Adsorption of poly(isobutenylsuccinimide) dispersants at a solid-hydrocarbon interface

Yves Chevalier (1) , Marie-Claude Dubois-Clochard (2) , Jean-Pierre Durand (2) , Bruno Delfort (2) , Patrick Gateau (2) , Loïc Barré (2) , Didier Frot (2) , Yves Briolant (2) , Isabelle Blanchard (2) , Roger Gallo (3)

1 LMOPS - Matériaux organiques à propriétés spécifiques
2 IFPEN - IFP Energies nouvelles
3 LIPI - ENSSPICAM - Laboratoire d'Ingénierie des Projets Industriels, Ecole Nationale Supérieure de Synthèses, de Procédés et d'Ingénierie Chimiques d'Aix-Marseille

The adsorption at the solid—xylene interface of poly(isobutenyl-succinimides) (PIBSI) has been studied on carbon black by means of adsorption isotherms and small-angle neutron scattering. Simple diblock PIBSI having various chemical structures and poly(PIBSI) with a comblike structure were compared. The adsorption is due to the hydrophilic polyamine part. It was related to the chemical structure of the dispersants (length of the polyamine part, simple diblock structure versus comblike). The adsorption phenomenon was irreversible at low concentrations; the adsorbed macromolecules are fully stretched and form a monolayer of 30-Å thickness. The consequences for the colloidal stability of carbon black dispersions in xylene were analyzed by means of quasielastic light scattering and rheology measurements.

Domaines: Matériaux; Polymères

Yves Chevalier, Marie-Claude Dubois-Clochard, Jean-Pierre Durand, Bruno Delfort, Patrick Gateau, et al.. Adsorption of poly(isobutenylsuccinimide) dispersants at a solid-hydrocarbon interface. Trends in Colloid and Interface Science XV, 118, Springer Berlin Heidelberg, pp.110-114, 2001, Progress in Colloid and Polymer Science, ⟨10.1007/3-540-45725-9_25⟩. ⟨hal-02869165⟩