三苯甲烷类酸性显色剂在微乳液液滴与水连续相间分配系数的测定  

Determination of the Distribution Coefficient of Triphenylmethane acid Chromogenic Agent in Microemulsion Droplets and the Continuous Phase of Water

作　　者：张莹琪[1] 崔妙春 Zhang Yingqi;Cui Miaochun(School of Chemistry and Chemical Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]太原工业学院,山西太原030008

出　　处：《山东化工》2021年第6期96-97,共2页Shandong Chemical Industry

摘　　要：显色剂在微乳液液滴与水连续相间的分配系数可直接反映微乳液对显色剂的增溶能力。20℃下用紫外-可见分光度法测定了三苯甲烷类酸性显色剂邻苯二酚紫、甲基百里酚蓝在CTMAB/正戊醇/正庚烷/水、SDS/正戊醇/正庚烷/水、OP-10/正戊醇/正庚烷/水微乳液滴与水连续相中分配系数和分配过程吉布斯函数变。结果表明CTMAB、SDS、OP-10微乳液滴对邻苯二酚紫、甲基百里酚蓝均有较强的增溶能力,增溶性能随显色剂种类、微乳液类型和体系的pH而变化。在阳离子微乳液与水连续相中邻苯二酚紫、甲基百里酚蓝的分配系数均随pH值增大而增大,在阴离子微乳液与水连续相中邻苯二酚紫的分配系数为pH11时最大,而甲基百里酚蓝的分配系数为pH值=9时最大,在非离子微乳液与水连续相中邻苯二酚紫的分配系数为pH值=9时最大,而甲基百里酚蓝的分配系数为pH值=11时最大。The distribution coefficientsof Chromogenic agent in the the microemulsion droplets and continuous phase of water can directly reflect the solubilizing ability of the microemulsion to Chromogenic agent.The distribution coefficients and Gibbs function change in distribution process of triphenylmethane acid Chromogenic agentpyrocatechol violet and methylthymol blue in CTMAB/n-C_(5)H_(11)OH/n-C7H_(16)/H_(2)O,SDS/n-C_(5)H_(11)OH/n-C_(7)H_(16)/H_(2)O,OP-10/n-C_(5)H_(11)OH/n-C_(7)H_(16)/H_(2)O microemulsion droplets and the continuous phase of water respectively are determined by UV and visible spectrophotometry at 20℃.The results show that CTMAB,SDS and OP-10 microemulsions have strong solubilizing ability to pyrocatechol violet and methylthymol blue.The performances of solubilization varie with the type of Chromogenic agent,the type of microemulsions and the pH values of the system.The distribution coefficients of pyrocatechol violet and methylthymol blue in the microemulsion droplets and continuous phase of water increase with the increase of pH value.In the anionic microemulsion droplets and continuous phase of water,the distribution coefficient of pyrocatechol violet reachs the maximum at pH 11,while the distribution coefficient of methylthymol blue peaks at pH 9.In nonionic microemulsion droplets and continuous phase of water,the distribution coefficient of pyrocatechol violet reachs the maximum at pH 9,while the distribution coefficient of methyl thymol blue peaks at pH 11.

关 键 词：微乳液 邻苯二酚紫 甲基百里酚蓝 分配系数 分光光度法 

分 类 号：O657.3[理学—分析化学]