物理化学学报 >> 2007, Vol. 23 >> Issue (12): 1881-1885.doi: 10.3866/PKU.WHXB20071210

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不同结构三取代烷基苯磺酸钠表、界面的扩张性质

张磊; 王晓春; 宫清涛; 罗澜; 张路; 赵濉; 俞稼镛   

  1. 中国科学院理化技术研究所, 北京 100080
  • 收稿日期:2007-07-10 修回日期:2007-08-21 发布日期:2007-11-30
  • 通讯作者: 赵濉 E-mail:zhaosui@mail.ipc.ac.cn

Dilational Properties of Tri-substituent Sodium Alkyl Benzene Sulfonates with Different Structures at the Air/Water and Decane/Water Interfaces

ZHANG Lei; WANG Xiao-Chun; GONG Qing-Tao; LUO Lan; ZHANG Lu; ZHAO Sui; YU Jia-Yong   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
  • Received:2007-07-10 Revised:2007-08-21 Published:2007-11-30
  • Contact: ZHAO Sui E-mail:zhaosui@mail.ipc.ac.cn

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摘要： 利用悬挂滴方法研究了两种同分异构体的表面活性剂2-丙基-4,5-二己基苯磺酸钠(366)和2,5-二丙基-4-壬基苯磺酸钠(393)在空气/水表面和癸烷/水界面上的扩张流变性质, 考察了不同表面活性剂浓度下366和393溶液表、界面扩张性质的异同. 实验结果表明, 磺酸根间位的长链烷基对表面扩张模量贡献较大, 表面活性剂分子大小对界面扩张模量影响较大.

关键词: 烷基苯磺酸盐, 表面, 界面, 扩张模量

Abstract: The dilational rheological properties of a pair of structural isomers: sodium 2-propyl-4,5-dihexyl benzene sulfonate (366) and sodium 2,5-dipropyl-4-nonyl benzene sulfonate(393) at the air/water and decane/water interfaces were investigated by drop shape analysis method. The influences of concentration on dilational modulus were expounded. The experimental results showed that the 5-alkyl played an important role in the surface dilational modulus, while the dimension of surfactant molecule dominated the interfacial dilatinal modulus.

Key words: Sodiumalkyl benzene sulfonate, Surface, Interface, Dilational modulus

MSC2000: 

  • O647