Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (12): 1881-1885.doi: 10.3866/PKU.WHXB20071210

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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

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


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