Characterization of Carboxylated Nanolatexes by Capillary Electrophoresis - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Langmuir Année : 2011

Characterization of Carboxylated Nanolatexes by Capillary Electrophoresis

Résumé

Poly(styrene-co-acrylic acid) (St/AA) and poly(styrene-co-methacrylic acid) (St/MA) nanolatexes with different acid contents were prepared by emulsion copolymerization and were analyzed by capillary electrophoresis (CE) and by laser doppler velocimetry (LDV). Due to the intrinsic differences in the methodologies, CE (separative technique) and LDV (zetametry, nonseparative technique) lead to very different electrophoretic mobility distributions. Beyond these differences, the variation of the electrophoretic mobility is a complex and nonlinear function of the hydrodynamic radius, the ionic strength, and the zeta potential. To gain better insight on the influence of the ionic strength and the acid content on the electrophoretic behavior of the nanolatexes, the electrophoretic mobility data were changed into surface charge densities using the O'Brien, White, and Ohshima modeling. This approach leads to the conclusion that the surface charge density is mainly controlled at high ionic strength (∼50 mM) by the adsorption of anionic surfactants coming from the sample. On the contrary, at low ionic strength, and/or in the presence of neutral surfactant in the electrolyte, the acid content was the main parameter controlling the surface charge density of the nanolatexes.

Domaines

Chimie organique
Fichier non déposé

Dates et versions

hal-00772451 , version 1 (10-01-2013)

Identifiants

Citer

Farid Oukacine, Aurélie Morel, Hervé Cottet. Characterization of Carboxylated Nanolatexes by Capillary Electrophoresis. Langmuir, 2011, 27, pp.4040-4047. ⟨10.1021/1a1048562⟩. ⟨hal-00772451⟩
164 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More