Mixed Micellar Properties of DPC with Other Cationic Surfactants (DTAB, TTAB, and CDEAB)

DPC와 다른 양이온성 계면활성제(DTAB, TTAB 및 CDEAB)와의 혼합마이셀화에 관한 연구

  • Lee, Byung Hwan (Department of Applied Chemical Engineering, Korean University of Technology)
  • 이병환 (한국기술교육대학교 응용화학공학과)
  • Published : 19981000

Abstract

The critical micelle concentration $(CMC^{\ast})$ and the counterion binding constant (B) in a micellar state of the mixed surfactant systems of dodecylpyridinium chloride (DPC) with dodecyltrimethylammonium bromide (DTAB), tetradecyltrimethylammonium bromide (TTAB), and cetyldimethylethylammonium bromide (CDEAB) were determined at $25^{\circ}C$ as a function of ${\alpha}_1$ (the overall molc fraction of DPC) by the use of electric conductivity method. Various thermodynamic parameters $(X_{i},\;{\gamma}_{I},\;C_{i},\;a^{M}_{i}, \beta,\;{\Delta}H_{mix}, \;and\; {\Delta}G^{o}_{m})$ for the micellization of DPC/DTAB, DPC/TTAB, and DPC/CDEAB mixtures were calculated and analyzed for each system by means of the equations derived from the pseudophase separation model. The results show that the DPC/DTAB mixed system has the greatest deviation and the DPC/CDEAB mixed system has the smallest deviation from the ideal mixed micellar model.

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References

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