respectively. The thermodynamic functions, [HT-H298.15] and [ST-S298.15], were derived from the thermodynamic equations in the temperature range from 80 to 400 K with an interval of 5 K. The thermostability of the compound was further investigated by DSC and TG techniques from400 to 900 K.

Key words: 1-Docosanol, Heat capacity, DSC, TG, Thermodynamic property