Rheology of lyotropic liquid crystals of aerosol ot. II. High concentration regime

Oscar Robles-VÁsquez, Sergio Corona-GalvÁn, J. Felix armando Soltero Martinez, Jorge E. Puig, Silvana B. Tripodi, Enrique VallÉs, Octavio Manero

Resultado de la investigación: Contribución a una revistaArtículo

65 Citas (Scopus)

Resumen

Dynamic and steady-shear rheological measurements of the AOT/water lamellar liquid crystalline phase are reported as a function of surfactant concentration. Dynamical measurements indicate that the AOT/water lamellar phase behaves as a weak gel; i.e., both the elastic and the loss moduli, G“ and G” are nearly independent of frequency (ω) and G′ is an order of magnitude greater than G’ in the range 10-2 to 102 s-1. Complex and dynamic viscosities decrease with frequency as ω-1. Steady shear measurements demonstrate a shear thinning behavior with η ∝ γ-1 but η does not tend to a Newtonian plateau at low shear rates. The measured material functions (G’, η*, and η) go through a minimum at around 50 wt% AOT. This minimum is explained in terms of attractive and repulsive colloidal forces in the bilayers and in terms of interactions among the liquid crystalline microdomains.

Idioma originalInglés
Páginas (desde-hasta)65-71
Número de páginas7
PublicaciónJournal of Colloid and Interface Science
Volumen160
N.º1
DOI
EstadoPublicada - 1 oct 1993

Huella dactilar

Liquid Crystals
Aerosols
Rheology
Liquid crystals
Crystalline materials
Shear thinning
Water
Liquids
Surface-Active Agents
Shear deformation
Surface active agents
Gels
Viscosity

Citar esto

Robles-VÁsquez, Oscar ; Corona-GalvÁn, Sergio ; Soltero Martinez, J. Felix armando ; Puig, Jorge E. ; Tripodi, Silvana B. ; VallÉs, Enrique ; Manero, Octavio. / Rheology of lyotropic liquid crystals of aerosol ot. II. High concentration regime. En: Journal of Colloid and Interface Science. 1993 ; Vol. 160, N.º 1. pp. 65-71.
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abstract = "Dynamic and steady-shear rheological measurements of the AOT/water lamellar liquid crystalline phase are reported as a function of surfactant concentration. Dynamical measurements indicate that the AOT/water lamellar phase behaves as a weak gel; i.e., both the elastic and the loss moduli, G“ and G” are nearly independent of frequency (ω) and G′ is an order of magnitude greater than G’ in the range 10-2 to 102 s-1. Complex and dynamic viscosities decrease with frequency as ω-1. Steady shear measurements demonstrate a shear thinning behavior with η ∝ γ-1 but η does not tend to a Newtonian plateau at low shear rates. The measured material functions (G’, η*, and η) go through a minimum at around 50 wt{\%} AOT. This minimum is explained in terms of attractive and repulsive colloidal forces in the bilayers and in terms of interactions among the liquid crystalline microdomains.",
author = "Oscar Robles-V{\'A}squez and Sergio Corona-Galv{\'A}n and {Soltero Martinez}, {J. Felix armando} and Puig, {Jorge E.} and Tripodi, {Silvana B.} and Enrique Vall{\'E}s and Octavio Manero",
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Robles-VÁsquez, O, Corona-GalvÁn, S, Soltero Martinez, JFA, Puig, JE, Tripodi, SB, VallÉs, E & Manero, O 1993, 'Rheology of lyotropic liquid crystals of aerosol ot. II. High concentration regime', Journal of Colloid and Interface Science, vol. 160, n.º 1, pp. 65-71. https://doi.org/10.1006/jcis.1993.1368

Rheology of lyotropic liquid crystals of aerosol ot. II. High concentration regime. / Robles-VÁsquez, Oscar; Corona-GalvÁn, Sergio; Soltero Martinez, J. Felix armando; Puig, Jorge E.; Tripodi, Silvana B.; VallÉs, Enrique; Manero, Octavio.

En: Journal of Colloid and Interface Science, Vol. 160, N.º 1, 01.10.1993, p. 65-71.

Resultado de la investigación: Contribución a una revistaArtículo

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T1 - Rheology of lyotropic liquid crystals of aerosol ot. II. High concentration regime

AU - Robles-VÁsquez, Oscar

AU - Corona-GalvÁn, Sergio

AU - Soltero Martinez, J. Felix armando

AU - Puig, Jorge E.

AU - Tripodi, Silvana B.

AU - VallÉs, Enrique

AU - Manero, Octavio

PY - 1993/10/1

Y1 - 1993/10/1

N2 - Dynamic and steady-shear rheological measurements of the AOT/water lamellar liquid crystalline phase are reported as a function of surfactant concentration. Dynamical measurements indicate that the AOT/water lamellar phase behaves as a weak gel; i.e., both the elastic and the loss moduli, G“ and G” are nearly independent of frequency (ω) and G′ is an order of magnitude greater than G’ in the range 10-2 to 102 s-1. Complex and dynamic viscosities decrease with frequency as ω-1. Steady shear measurements demonstrate a shear thinning behavior with η ∝ γ-1 but η does not tend to a Newtonian plateau at low shear rates. The measured material functions (G’, η*, and η) go through a minimum at around 50 wt% AOT. This minimum is explained in terms of attractive and repulsive colloidal forces in the bilayers and in terms of interactions among the liquid crystalline microdomains.

AB - Dynamic and steady-shear rheological measurements of the AOT/water lamellar liquid crystalline phase are reported as a function of surfactant concentration. Dynamical measurements indicate that the AOT/water lamellar phase behaves as a weak gel; i.e., both the elastic and the loss moduli, G“ and G” are nearly independent of frequency (ω) and G′ is an order of magnitude greater than G’ in the range 10-2 to 102 s-1. Complex and dynamic viscosities decrease with frequency as ω-1. Steady shear measurements demonstrate a shear thinning behavior with η ∝ γ-1 but η does not tend to a Newtonian plateau at low shear rates. The measured material functions (G’, η*, and η) go through a minimum at around 50 wt% AOT. This minimum is explained in terms of attractive and repulsive colloidal forces in the bilayers and in terms of interactions among the liquid crystalline microdomains.

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