Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Record number 352771
Title Sorption of poly(vinyl alcohol) and its cationic derivative on silica oxide: effect of charge
Author(s) Liesiene, J.; Matulioniene, J.; Aniulyte, J.; Keizer, A. de
Source Chemical Technology 2 (2005)36. - ISSN 1392-1231 - p. 51 - 56.
Department(s) Physical Chemistry and Colloid Science
Publication type Refereed Article in a scientific journal
Publication year 2005
Abstract Adsorption of poly(vinyl alcohol)-based cationic polyelectrolyte (DEAE-PVA) as well as unmodified poly(vinyl alcohol) (PVA) onto silica oxide surface was studied by means of reflectometry. The study was focused on the effect of charge of polymer segments on their adsorption on silica oxide. The results showed that the adsorption rate depended on the polymer concentration and was significantly higher for polyelectrolyte than for unmodified PVA. The maximum adsorbed value at the same pH did not depend on polymer concentration. The adsorption of both polymers on silica oxide was highly affected by pH. To explain the reasons, the zeta potential of the silicagel surface as well as of the polymers was measured. The highest sorption of DEAE-PVA was reached at pH above 6 when the gel surface and DEAE-PVA were charged oppositely. It was presumed that the DEAE-PVA adsorption was strongly affected by the electrostatic interaction between dissociated silanols and amino groups of the polymer. The coated silica oxide surface was characterized by atomic force microscopy. The water contact angles showed that the coated surfaces were more hydrophilic and possessed better wetting abilities than the surface of uncoated silica oxide
There are no comments yet. You can post the first one!
Post a comment
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.