Control over microemulsions with solvent blends.
Control over microemulsions with solvent blends.
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使用溶剂混合物控制微乳液。
作者：
O. Myakonkaya;J. Eastoe;K. Mutch;S. Rogers;R. Heenan;I. Grillo
以正庚烷/正十二烷、正十二烷/正十二烷、正辛烷/正十二烷、正十一烷/正十一烷共混体系为研究对象，研究了溶剂混合物对琥珀酸双(2-乙基己基)磺酸钠(AOT)稳定油包水微乳液相行为的影响。用小角中子散射法研究了改变溶剂组成对微乳液性质的影响，特别是在浊点(T(Cloud))和液液临界分离(T(Crit))附近。结果表明，改变溶剂混合物的组成可以强烈地影响液滴的相互作用，这对观察到的相边界的位置有影响。特别令人感兴趣的是使用精心挑选的溶剂混合物，其效果是将T(Crit)比纯正庚烷的值降低高达6摄氏度。
The effect of solvent mixtures on the phase behavior of sodium bis(2-ethylhexyl)sulfosuccinate (AOT) stabilized water-in-oil microemulsions has been studied by using heptane/dodecane, decane/dodecane, octane/dodecane, and nonane/undecane blends. Small-angle neutron scattering was employed to explore the effect of changing the solvent composition on the microemulsion properties, especially near the cloud point (T(cloud)) and the liquid-liquid critical separation (T(crit)). It is shown that droplet interactions can be strongly influenced by changing the solvent blend compostion, which has implications for the locations of observed phase boundaries. Of particular interest is the use of carefully selected solvent blends, which have the effect of lowering T(crit) by up to 6 degrees C from the value found in pure decane.