par Gallez, Dominique 
;Bisch, Paulo Mascarello ;Sanfeld, Albert
Référence Journal of colloid and interface science, 71, 3, page (513-521)
Publication Publié, 1979-10
;Bisch, Paulo Mascarello ;Sanfeld, Albert Référence Journal of colloid and interface science, 71, 3, page (513-521)
Publication Publié, 1979-10
Article révisé par les pairs
| Résumé : | A linear hydrodynamic stability analysis is performed for a dipole layer at a fluid-fluid interface as was done in Part I for an ion layer. The discrete electrical interactions between the dipoles and their "dielectric images" introduces also a negative contribution to the surface tension, but weaker than that for an ion layer. A destabilizing coupling term appears between longitudinal and normal modes of displacement, due to the image dipoles. Nevertheless, the system can be stabilized by the bulk viscosities if the dipoles are supposed to bathe in the aqueous solution. These two destabilizing effects strongly depend on the reorientation of the dipoles when the interface is deformed. External factors, of mechanical or electrical origin, which force the dipoles to remain parallel to each other, may be considered constraints of the system. This analysis allows us to give some interesting predictions on the stability of polar lipid monolayers at air/water or oil/water interfaces, and of mixed monolayers of polar and charged lipids. © 1979. |
