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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 viscoelastic properties of sodium 2-methyl-5- (1-heptyloctyl) benzene sulfonate, sodium octyl benzene sulfonate and sodium hexadecyl benzene sulfonate on n-octane-water interface , The effects of chain length variation and hydrophobic group branching on the molecular interface behavior were investigated.The results show that the increase of chain length leads to the enhancement of the intermolecular interaction and the increase of the elastic property.The hydrophobic branches may appear in the interface due to entanglement and deformation Slow relaxation process, leading to a higher expansion modulus.