Adsorption of poly(ethyleneglycol) and poly(amidoamine)dendrimer from their mixtures on alumina/water and silica/water interfaces

Authors
Esumi, K Nakaie, Y Sakai, K Torigoe, K
Citation
K. Esumi et al., Adsorption of poly(ethyleneglycol) and poly(amidoamine)dendrimer from their mixtures on alumina/water and silica/water interfaces, COLL SURF A, 194(1-3), 2001, pp. 7-12
Citations number
16
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN journal
09277757 → ACNP
Volume
194
Issue
1-3
Year of publication
2001
Pages
7 - 12
Database
ISI
SICI code
0927-7757(200112)194:1-3<7:AOPAPF>2.0.ZU;2-S
Abstract
Adsorption behaviors of poly(ethyleneglycol) and poly(amidoamine)dendrimer with surface carboxyl group on alumina and silica in aqueous solutions were studied at pH 5. Poly(amidoamine)dendrimer adsorbed considerably on both a lumina and silica, while poly(ethyloneglycol) adsorbed preferably on silica to alumina. In a simultaneous adsorption of poly(ethyleneglycol) and poly( amidoamine)dendrimer at a constant initial concentration of poly(ethylenegl ycol), competitive effects are for poly(ethyleneglycol) at all concentratio ns and for poly(amidoamine)dendrimer at higher concentrations only for both alumina and silica particles. The C potential and sedimentation rates of t he suspensions were affected by adsorption of the polymers. The adsorption mechanism of the polymers on alumina and silica was discussed. (C) 2001 Els evier Science B.V. All rights reserved.