Role of surfactant structure on surface and foaming properties
Role of surfactant structure on surface and foaming properties
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DOI：
10.1016/s0927-7757(01)00602-1
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发表时间：
2001-09-15
影响因子：
5.2
通讯作者：
Gandini, A
中科院分区：
文献类型：
--
作者：
Beneventi, D;Carre, B;Gandini, A
表面活性剂结构对界面性质的影响估计从静态和动态表面张力和界面复合模量的测量，如从基于振荡气泡法的图像分析技术获得的。介绍了表面活性剂分子在气液界面吸附的简化动力学模型，并通过动态表面张力的测定确定了吸附速率。用改进的Bikerman装置测定了气泡通过不同表面活性剂溶液所产生泡沫的平均寿命。从这项研究中产生的主要结论，从基本的考虑，预期的是，链长度的表面活性剂的疏水部分起着决定性的作用，相对于动力学迁移到界面和随后的表面活性，所示的相延迟和泡沫稳定性的程度。(C)2001 Elsevier Science B.V.保留所有权利。
The influence of surfactant structure on interface properties was estimated from measurements of the static and dynamic surface tension and the interface complex modulus, as obtained from an image analysis technique based on the oscillating bubble method. A simplified kinetic model of surfactants molecular adsorption at the gas-liquid interface was introduced and the rate of adsorption was determined from measurements of the dynamic surface tension. The mean life time of foams generated from bubbling air through different surfactant solutions was measured using a modified Bikerman device. The major conclusion arising from this study, as expected from basic considerations, was that the chain length of the hydrophobic part of the surfactant plays a determining role with respect to both the kinetic migration to the interfaces and the ensuing surface activity, as shown by the extent of phase delay and foam stability. (C) 2001 Elsevier Science B.V. All rights reserved.