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Titolo: THE STABILITY OF CHARGED COLLOIDS  ATTRACTIVE DOUBLELAYER FORCES DUE TO ASYMMETRIC CHARGEDISTRIBUTION
Autore: SJOSTROM L; AKESSON T;
 Indirizzi:
 CHEM CTR LUND,POB 124 S22100 LUND SWEDEN
 Titolo Testata:
 Journal of colloid and interface science
fascicolo: 2,
volume: 181,
anno: 1996,
pagine: 645  653
 SICI:
 00219797(1996)181:2<645:TSOCC>2.0.ZU;2I
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 POLYELECTROLYTE ADSORPTION; POISSONBOLTZMANN EQUATION; WEAK POLYELECTROLYTES; IONICSTRENGTH; SURFACES; CRYSTALS;
 Keywords:
 POLYELECTROLYTE; ASYMMETRIC SYSTEMS; ATTRACTIVE FORCES; ELECTRIC DOUBLE LAYER;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 26
 Recensione:
 Indirizzi per estratti:



 Citazione:
 L. Sjostrom e T. Akesson, "THE STABILITY OF CHARGED COLLOIDS  ATTRACTIVE DOUBLELAYER FORCES DUE TO ASYMMETRIC CHARGEDISTRIBUTION", Journal of colloid and interface science, 181(2), 1996, pp. 645653
Abstract
The interaction between one charged surface with terminally grafted polyelectrolyte chains and one similarly charged surface neutralized bymobile counterions is investigated by Monte Carlo simulations. It is found that the force between the surfaces differs significantly from the forces obtained in symmetric systems. Due to entropic contributionsthe counterions penetrate into the halfcell containing polyelectrolyte, giving rise to an attractive force component of considerable strength between the subsystems. This force is affected by the chain structure of the polyelectrolyte and becomes more attractive with increasingflexibility. Asymptotic behavior, as well as salt dependence, of the surface force is estimated by mean field calculations on a related model system. Longrange attraction in asymmetric systems has recently been observed experimentally by surface forcedistance measurements. (C)1996 Academic Press, Inc.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 16:29:07