par Gallez, Dominique 
;Prévost, Martine
Référence Colloids and surfaces. A, Physicochemical and engineering aspects, 10, page (123-131)
Publication Publié, 1984
;Prévost, Martine Référence Colloids and surfaces. A, Physicochemical and engineering aspects, 10, page (123-131)
Publication Publié, 1984
Article révisé par les pairs
| Résumé : | The stability of the aqueous film between two charged lipidic bilayers is investigated in order to express such phenomena as vesicle aggregation and fusion in model form. The three phases (the two external lipid phases and the internal electrolytic solution) are considered as viscous fluids and an intrinsic surface rheology is ascribed to the charged surface layers. The dynamic behaviour of the system, submitted to small fluctuations is analysed. A complete balance of forces is taken into account: at long approach distances the long-range repulsive electrical forces are due to the overlap of the double layers, while the attractive forces are the van der Waals forces, the range of which is larger than the film thickness. At short distances, strong repulsive hydration forces appear which decay exponentially with distance. The general dispersion equation displays two vibrational modes (bending and squeezing); the stability conditions of these are derived. A possible mechanism for the kinetics of vesicle aggregation and fusion is suggested. © 1984. |
