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Electrostatic Effects: Charged surfaces and polyelectrolyte adsorption

  • G. J. Fleer
  • M. A. Cohen Stuart
  • J. M. H. M. Scheutjens
  • T. Cosgrove
  • B. Vincent
Chapter

Abstract

When charges are present in a macromolecular solution near a surface, several features show up that do not play a role in uncharged systems. If the polymer is charged, the mutual repulsion between the segments opposes accumulation in the surface region. If, in addition, the surface carries a charge, there is an electrostatic contribution to the segment-surface interaction that either promotes or counteracts the adsorption, depending on the signs of the charges. Since electrostatic forces are screened by electrolytes, the salt concentration becomes an important variable. So does the pH if the polyelectrolyte (or the surface groups) are weak. For weak polyelectrolytes an additional complication arises in that the degree of dissociation becomes a function of the local concentrations, i.e., of the distance from the surface.

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Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • G. J. Fleer
  • M. A. Cohen Stuart
  • J. M. H. M. Scheutjens
  • T. Cosgrove
  • B. Vincent

There are no affiliations available

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