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采用稀释法绘制了十六烷基三甲基溴化铵(CTAB)/正丁醇/硝基苯(NB)/水体系拟三元相图,通过电导法确定了微乳体系的结构及相转变过程。研究了温度,酸度,硫酸锌(ZnSO4)浓度对微乳液稳定性影响。结果表明,随体系温度的升高,硝基苯增溶量增大;随着体系水相酸度的增加,微乳体系的含水量呈不规则变化;随着体系水相硫酸锌浓度的增加,微乳体系的含水量基本呈规则性变化。体系可在较大助表面活性剂与表面活性剂质量比值(Km=w(C4H9OH)/w(CTAB))范围内形成微乳区。微乳液相转变过程是连续的,且电导率≥2.0 mS/cm,其值完全符合有机电合成的要求。
Pseudo ternary phase diagram of cetyl trimethyl ammonium bromide (CTAB) / n-butanol / nitrobenzene (NB) / water system was drawn by dilution method. The structure and phase of microemulsion system Change process. The effects of temperature, acidity and ZnSO4 concentration on the stability of microemulsion were studied. The results showed that as the temperature of the system increased, the solubilization of nitrobenzene increased. With the increase of aqueous phase acidity, the water content of the microemulsion showed an irregular change. With the increase of the aqueous phase zinc sulfate concentration, The microemulsion system has a regular change in the water content. The system can form a microemulsion region within the range of larger cosurfactant to surfactant mass ratio (Km = w (C4H9OH) / w (CTAB)). Microemulsion phase transition process is continuous, and the conductivity ≥ 2.0 mS / cm, its value in full compliance with the requirements of the electro-mechanical synthesis.