石油化工高等学校学报

石油化工高等学校学报 ›› 2011, Vol. 24 ›› Issue (3): 1-4.DOI: 10.3696/j.issn.1006-396X.2011.03.001

• 石油化工 •    下一篇

基于DSC技术表征油水乳化液的研究

朱玲,陈家庆,常俊英,潘莹   

  1. 北京石油化工学院环境工程系
  • 收稿日期:2010-05-04 修回日期:2010-12-11 出版日期:2011-06-25 发布日期:2011-06-25
  • 作者简介:朱玲(1975 -), 女, 江苏靖江市, 副教授, 博士
  • 基金资助:
    国家863 计划资助项目(2007AA062225);国家自然基金资助项目(51079006);北京市属市管高等学校人才强教计划资助项目(PH R 201107147 ,PH R 201107213 PHR 201108365)

DSC Study of the Characterization for Water-in-Oil Emulsion

  1. Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617,P.R.China
  • Received:2010-05-04 Revised:2010-12-11 Published:2011-06-25 Online:2011-06-25

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摘要： 根据自由水和界面水冷凝时结晶的温度和热焓值不同, 采用DSC 技术分析表征了油水乳化液中不同状态的水, 还比较了油水乳化液的相对稳定性。结果表明, 当含水的质量分数超过15 %时, 样品不仅在-40 ℃出现了对应于界面水冷凝的放热峰, 而且在-18 ℃新出现自由水冷凝的放热峰, 并随水配比增加, 出峰温度略有上升。随着放置时间的增加, 30%W/ O 油水乳化液样品稳定性下降, 界面水相对含量减少, 当放置时间超过8 d 后, 在样品 DSC 谱图上不再出现界面水冷凝放热峰, 自由水冷凝对应的放热峰面积明显增大, 说明油水乳化液的稳定性被完全破坏。

关键词: 油水乳化液 , 自由水 , 界面水 , DSC 技术 , 稳定性

Abstract: Due to the difference of crystallization temperature and enthalpy for free water and interfacial water during the course of cooling, a series of water-in-oil emulsions were studied experimentally by means of differential scanning calorimetry (DSC). The free water and interfacial water and to measure the time-dependent changes were characterized. From the result can only find one exothermic peak corresponding to the interfacial water at about -40 ℃ when the solubilized water mass fraction 15%. By increasing the amount of the solubilized water to 15%, a new significant exothermic peak is present (at -18 ℃) which is attributed to free water. Both the crystallization temperature of free water and interfacial water are affected by the concentration of solubilized water weekly. The stabilization of the 30%W/O emulsion is decreased with the increase of time placed, and the concentration of interfacial water is also reduced. The peak for the crystallization of interfacial water can not found in the DSC thermogram for the sample prepared over 8 days, and the area of the exothermic peak for the free water crystallization is increased apparently. The change for DSC thermogram indicates that the stabilization of 30%W/O emulsion is destroyed absolutely. 

Key words:

Water-in-oil emulsuion,    , Free water,    ,  Interfacial water,    , DSC technology,    ,  Stabilizationmso-ascii-theme-font: minor-latin, mso-fareast-font-family: 宋体, mso-fareast-theme-font: minor-fareast, mso-hansi-theme-font: minor-latin, mso-ascii-font-family: Calibri, mso-hansi-font-family: Calibri">

引用本文

朱玲,陈家庆,常俊英,潘莹. 基于DSC技术表征油水乳化液的研究[J]. 石油化工高等学校学报, 2011, 24(3): 1-4.

ZHU Ling, CHEN Jia-qing, CHANG Jun-ying, PAN Ying. DSC Study of the Characterization for Water-in-Oil Emulsion[J]. Journal of Petrochemical Universities, 2011, 24(3): 1-4.

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