Charging and stability of anionic latex particles in the presence of linear poly(ethylene imine)

Article Article scientifique Article Charging and stability of anionic latex particles in the presence of linear poly(ethylene imine) eng 2011 author Szilagyi Istvan 702956 author Rosicka Dana 734172 author Hierrezuelo Osorio Jose Manuel 673934 author Borkovec Michal 134121 580-585 10.1016/j.jcis.2011.04.106 0021-9797 https://linkinghub.elsevier.com/retrieve/pii/S0021979711005546 Charging properties and colloidal stability of negatively charged polystyrene latex particles were investigated in the presence of linear poly(ethylene imine) (LPEI) of different molecular masses by electrophoresis and dynamic light scattering (DLS). Electrophoretic mobility measurements illustrate that LPEI strongly adsorbs on these particles leading to charge neutralization at isoelectric point (IEP) and charge reversal. Time-resolved DLS experiments indicate that the aggregation of the latex particles is rapid near the IEP and slows down away from this point. Surprisingly, the colloidal stability does not depend on the molecular mass, which indicates that the adsorbed LPEI layer is rather homogeneous. Polyethylenimine Electrophoresis Dynamic light scattering Overcharging Aggregation Flocculation Coagulation Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Journal of Colloid and Interface Science 360 2 1d2f5f9c-edde-4eae-9cbd-e7f57e5154d9 Article (Published version) Restricted Charging_MB_11.pdf 613137 application/pdf restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Charging and stability of anionic latex particles in the presence of linear poly(ethylene imine)	Journal of Colloid and Interface Science			2011	212	0

Archive ouverte UNIGE

Rosicka, Dana