Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (03): 541-546.doi: 10.3866/PKU.WHXB20100244

• THERMODYNAMICS,THERMOCHEMISTRY AND SOLUTION CHEMISTRY • Previous Articles     Next Articles

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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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