不同结构烷基苯磺酸盐油水界面扩张粘弹性质  

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

作　　者：宋新旺[1,2] 王宜阳[3] 曹绪龙[4] 罗澜[3] 王琳[3] 张路[3] 岳湘安[1] 赵濉[3] 俞稼镛[3] 

机构地区：[1]中国石油大学(北京) [2]中国石化胜利油田分公司地质科学研究院,山东东营257015 [3]中国科学院理化技术研究所 [4]中国石化胜利油田分公司地质科学研究院

出　　处：《物理化学学报》2006年第12期1441-1444,共4页Acta Physico-Chimica Sinica

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.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.

关 键 词：烷基苯磺酸盐 扩张模量 相角 界面张力弛豫 

分 类 号：O647.1[理学—物理化学]