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通过电导率测定,研究了AS/n-C_4H_9OH/n-C_8h_(18)/H_2O和SDS/n-C_4H_9OH/n-C_8H_(18)/H_2O两个体系微乳液的结构,并把其似三组分相图上的微乳液区分为水包油(O/W)型、油水双连续(IZ)型和油包水(W/O)型三个区域。随着体系中水量增加,其结构按照W/O→IZ→O/W型转变。对于上述体系,表面活性剂的增加,有利于生成O/W型;助表面活性剂增加,有利于W/O型生成。在AS/n-C_4H_9OH/n-C_8H_(18)/H_2O体系中,以正戊醇代替正丁醇,IZ区域和部分O/W和W/O区域消失,导致液晶区域出现。随着温度升高,在AS/n-C_5H_(11)OH/n-C_8H_(18)/H_2O体系中,液晶区域缩小甚至消失。在W/O区域内,主要是表面活性剂阴离子导电;在O/W区域内,主要是Na+导电;在IZ区域内,两者都有导电的作用。
The structure of AS / n-C_4H_9OH / n-C_8h_ (18) / H_2O and SDS / n-C_4H_9OH / n-C_8H_ (18) / H_2O microemulsion was studied by conductivity measurement. The microemulsion on the phase diagram is divided into three regions: O / W, IZ and W / O. As the amount of water in the system increases, the structure changes according to W / O → IZ → O / W. For the above system, the increase of the surfactant is conducive to the generation of O / W type; the increase of the cosurfactant is beneficial to the W / O type formation. In the AS / n-C_4H_9OH / n-C_8H_ (18) / H_2O system, n-amyl alcohol instead of n-butanol, IZ region and part of the O / W and W / O region disappear, resulting in liquid crystal region appears. As the temperature increases, the liquid crystal region shrinks or even disappears in the AS / n-C_5H_ (11) OH / n-C_8H_ (18) / H_2O system. In the W / O region, the surfactant anion is predominantly conductive; in the O / W region, Na + is predominantly conductive; in the IZ region, both are electrically conductive.