Linear viscoelasticity of liquid crystalline phases for a ethoxylated nonylphenol nonionic surfactant/water system

F. Cordobés; J. E. Moros; J. M. Franco; C. Gallegos

doi:10.3989/gya.2002.v53.i2.299

Linear viscoelasticity of liquid crystalline phases for a ethoxylated nonylphenol nonionic surfactant/water system

Authors

F. Cordobés Dpto. Ingeniería Química. Facultad de Química. Universidad de Sevilla
J. E. Moros Dpto. Ingeniería Química. Facultad de Química. Universidad de Sevilla
J. M. Franco Dpto. Ingeniería Química. Escuela Politécnica Superior
C. Gallegos Dpto. Ingeniería Química. Escuela Politécnica Superior

DOI:

https://doi.org/10.3989/gya.2002.v53.i2.299

Keywords:

Ethoxylated nonylphenol, Linear viscoelasticity, Lyotropic liquid crystal, Maxwell model, Nonionic surfactant

Abstract

In this work the linear viscoelastic behaviour of micelar and liquid-crystalline phases in a polyoxy-ethylene glycol nonylphenyl ether (EO_a=10)/water system was studied. A linear viscoelastic characterization using small amplitude oscillatory tests was carried out. The Maxwell and Generalized Maxwell models fit the linear viscoelastic functions of micellar and hexagonal phases respectively, fairly well. On the other hand, the lamellar phase shows a plateau region characteristic of highly structured systems. As may be deduced from the experimental results, dynamic measurements constitute an effective method to study the structural changes occurring in phase diagrams.

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Published

2002-06-30

How to Cite

Cordobés F, Moros JE, Franco JM, Gallegos C. Linear viscoelasticity of liquid crystalline phases for a ethoxylated nonylphenol nonionic surfactant/water system. Grasas aceites [Internet]. 2002Jun.30 [cited 2024Apr.18];53(2):167-72. Available from: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/299

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Issue

Vol. 53 No. 2 (2002)

Section

Research

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