CTAB反相微乳体系的相行为研究  

Study on the phase behavior of CTAB reverse microemulsion system

作　　者：王农[1] 杨利娟[1] 王兴权[1] 肖蓉[1] 陈利轩[1] 

机构地区：[1]兰州交通大学化学与生物工程学院,甘肃省植物源生物农药工程技术研究中心,甘肃兰州730070

出　　处：《化学研究与应用》2014年第8期1200-1209,共10页Chemical Research and Application

基　　金：甘肃省工程技术研究中心项目(1106NTGA013);甘肃省重大科技专项(1002NKDA025);兰州交通大学"青蓝"人才工程基金资助项目;金川公司预研基金资助项目(JCYY2013008)

摘　　要：实验绘制了系列十六烷基三甲基溴化铵(CTAB)+正丁醇+正己烷+水(或CaCl2水溶液)拟三元体系相图。分别研究了正丁醇的添加比例和CaCl2水溶液的浓度对微乳区域的影响,发现随着正丁醇的相对比例逐渐增大,拟三元体系中微乳区的面积逐渐减小,表明过多增加正丁醇的量不利于微乳相的形成;发现总体上随着CaCl2水溶液摩尔浓度的增加,拟三元体系中微乳区的面积逐渐减小,表明强电解质的加入对微乳相影响较大,较高浓度的CaCl2会使部分CTAB失去表面活性而难以形成微乳液,导致微乳相区域逐渐减小。实验测定了电导率随水(或CaCl2水溶液)含量变化的规律,依据电解质理论探讨了微乳液的微观结构,并通过选择一定R0值的CaCl2微乳液与等摩尔的碳酸钠水溶液反应制备了球形纳米碳酸钙粒子。A series of quasi ternary phase diagram of hexadecyl trimethyl ammonium bromide（ CTAB）＋n-butanol＋n-hexane＋water （ brine） system have been drawn based on experiments. We investigated the influence of cosurfactant n-butanol with different addition and CaCl2 solution with different molar concentration on the microemulsion region respectively. We found that the area of microemulsion region in the ternary system gradually decreased with the relative proportions of cosurfactant n-butanol increase,these results shown that they are not conducive to the formation of microemulsion phase when the amount of n-butanol in relatively high levels;We found that the area of microemulsion region in the ternary system decreased with the increase of the molar concentration of calcium chloride, these results shown that strong electrolytes has an important effect on the microemulsion phase, higher concentration of CaCl2 will make part of CTAB lose surface activity and will make the system difficult to form microemulsion,these leads to the decreasing of microemulsion phase area. The rules of conductivity changing with the added amount of water（ or CaCl2 aqueous solution）were measured experimentally,the microscopic structure of microemulsion had been discussed according to the electrolytic theory, and sphere nanometer calcium carbonate particles were prepared by choosing a certain value R0 of CaCl2 microemulsion reacting with equimolar sodium carbonate solution.

关 键 词：微乳液 CTAB 拟三元体系相图 电导率 纳米CACO3 

分 类 号：O631[理学—高分子化学] O642[理学—化学]