Interaction between silica in the presence of adsorbed poly(ethyleneimine): correlation between colloidal probe adhesion measurements and yield stress
The interaction forces between silica surfaces with adsorbed layers of polyethyleneimine (PEI) were measured using colloidal probe microscopy as a function of solution conditions and PEI molecular weight. The surface coverage of polymer, as determined from optical reflectometry, was a significant factor influencing the extension of the chains away from the interface and also the development of adhesion between the surfaces. For the high molecular weight PEI (70 kDa), the adhesion passed through...[Show more]
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|Source:||Physical Chemistry Chemical Physics|
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