Interfacial dilational rheological property and lamella stability of branched alkyl benzene sulfonates solutions
Interfacial dilational rheological property and lamella stability of branched alkyl benzene sulfonates solutions
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DOI：
10.1007/s00396-011-2415-y
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发表时间：
2011-06-01
影响因子：
2.4
通讯作者：
Yu, Jia-Yong
中科院分区：
文献类型：
--
作者：
Ma, Bao-dong;Zhang, Lei;Yu, Jia-Yong
采用滴形分析方法研究了支链烷基苯磺酸盐在空气-水界面和癸烷-水界面的动态膨胀特性，并测定了其片层稳定性。阐述了时间、膨胀频率和体积浓度对表面膨胀弹性和膨胀粘度的影响。结果表明，在较低浓度范围内，分子相互作用控制着吸附膜的性质，吸附膜在性质上表现为弹性。在较高的浓度范围内，扩散交换过程控制着膜的动态膨胀特性，表面膜表现出显著的粘弹性。疏水链长度的增加增加了分子间的相互作用，从而增加了膨胀参数和片层的稳定性。数据相关性表明，形成稳定薄片的能力与表面固有的膨胀弹性有关。
The dynamic dilational properties of branched alkyl benzene sulfonates at the air-water and decane-water interfaces were investigated by drop shape analysis, and their lamella stability was measured. The influences of time, dilational frequency, and bulk concentration on surface dilational elasticity and dilational viscosity were expounded. The results show that the molecular interaction controls the nature of adsorption film during lower concentration range and the film behaves elastic in nature. During higher concentration range, the diffusion-exchange process controls the dynamic dilational properties and the surface film shows remarkable viscoelasticity. An increase in hydrophobic chain length enhances the molecular interaction, which results in the increase of dilational parameters and lamella stability. The data correlation suggests that the ability to form a stable lamella is linked to the intrinsic surface dilational elasticity.