Conference paper

Adsorption of Oligo- and Polypeptides as Model Polyelectrolytes

Benedict C. Bonekamp ; Laboratory for Physical and CoHoid Chemistry of the Agricuitural Universit_y · De Dreijen 6, 6703 BC Wageningen, The Netherlands
Hendrik A. van der Schee ; Laboratory for Physical and CoHoid Chemistry of the Agricuitural Universit_y · De Dreijen 6, 6703 BC Wageningen, The Netherlands
Johannes Lyklema ; Laboratory for Physical and CoHoid Chemistry of the Agricuitural Universit_y · De Dreijen 6, 6703 BC Wageningen, The Netherlands

Abstract

The adsorption of oligo- and polylysines on silver iodide and
polystyrene latex has been measured as a function of concentration,
pH and ionic strength w. At low pH, polylysine adsorbs in
a flat conformation. Loops start to develop if the pH is increased
or if w is raised. The electrolyte effect persists up to very high '
concentrations. The principles and some results of a new polyelectrolyte
adsorption theory are outlined. It explains the experimentally
observed features at least semiquantitatively. The segment
density profile of a polyelectrolyt adsorbate does not resemble that
of an uncharged macromolecule. It depends on the charge on the
chain and on w and under certain conditions it contains a region
of negative adsorption.

Keywords

Hrčak ID:

194191

URI

https://hrcak.srce.hr/194191

Publication date:

9.11.1983.

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