Effect of ammoniun bromide and chloride addition on the formation of micelles of cetyltrimethylammonium

Authors

  • Vania R. G. Polli Departamento de Física, Centro de Ciências Naturais e Exatas - CCNE Universidade Federal de Santa Maria - UFSM, Santa Maria, RS.
  • Gláucia U. Soares Departamento de Física, Centro de Ciências Naturais e Exatas - CCNE Universidade Federal de Santa Maria - UFSM, Santa Maria, RS.
  • Lavinel G. Ionescu Instituto de Química, UFRGS, Porto Alegre, RS.

DOI:

https://doi.org/10.5902/2179460X25534

Abstract

The formation of micellar aggregates with cetyltrimethylammoniun bromide (CTAB) in aqueous salt solutions (NH4Br and NH4Cl) was studied by means of tensiometric and viscosimetric techniques. The experimental results indicated that the formation of micelles is enhanced by the addition of salt. The micellar system changes from spherical at low NH4Cl and NH4Br concentrations to elliptical and eventually liquid crystalline mesophases at higher sal concentration.

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References

IONESCU, L.G.; ROMANESCO, L.S.; NOME, F. The effect of cosolvents of the formation of micelles of cetyltrimethylammonium bromide in aqueous solutions. In: MITTAL, K.L. & LINDMAN, B. 1984. surfactants in solution. Plenum Publishing Corporation, Vo1. 2, p. 789-803, 1984.

IONESCU, L.G. Effect of additives on the formation of micelles in aqueous solutions. Contrib. Cient. Tecnol., Santiago, p.35-9, 1985. (N9 especial)

IONESCU, L.G. Effect of additives on the formation of micellar aggregates in aqueous solution. In: INTERNATIONAL SIMPOSIUM ON SURFACTANTS, 6º, New Delhi, Augus 18-22, 1986. Anais... New Delhi ISSST, IITD, p. 14,1986.

IONESCU, L.G. Quasi-elastic light scattering of cetyltrimethylammonium bromide in aqueous salt solutions. Química Nova, Campinas, 8(3):191-2,1985.

TEIXEIRA, E. Formação de micelas de haletos de cetiltrimetilamônio em água na presença de brometo e cloreto de sódio. 180 f. Tese (Mestr. Ciência.), Universidade Federal de Santa Catarina, Florianópolis, 1983.

IONESCU, L.G.; ROMANESCO, L.S.; AIDO, T.H.M. Aggregation of cetyltrimethylammonium bromide (CTAB) in aqueous solutions containing sodium chloride. Bol. Soc. Chil, Quim. 9p., s.d.

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Published

1989-12-11

How to Cite

Polli, V. R. G., Soares, G. U., & Ionescu, L. G. (1989). Effect of ammoniun bromide and chloride addition on the formation of micelles of cetyltrimethylammonium. Ciência E Natura, 11(11), 77–82. https://doi.org/10.5902/2179460X25534

Issue

CIÊNCIA E NATURA, V. 11, N. 11, 1989

Section

Articles

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