A review. Aq. mixts. contg. ionic surfactants and polymers show significant modifications in their physico-chem. properties when the surfactant concn. exceeds a crit. value. Addn. of surfactants, in fact, promotes the adsorption of micelle-like aggregates onto the polymer backbone, up to satn. of its binding-sites. On increasing the surfactant content above the satn. threshold free micelles coexist with the surfactant-satd. polymer. Temp., ionic strength and the nature of surfactant and polymer play a significant role in the interactions between polymers and surfactants. Polymer-surfactant interactions influence the phase behavior of systems contg. water, surfactant and polymer. Significant differences are obsd. when the polymer is non-ionic or bears opposite charges with respect to the surfactant. In the latter case electrostatic effects become dominant with respect to ion-dipole, or hydrophobic, interactions, with dramatic consequences on the soln. behavior and on the equil. between coexisting phases. NMR, thermodn. and kinetic methods were extensively used to study some physico-chem. properties of polymer-surfactant systems, PSS. From the above findings information on the adsorption of micelles onto polymer binding-sites (and on the related thermodn. properties), on aggregate size and on the kinetics of matter exchange between the bulk and polymer-bound micelles is obtained.

INTERACTIONS BETWEEN SURFACTANTS AND POLYMERS / Sesta, B.; LA MESA, Camillo. - STAMPA. - 5:(2002), pp. 261-270.

INTERACTIONS BETWEEN SURFACTANTS AND POLYMERS

LA MESA, Camillo
2002

Abstract

A review. Aq. mixts. contg. ionic surfactants and polymers show significant modifications in their physico-chem. properties when the surfactant concn. exceeds a crit. value. Addn. of surfactants, in fact, promotes the adsorption of micelle-like aggregates onto the polymer backbone, up to satn. of its binding-sites. On increasing the surfactant content above the satn. threshold free micelles coexist with the surfactant-satd. polymer. Temp., ionic strength and the nature of surfactant and polymer play a significant role in the interactions between polymers and surfactants. Polymer-surfactant interactions influence the phase behavior of systems contg. water, surfactant and polymer. Significant differences are obsd. when the polymer is non-ionic or bears opposite charges with respect to the surfactant. In the latter case electrostatic effects become dominant with respect to ion-dipole, or hydrophobic, interactions, with dramatic consequences on the soln. behavior and on the equil. between coexisting phases. NMR, thermodn. and kinetic methods were extensively used to study some physico-chem. properties of polymer-surfactant systems, PSS. From the above findings information on the adsorption of micelles onto polymer binding-sites (and on the related thermodn. properties), on aggregate size and on the kinetics of matter exchange between the bulk and polymer-bound micelles is obtained.
2002
polymer; surfactant; mixtures
01 Pubblicazione su rivista::01a Articolo in rivista
INTERACTIONS BETWEEN SURFACTANTS AND POLYMERS / Sesta, B.; LA MESA, Camillo. - STAMPA. - 5:(2002), pp. 261-270.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/82131
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