物理化学学报 >> 2006, Vol. 22 >> Issue (04): 409-413.doi: 10.3866/PKU.WHXB20060404

研究论文 上一篇    下一篇

影响反相微乳液导电性能的因素

彭春玉;周海晖;曾伟;焦树强;罗胜联;旷亚非   

  1. 湖南大学化学化工学院, 长沙 410082
  • 收稿日期:2005-10-10 修回日期:2005-11-14 发布日期:2006-04-10
  • 通讯作者: 旷亚非 E-mail:yafeik@163.com

Studies on the Conductivity of Reverse Microemulsion

PENG Chun-Yu;ZHOU Hai-Hui;ZENG Wei;JIAO Shu-Qiang;LUO Sheng-Lian;KUANG Ya-Fei   

  1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China
  • Received:2005-10-10 Revised:2005-11-14 Published:2006-04-10
  • Contact: KUANG, Ya-Fei E-mail:yafeik@163.com

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摘要： 分别以聚乙二醇辛基苯基醚(Triton X-100)或十六烷基三甲基溴化铵(CTAB)为表面活性剂, 与正己烷、正己醇和水构成反相微乳液. 研究了水相H+浓度、表面活性剂、助表面活性剂等对微乳液导电性能的影响. 结果表明, 增加水相H+浓度可大幅度提高反相微乳液的导电能力, 当H+浓度由1.0 mol•L-1增加到10 mol•L-1时, 微乳液的电导率可提高1~2个数量级. 当水相H+浓度为10 mol•L-1时, 微乳液的电导率随溶水量的增大而增大, 水油体积比为3:10时, 两种体系的电导率均达到3200 μS•cm-1. Triton X-100浓度对微乳液的电导率影响较大, 电导率随其浓度增加而增大；而CTAB浓度对微乳液电导率的影响较小, 电导率随其浓度增加略有减小；助表面活性剂正己醇使非离子型反相微乳液的电导率下降, 而使阳离子型反相微乳液的电导率先增大, 然后减小, 呈骆峰状变化.

关键词: 反相微乳液, 电导率, H+浓度, 表面活性剂, 助表面活性剂, 温度

Abstract: Surfactant p-octyl polyethylene glycol phenyl ether (Triton X-100) or cetyltrimethylammonium bromide (CTAB) was mixed with n-hexane, n-hexanol, and water for preparing reverse microemulsion. The effects of H+ concentration in water phase, concentrations of surfactant and cosurfactant on the microemulsion conductivity were studied. The results demonstrated that increasing H+ concentration in water phase enhanced the conductivity of reverse microemulsion greatly. The conductivity of microemulsion could be increased by 1~2 orders of magnitude as the H+ concentration increased from 1 mol•L-1 to 10 mol•L-1. When the H+ concentration of water phase was 10 mol•L-1, the conductivity of microemulsion enhanced as the water volume increased. The conductivity of these microemulsion increased to about 3200 μS•cm-1 when the volume ratio of water to oil was 3:10. The conductivity of microemulsion was enhanced as the Triton X-100 concentration increased, while it decreased with the increase of the CTAB concentration. The conductivity of non-ionic microemulsion decreased with the increase of cosurfactant concentration, while the conductivity of ionic microemulsion showed a camel shape change with the cosurfactant concentration.

Key words: Reverse microemulsion, Conductivity, H+ concentration, Surfactant, Cosurfactant, Temperature