Refractive index of water-AOT-n-heptane microemulsions

Refractive index of water-AOT-n-heptane microemulsions
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水-AOT-正庚烷微乳液的折射率

DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
G. Vassallo
G. Vassallo
中科院分区：
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文献类型：
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作者：
M. Goffredi;V. Liveri;G. Vassallo

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在25°C下测量了水/AOT/正庚烷微乳液的折射率随分散相（水+AOT）的体积分数R和水/AOT摩尔比R的变化。发现折射率随温度单调变化，在逾渗阈值的交叉过程中没有任何速率变化。这表明，在高于逾渗阈值的情况下，水-AOT-正庚烷微乳液仍由分散在油相中的含水AOT反胶束形成。实验数据的分析允许评估作为R的函数的与AOT头部基团键合的水分子的分数。
Refractive index measurements on water/AOT/n-heptane microemulsions as a function of the volume fraction ϕ of the dispersed phase (water plus AOT) and of the water/AOT molar ratio R have been performed at 25°C. The refractive index was found to vary monotonically with ϕ without any change in rate during the crossover of the percolation threshold. Such a behavior suggested that, well above the percolation threshold, the water-AOT-n-heptane microemulsions are still formed by water-containing AOT reversed micelles dispersed in the oil phase. The analysis of the experimental data allowed an evaluation the fraction of the water molecules bonded to the AOT head group as a function of R.