Stability and Adsorption Properties of Electrostatic Complexes: Design of Hybrid Nanostructures for Coating Applications

Ling Qi (1) , Jean-Paul Chapel (1) , Jean-Christophe Castaing (1) , Jérôme Fresnais (2, 3) , Jean-Francois Berret (3)

1 PCMAC - Physico-chimie des milieux aqueux complexes
2 PHENIX - PHysicochimie des Electrolytes et Nanosystèmes InterfaciauX
3 MSC - Matière et Systèmes Complexes

We report the presence of a correlation between the bulk and interfacial properties of electrostatic coacervate complexes. Complexes were obtained by coassembly between cationic-neutral diblocks and oppositely charged surfactant micelles or 7 nm cerium oxide nanoparticles. Light scattering and reflectometry measurements revealed that the hybrid nanoparticle aggregates were more stable through both dilution and rinsing (from either a polystyrene or a silica surface) than their surfactant counterparts. These findings were attributed to a marked difference in critical association concentration between the two systems and to the frozen state of the hybrid structures.

Domaines: Chimie; Matériaux; Polymères; Matière Molle [cond-mat.soft]; Biomécanique [physics.med-ph]

Ling Qi, Jean-Paul Chapel, Jean-Christophe Castaing, Jérôme Fresnais, Jean-Francois Berret. Stability and Adsorption Properties of Electrostatic Complexes: Design of Hybrid Nanostructures for Coating Applications. Langmuir, 2007, 23 (24), pp.11996-11998. ⟨10.1021/la702074j⟩. ⟨hal-02173480v2⟩