The Study of Salt Induced Viscoelastic Wormlike Micelles in Aqueous Systems of Mixed Anionic/Nonionic Surfactants

Authors

  • Rekha Goswami Shrestha School of Environment and Information Sciences
  • Kenji Aramaki School of Environment and Information Sciences

DOI:

https://doi.org/10.3126/jncs.v23i0.2098

Keywords:

Nonionic surfactant, Wormlike micelles, Rheology, Viscoelastic solutions

Abstract

Formation of viscoelastic wormlike micelles in aqueous systems of mixed amino acid based anionic and nonionic surfactants in presence of salt is presented. N-dodecylglutamic acid (LAD) upon neutralization with L-Lysine in 1:2 mole ratio forms globular type of micelles above critical micelle concentration and the solution follows Newtonian fluid like behavior at 25ºC. The addition of tri(oxyethylene) nmonotetradecyl ether (C14EO3) to the semi-dilute aqueous solution of the LADLysine-2 induces one dimensional micellar growth and viscosity of solution increases. After a certain concentration of C14EO3 micelles get entangled and form a rigid network of wormlike micelles and viscosity increases by several orders of magnitude. The wormlike micellar solutions show a viscoelastic character and can be described the Maxwell mechanical model with a single stress relaxation. Rheological measurements have shown that zero shear viscosity (No) increases with the C14EO3 concentration gradually at first sharpl, and then finally decreases before phase separation.

Keywords: nonionic surfactant, wormlike micelles, rheology, viscoelastic solutions

DOI: 10.3126/jncs.v23i0.2098

J. Nepal Chem. Soc., Vol. 23, 2008/2009 Page: 65-73

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Author Biographies

Rekha Goswami Shrestha, School of Environment and Information Sciences

Professor, Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai 79-7, Hodogaya-ku, Yokohama 240-8501, Japan.

 

Kenji Aramaki, School of Environment and Information Sciences

Professor, Graduate School of Environment and Information Sciences, Yokohama National University, Tokiwadai 79-7, Hodogaya-ku, Yokohama 240-8501, Japan.

 

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How to Cite

Shrestha, R. G., & Aramaki, K. (2009). The Study of Salt Induced Viscoelastic Wormlike Micelles in Aqueous Systems of Mixed Anionic/Nonionic Surfactants. Journal of Nepal Chemical Society, 23, 65–73. https://doi.org/10.3126/jncs.v23i0.2098

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