Abstract

Sequential addition of anionic and cationic polyelectrolytes may lead to the formation of multilayers at a solid surface. The buildup of such multilayers is characterized by a stepwise increase of the adsorbed amount and layer thickness and by alternating highly positive and highly negative values for the ζ-potential. The prime variables which determine the stability of these structures are the polymer charge and the ionic strength. Very stable multilayers are formed when both polymers are highly charged and when the ionic strength is low. For weakly stable multilayers complexation at the surface may first occur, followed by desorption of the complexes. For strongly charged polyelectrolytes the charge stoichiometry, which is not always 1:1, seems to be unique for each pair of polyelectrolytes; no influence of the substrate, of the pH, or of the ionic strength could be observed.

Keywords

PolyelectrolyteIonic strengthChemical physicsIonic bondingPolymerCationic polymerizationDesorptionChemistrySubstrate (aquarium)AdsorptionChemical engineeringPolyelectrolyte adsorptionSurface chargePolymer chemistryIonPhysical chemistryAqueous solutionOrganic chemistry

Affiliated Institutions

Related Publications

Publication Info

Year
1996
Type
article
Volume
12
Issue
15
Pages
3675-3681
Citations
405
Access
Closed

External Links

View on DOI.org

Social Impact

Altmetric
PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

405
OpenAlex

Cite This

Nynke G. Hoogeveen, Martien A. Cohen Stuart, G. J. Fleer et al. (1996). Formation and Stability of Multilayers of Polyelectrolytes. Langmuir , 12 (15) , 3675-3681. https://doi.org/10.1021/la951574y

Identifiers

DOI
10.1021/la951574y