物理化学学报 >> 2006, Vol. 22 >> Issue (12): 1441-1444.doi: 10.3866/PKU.WHXB20061202

研究论文 上一篇    下一篇

不同结构烷基苯磺酸盐油水界面扩张粘弹性质

宋新旺;王宜阳;曹绪龙;罗澜;王琳;张路;岳湘安;赵濉;俞稼镛   

  1. (中国石油大学(北京), 北京 102249; 中国石化胜利油田分公司地质科学研究院, 山东 东营 257015; 中国科学院理化技术研究所, 北京 100080)
  • 收稿日期:2006-05-12 修回日期:2006-07-12 发布日期:2006-12-06
  • 通讯作者: 张路 E-mail:luyiqiao@hotmail.com

Dilational Viscoelastic Properties of Sodium Alkyl Benzene Sulfonates with Different Structures at Octane/Water Interface

SONG Xin-Wang;WANG Yi-Yang;CAO Xu-Long;LUO Lan;WANG Lin;ZHANG Lu;YUE Xiang-An;ZHAO Sui;YU Jia-Yong   

  1. (China University of Petroleum (Beijing), Beijing 102249, P. R. China; Geological Research Institute of Shengli Oilfield Co. Ltd, SINOPEC, Dongying 257015, P. R. China; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China)
  • Received:2006-05-12 Revised:2006-07-12 Published:2006-12-06
  • Contact: ZHANG Lu E-mail:luyiqiao@hotmail.com

摘要: 研究了2-甲基-5-(1-庚基辛基)苯磺酸钠、辛基苯磺酸钠和十六烷基苯磺酸钠在正辛烷-水界面上的扩张粘弹性质, 考察了链长变化和疏水基支链化对分子界面行为的影响. 研究结果表明, 链长增加导致分子间相互作用增强, 弹性增大; 疏水支链在界面上可能由于缠绕和变形产生界面慢弛豫过程, 导致较高的扩张模量.

关键词: 烷基苯磺酸盐, 扩张模量, 相角, 界面张力弛豫

Abstract: The dilational viscoelasticity properties of octane-water interface containing three sodium alkyl benzene sulfonates with straight chain (C8phSO3Na and C16phSO3Na) and branch chain (7-8-1) respectively were investigated. The influences of alkyl chain length and hydrophobic branched-chain structure on interfacial dilational properties were expounded. It showed that the increase of alkyl chain length resulted in the enhancement of molecular interaction and the increase of interfacial dilational elasticity. The slow relaxation processes were caused by the rearrangement and entanglement of branched-chains at interface and resulted in relative higher interfacial dilational modulus.

Key words: Sodium alkyl benzene sulfonate, Dilational modulus, Phase angle, Interfacial tension relaxation