Alternate multi-layered adsorption of macro-cations and -anions on the colloidal spheres.Influence of the deionization of the complexation mixtures with coexistence of the ion-exchange resins

摘要

The alternate multiple adsorption layers of macrocations and macroanions on the surfaces of colloidal spheres,in which the complexation mixtures are deionized with ion-exchange resins are studied with help of the electrophoretic light-scattering,dynamic light-scattering and transmitted electron-microscopy techniques.The results are compared with those without resins.Colloidal silica spheres (110 nm in diameter)and monodi-spersed polystyrene spheres (220 nm)are used as colloidal spheres.The macrocations used are poly (4-vinyl-N-n-butyl pyridinium bromide)and poly (allylamine hydrochloride).Sodium poly (sty-rene sulfonate)and sodium polyac-rylate are used as macroanions.The macroion-colloid complexations are formed firmly when the complexa-tion suspensions are deionized with the resins.