Acid-base equilibria of weak polyelectrolytes in multilayer thin films

摘要: In this paper, we report on the local apparent dissociation constants of poly(acrylic acid) and poly(allylamine hydrochloride) incorporated in polyelectrolyte multilayer thin films. We assembled 10 layers colloidal silica by sequential electrostatic adsorption polyacid polybase from aqueous solutions at different pH values then measured zeta potential as a function solution to determine pKa(app) each surface layer. The results suggest that constant decreases upon for increases case hydrochloride). These deviations ideal behavior can be substantial, changing much 4 units, shifts become more pronounced number adsorbed increases. addition, found these are influenced used assemble films but show little dependence salt concentration assembly baths.