TY - JOUR
T1 - The ζ-potential for a concentrated colloidal dispersion
T2 - The colloidal primitive model vs. the cell model
AU - Manzanilla-Granados, Héctor M.
AU - Jiménez-Ángeles, Felipe
AU - Lozada-Cassou, Marcelo
PY - 2011/2/20
Y1 - 2011/2/20
N2 - The colloidal primitive model (CPM) for a concentrated colloidal dispersion is studied through the well established hypernetted chain/mean spherical approximation integral equations theory (HNC/MSA-CPM). For comparison the corresponding cell model (CM) theory and other simpler approaches are calculated. Important deviations of the CM results, are found: The HNC/MSA-CPM theory predicts a polarity inversion of ζ-potential for several conditions, always associated with charge reversal, whereas none of the other approaches predict such an inversion. We discuss the possible implications of our results in relation to electrophoretic mobility.
AB - The colloidal primitive model (CPM) for a concentrated colloidal dispersion is studied through the well established hypernetted chain/mean spherical approximation integral equations theory (HNC/MSA-CPM). For comparison the corresponding cell model (CM) theory and other simpler approaches are calculated. Important deviations of the CM results, are found: The HNC/MSA-CPM theory predicts a polarity inversion of ζ-potential for several conditions, always associated with charge reversal, whereas none of the other approaches predict such an inversion. We discuss the possible implications of our results in relation to electrophoretic mobility.
KW - Cell model
KW - Colloidal primitive model
KW - Concentrated colloidal dispersion
KW - Integral equations
KW - Poisson-Boltzmann
KW - ζ-potential
UR - http://www.scopus.com/inward/record.url?scp=79651471086&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2010.11.005
DO - 10.1016/j.colsurfa.2010.11.005
M3 - Artículo
SN - 0927-7757
VL - 376
SP - 59
EP - 66
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -