物理化学学报 >> 2010, Vol. 26 >> Issue (03): 541-546.doi: 10.3866/PKU.WHXB20100244

热力学、热化学和溶液化学 上一篇    下一篇

磁场对苯胺微乳液聚合体系相行为的影响

马利, 黎小锋, 甘孟瑜, 刘兴敏, 罗来正, 苏文义, 刘艳   

  1. 重庆大学化学化工学院, 重庆 400044
  • 收稿日期:2009-11-05 修回日期:2009-12-18 发布日期:2010-03-03
  • 通讯作者: 马利 E-mail:mlsys607@126.com

Magnetic Field Effects on the Phase Behavior of a Microemulsion System during Aniline Polymerization

MA Li, LI Xiao-Feng, GAN Meng-Yu, LIU Xing-Min, LUO Lai-Zheng, SU Wen-Yi, LIU Yan   

  1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China
  • Received:2009-11-05 Revised:2009-12-18 Published:2010-03-03
  • Contact: MA Li E-mail:mlsys607@126.com

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摘要：

通过十二烷基苯磺酸钠(SDBS)/正丁醇(n-butanol)/苯胺/水微乳液体系的拟三元相图, 考察了恒定磁场(0.4 T)和助表面活性剂与表面活性剂的质量比(Km=mn-butanol/mSDBS)对苯胺微乳液聚合体系的相行为、电导行为以及微乳化作用的影响. 结果表明: 随着体系醇含量的增加, 微乳区面积先增大后减小, 当Km值为1.0时, 形成的微乳区最大; 外加磁场可以增大微乳区面积. 通过对外加磁场条件下溶液电导率随水含量变化规律的分析, 印证了拟三元相图的表征结果. 透射电镜分析结果表明, 磁场条件下合成的聚苯胺颗粒比无磁场条件下合成的聚苯胺颗粒小.

关键词: 微乳液, 苯胺, 磁场, 相行为, 拟三元相图

Abstract:

Magnetic field (MF) and the mass ratio of a co-surfactant and a surfactant (Km=mn-butanol/mSDBS) on effects the phase behavior, conductivity, and micro-emulsification of the microemulsion system during aniline polymerization were investigated by a pseudo-ternary phase diagram of sodium dodecyl benzene sulfonate (SDBS)/n-butanol/aniline/H2O. Our results show that with an increase in alcohol content, the area of the microemulsion region increased initially and then decreased. This area reached a maximumat a Kmof 1.0 and increased under the influence of a MF. Characterization of the pseudo-ternary phase diagram was undertaken by an analysis of the solution conductivity as the water content varied in the presence of a MF. Transmission electron microscopy (TEM) indicated the particle-size of the polyaniline (PAn), which polymerized in the presence of the MF, was much smaller than that of the PAn polymerized in the absence of the MF.

Key words: Microemulsion, Aniline, Magnetic field, Phase behavior, Pseudo-ternary phase diagram