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Citation: SONG Xin-Wang, WANG Yi-Yang, CAO Xu-Long, LUO Lan, WANG Lin, ZHANG Lu, YUE Xiang-An, ZHAO Sui, YU Jia-Yong. Dilational Viscoelastic Properties of Sodium Alkyl Benzene Sulfonates with Different Structures at Octane/Water Interface[J]. Acta Physico-Chimica Sinica, ;2006, 22(12): 1441-1444. doi: 10.3866/PKU.WHXB20061202 shu

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

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 Date: 12 May 2006
Available Online: 6 December 2006

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.
- Sodium alkyl benzene sulfonate;Dilational modulus;Phase angle;Interfacial tension relaxation
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