SCI和EI收录∣中国化工学会会刊

›› 2010, Vol. 18 ›› Issue (5): 767-769.

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Caffeine Crystallization Induction Time Measurements Using Laser Scattering Technique and Correlation to Surface Tension in Water and Ethanol

韩佳宾1,2, 王静康1   

  1. 1. School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China;
    2. Earth and Environmental Science Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
  • 收稿日期:2010-01-05 修回日期:2010-07-14 出版日期:2010-10-28 发布日期:2010-10-28
  • 通讯作者: HAN Jiabin,E-mail:jhan@lanl.gov;jiabin.han@gmail.com

Caffeine Crystallization Induction Time Measurements Using Laser Scattering Technique and Correlation to Surface Tension in Water and Ethanol

HAN Jiabin1,2, WANG Jingkang1   

  1. 1. School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China;
    2. Earth and Environmental Science Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
  • Received:2010-01-05 Revised:2010-07-14 Online:2010-10-28 Published:2010-10-28

摘要: Caffeine nucleation induction times were measured at 30℃ and 40℃ in water and ethanol solvents employing laser light absorption technique. Supersaturation concentrations and liquid/solid phase surface tensions were calculated from crystallization induction times using classic homogeneous nucleation theory. Induction time and surface tension decreased at higher temperature.

关键词: caffeine, induction time, crystallization, surface tension

Abstract: Caffeine nucleation induction times were measured at 30℃ and 40℃ in water and ethanol solvents employing laser light absorption technique. Supersaturation concentrations and liquid/solid phase surface tensions were calculated from crystallization induction times using classic homogeneous nucleation theory. Induction time and surface tension decreased at higher temperature.

Key words: caffeine, induction time, crystallization, surface tension