Droplet microemulsions at the emulsification boundary: The influence of the surfactant structure on the elastic constants of the amphiphillic film
Droplet microemulsions at the emulsification boundary: The influence of the surfactant structure on the elastic constants of the amphiphillic film
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乳化边界处的液滴微乳液：表面活性剂结构对两亲膜弹性常数的影响
DOI：
10.1063/1.473888
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发表时间：
1997
影响因子：
4.4
通讯作者：
R. Strey
中科院分区：
文献类型：
--
作者：
M. Gradzielski;D. Langevin;T. Sottmann;R. Strey
用小角中子散射（SANS）研究了非离子型油/水（O/W）微乳液的液滴结构。可以从实验多分散性推导出的弹性模量的总和2κ+κ与从界面张力测量独立推导出的值进行了很好的比较，从而表明我们对弹性常数的测定似乎是可靠的。在这项研究中，非离子表面活性剂的不同链长和不同的头部基团进行了研究（聚乙二醇单烷基醚CIEj和烷基二甲基氧化胺）。对实验数据的解释表明，两亲膜的弹性随两亲膜厚度的增加而增加。然而，它并不显著地取决于头基的类型，而是主要由表面活性剂的烷基链的长度决定。在不同链长的表面活性剂的混合物中，发现2κ+κ之和随混合物的摩尔组成线性变化。
The droplet structure of nonionic oil/water (O/W) microemulsions has been investigated by small-angle neutron scattering (SANS). The sum 2κ+κ of the elastic moduli that can be deduced from the experimental polydispersity compares well with the values independently deduced from interfacial tension measurements, thereby showing that our determination of the elastic constants appears to be reliable. In this study, nonionic surfactants of different chain length and with different head groups were investigated (polyethylene glycol monoalkylether CiEj and alkyldimethlyamine oxides). The interpretation of the experiment data shows that the elasticity of the amphiphilic film increases with the thickness of the amphiphilic film. However, it does not depend significantly on the type of the head group but is primarily determined by the length of the alkyl chains of the surfactant. In mixtures of surfactants of different chain lengths, the sum 2κ+κ is found to vary linearly with the molar composition of the mixture.