Refractive index, Mass Density and Shear Viscosity near the Liquid-Liquid Critical Point of a mixture with an ionic impurity
A. Toumi, and M. Bouanz. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
Abstract
We have investigated the (K+, Cl-) ions effect on the refractive index (n), on the mass density ($\rho$) and on the shear viscosity ($\eta$) in the homogeneous phase above the higher critical solution point in critical-composition liquid mixture isobutyric acid + water (I-W). For the pure critical system (I-W), both critical exponents ($\alpha$) and $y$, respectively obtained by the techniques of density ($\rho$) and refractive index (n) on the one hand, and by shear viscosity ($\eta$) on the other hand, agree well with (d = 3)-dimensional Ising value established not only by renormalisation group (RG) calculation, but also by extensive high-T series expansions and Monte Carlo simulations. Concerning the exponent , with (K+, Cl-) ions at weak concentrations, the critical mixture (I-W) exhibits critical behaviour in favour of Ising critical exponent asymptotically close to the critical point. However, the critical exponent y value connected to the critical anomaly of shear viscosity is found smaller than the one predicted by dynamic renormalisazation group and mode-coupling theories. Furthermore, the decrease of the critical amplitude of the viscosity caused by the ionic impurity is attributed to the strengthening of the solute-solvent interaction which causes the increase of the water-solute clusters.
%0 Book Section
%1 statphys23_0981
%A Toumi, A.
%A Bouanz, M.
%B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics
%C Genova, Italy
%D 2007
%E Pietronero, Luciano
%E Loreto, Vittorio
%E Zapperi, Stefano
%K critical density impurity index ionic liquids phenomena refractive shear statphys23 topic-2 viscosity
%T Refractive index, Mass Density and Shear Viscosity near the Liquid-Liquid Critical Point of a mixture with an ionic impurity
%U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=981
%X We have investigated the (K+, Cl-) ions effect on the refractive index (n), on the mass density ($\rho$) and on the shear viscosity ($\eta$) in the homogeneous phase above the higher critical solution point in critical-composition liquid mixture isobutyric acid + water (I-W). For the pure critical system (I-W), both critical exponents ($\alpha$) and $y$, respectively obtained by the techniques of density ($\rho$) and refractive index (n) on the one hand, and by shear viscosity ($\eta$) on the other hand, agree well with (d = 3)-dimensional Ising value established not only by renormalisation group (RG) calculation, but also by extensive high-T series expansions and Monte Carlo simulations. Concerning the exponent , with (K+, Cl-) ions at weak concentrations, the critical mixture (I-W) exhibits critical behaviour in favour of Ising critical exponent asymptotically close to the critical point. However, the critical exponent y value connected to the critical anomaly of shear viscosity is found smaller than the one predicted by dynamic renormalisazation group and mode-coupling theories. Furthermore, the decrease of the critical amplitude of the viscosity caused by the ionic impurity is attributed to the strengthening of the solute-solvent interaction which causes the increase of the water-solute clusters.
@incollection{statphys23_0981,
abstract = {We have investigated the (K+, Cl-) ions effect on the refractive index (n), on the mass density ($\rho$) and on the shear viscosity ($\eta$) in the homogeneous phase above the higher critical solution point in critical-composition liquid mixture isobutyric acid + water (I-W). For the pure critical system (I-W), both critical exponents ($\alpha$) and $y$, respectively obtained by the techniques of density ($\rho$) and refractive index (n) on the one hand, and by shear viscosity ($\eta$) on the other hand, agree well with (d = 3)-dimensional Ising value established not only by renormalisation group (RG) calculation, but also by extensive high-T series expansions and Monte Carlo simulations. Concerning the exponent , with (K+, Cl-) ions at weak concentrations, the critical mixture (I-W) exhibits critical behaviour in favour of Ising critical exponent asymptotically close to the critical point. However, the critical exponent y value connected to the critical anomaly of shear viscosity is found smaller than the one predicted by dynamic renormalisazation group and mode-coupling theories. Furthermore, the decrease of the critical amplitude of the viscosity caused by the ionic impurity is attributed to the strengthening of the solute-solvent interaction which causes the increase of the water-solute clusters.},
added-at = {2007-06-20T10:16:09.000+0200},
address = {Genova, Italy},
author = {Toumi, A. and Bouanz, M.},
biburl = {https://www.bibsonomy.org/bibtex/2f675eed6a45988a99a6e0fd4dc01348a/statphys23},
booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics},
editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano},
interhash = {f7e8cc021863a9706d96ec47dc499a2c},
intrahash = {f675eed6a45988a99a6e0fd4dc01348a},
keywords = {critical density impurity index ionic liquids phenomena refractive shear statphys23 topic-2 viscosity},
month = {9-13 July},
timestamp = {2007-06-20T10:16:36.000+0200},
title = {Refractive index, Mass Density and Shear Viscosity near the Liquid-Liquid Critical Point of a mixture with an ionic impurity},
url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=981},
year = 2007
}