Revisiting Polymer-Particle Interaction in PEO Solutions.

ABSTRACT: We have measured the electrophoretic mobility and diffusion coefficient of carboxylate-modified and sulfate-modified polystyrene latex particles in poly(ethylene oxide) aqueous solutions. Carboxylate-modified polystyrene particles have shown a bound polymeric layer as the surface net charge vanishes even at very low poly(ethylene oxide) concentration. The polymeric layer causes a lower electrophoretic mobility and slower Brownian diffusion than that corresponding to the bare particles. We show that the diffusion is the result of a significantly increased effective particle size 2r_heff = 30 nm. This bound layer is not present in sulfate-modified polystyrene latex particles. The interaction between the carboxylate-modified particle surface and the m

SUBMITTER: Espasa-Valdepenas A 

PROVIDER: S-EPMC9132384 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature