Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (01): 12-15.doi: 10.3866/PKU.WHXB20070103

• ARTICLE • Previous Articles     Next Articles

Dilational Properties of Hydroxy-substituted Sodium Alkyl Benzene Sulfonate at Surface and Water-decane Interface

HUANG Yu-Ping;ZHANG Lei;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; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2006-05-17 Revised:2006-06-27 Published:2007-01-08
  • Contact: ZHANG Lu

Abstract: The dilational properties of sodium 2-hydroxy-3,5-didecyl benzene sulfonate were expounded at both water-air and water-decane interfaces. It showed that the dilational moduli were one order of magnitude higher than ordinary surfactants such as alkyl benzene sulfonates and the dilational phase angles had lower negative values. These results were attributed to the hydrogen bond formed between surfactant molecules at the interface.

Key words: Salt hydroxy-substitute alkylbenzene sulfonate, Dilational modulus, Phase angle, Interfacial tension relaxation