Charging and aggregation of negatively charged colloidal latex particles in the presence of multivalent oligoamine cations

Article Article scientifique Article Charging and aggregation of negatively charged colloidal latex particles in the presence of multivalent oligoamine cations eng 2013 author Szilagyi Istvan 702956 author Polomska Anna 729470 author Citherlet Damian 659507 author Sadeghpour Dilmaghani Amin 665402 author Borkovec Michal 134121 34-41 10.1016/j.jcis.2012.09.058 0021-9797 https://linkinghub.elsevier.com/retrieve/pii/S0021979712011046 Charging and aggregation of negatively charged carboxyl latex particles in the presence of positively charged linear oligoamines containing 1–6 amine groups were investigated by electrophoretic mobility and dynamic light scattering. The oligoamines of low valence resemble simple inert salts and destabilize the suspensions by screening their charge. The oligoamines of higher valence induce overcharging at low concentrations, whereby destabilization is triggered by charge neutralization. At higher concentrations, destabilization is also induced by screening. The onset of first fast aggregation regime scales with the inverse six power of the valence in agreement with the Schulze–Hardy rule. The aggregation rates can be relatively well described by the DLVO theory which indicates that the interactions are governed by van der Waals and electrostatic double layer forces. Coagulation Latex Overcharging Dynamic light cattering Electrophoresis Oligoamine DLVO Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Journal of Colloid and Interface Science 392 1333843b-23b5-46b8-8a7d-dc96134a97ce Article (Published version) Restricted Charging_MB_13.pdf 963936 application/pdf restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

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Charging and aggregation of negatively charged colloidal latex particles in the presence of multivalent oligoamine cations	Journal of Colloid and Interface Science			2013	241	0

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Polomska, Anna