Visco-elastic and adhesive properties of adsorbed polyelectrolyte multilayers determined in situ with QCM-D and AFM measurements

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Title: Visco-elastic and adhesive properties of adsorbed polyelectrolyte multilayers determined in situ with QCM-D and AFM measurements
Author(s): Notley, Shannon M.; Eriksson, Malin; Wagberg, Lars
Abstract: The build-up of multilayers constructed from polyallylamine hydrochloride (PAH) and polyacrylic acid (PAA) under different pH conditions was continuously monitored using the quartz crystal microbalance with dissipation. The adsorbed amount of polymer as well as the amount of coupled water was determined. Furthermore, from dissipation measurements, it was possible to determine the visco-elastic properties of the adsorbed multilayer. These properties were highly dependent on the polyelectrolyte present in the outermost layer. The multilayer was far more rigid and elastic with PAA as the outermost layer. Furthermore, a link has been established between the conformability or rigidity of a multilayer covered surface and the adhesion between such surfaces. Adhesion measurements using the atomic force microscope showed a greater pull-off force when the more viscous PAH was present in the outermost layer.
Publication type: Journal article
Source: Journal of Colloid and Interface Science, Vol. 292, no. 1 (Dec 2005), pp. 29-37
Publication year: 2005
FOR Code(s): 02 Physical Sciences; 03 Chemical Sciences; 09 Engineering
Keyword(s): Acrylic resins; Adhesives; Adsorption; Artificial membranes; Atomic force microscopy; Biological monitoring; Conformations; Dissipation measurements; Elasticity; Electrolytes; Energy dissipation; Force; Hydrogen-ion concentration; Measurement; Multilayers; pH effects; Polyamines; Polycyclic aromatic hydrocarbons; Polyelectrolytes; Polymers; Quartz crystal microbalance with dissipation; Sensitivity; Specificity; Visco-elastic properties; Viscoelasticity; Water
Publisher: Academic Press
ISSN: 0021-9797
Publisher URL: http://dx.doi.org/10.1016/j.jcis.2005.05.057
Peer reviewed