Water-AOT-alkylbenzene microemulsions: influence of alkyl chain length on structure and percolation behavior.
Water-AOT-alkylbenzene microemulsions: influence of alkyl chain length on structure and percolation behavior.
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水-AOT-烷基苯微乳液:烷基链长度对结构和渗滤行为的影响
DOI:
10.1016/j.jcis.2012.02.062
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发表时间:
2012
影响因子:
9.9
通讯作者:
Stühn
中科院分区:
文献类型:
--
作者:
Stühn
We study the percolation behavior of the water-in-oil (w/o) droplet phase of AOT (sodium bis[2-ethylhexyl] sulfosuccinate)-based microemulsions with different alkylbenzenes (toluene, ethylbenzene, butylbenzene or octylbenzene) as oil phase. We use microemulsions of varying composition with molar water to surfactant ratios 0⩽W⩽ 50 and droplet (water plus surfactant) volume fractions 10%⩽ϕ⩽50%. Using dielectric spectroscopy, a percolation transition is observed in w/o microemulsions with butylbenzene or octylbenzene. With increasing molecular weight of the alkylbenzene, the percolation temperature TPdecreases. The structure of the microemulsions is determined by small angle X-ray scattering (SAXS). With increasing molar weight of the alkylbenzene, the stability range of the L2droplet phase extends to higher W. The larger amount of solubilizable water can be related to variable oil penetration of the AOT monolayer, which affects the spontaneous curvature of the surfactant shell.
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DOI:
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发表时间:
2003
期刊:
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作者:
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DOI:
10.1088/0953-8984/20/10/104204
发表时间:
2008
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
T. Spehr;B. Frick;I. Grillo;B. Stühn
通讯作者:
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