物理化学学报 >> 2009, Vol. 25 >> Issue (01): 41-46.doi: 10.3866/PKU.WHXB20090108

研究论文 上一篇    下一篇

旋转滴方法研究界面扩张流变性质

张磊; 宫清涛; 周朝辉; 王武宁; 张路; 赵濉; 俞稼镛   

  1. 中国科学院理化技术研究所, 北京 100080; 北京东方德菲仪器有限公司, 北京 100089
  • 收稿日期:2008-08-06 修回日期:2008-10-14 发布日期:2008-12-31
  • 通讯作者: 赵濉 E-mail:zhaosui@mail.ipc.ac.cn

Study of Interfacial Dilational Properties by the Spinning Drop Technique

ZHANG Lei; GONG Qing-Tao; ZHOU Zhao-Hui; WANG Wu-Ning; ZHANG Lu; ZHAO Sui; YU Jia-Yong   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China; Beijing Eastern-Dataphy Instruments Co., Ltd., Beijing 100089, P. R. China
  • Received:2008-08-06 Revised:2008-10-14 Published:2008-12-31
  • Contact: ZHAO Sui E-mail:zhaosui@mail.ipc.ac.cn

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摘要： 采用旋转滴方法, 对2-丙基-4,5-二庚烷基苯磺酸钠(DHPBS)在癸烷-水界面上的扩张流变性质进行了研究, 较为详细地介绍了SVT20N视频旋转滴张力仪的装置和实验方法, 考察了油滴注入体积、基础转速及振荡振幅等实验条件对扩张模量的影响. 研究结果表明, 旋转滴方法是一种研究扩张流变性质的新型手段, 在涉及低界面张力现象的领域具有良好的应用前景.

关键词: 旋转滴方法, 烷基苯磺酸盐, 界面扩张性质, 扩张模量

Abstract: The dilational viscoelastic properties of 4,5-diheptyl-2-propylbenzene sulfonate (DHPBS) at the decane/water interface were investigated with a spinning drop tensiometer. The instrument of the spinning drop tensiometer SVT20N and the correlative experimental method were discussed in detail. The influence of oil drop volume, rotational speed, and oscillating amplitude on the interfacial dilational modulus were expounded. Experimental results show that spinning drop analysis is a novel method for probing interfacial dilational properties and has good prospects for application in the measurement of low interfacial tension phenomena.

Key words: Spinning drop analysis, Sodium alkyl benzene sulfonate, Interfacial dilational property, Dilational modulus