Vesicle-to-micelle transition induced by grafted diblock copolymers |
| |
Authors: | A Schalchli-Plaszczynski L Auvray |
| |
Institution: | (1) Laboratoire Léon Brillouin (CEA-CNRS), CEN Saclay, 91191 Gif-sur-Yvette Cedex, France, FR;(2) Université d'Evry Val d'Essonne, 91025 Evry Cedex, France, FR |
| |
Abstract: | We study by small-angle neutron scattering the vesicle-to-micelle transition induced by anchoring diblock copolymers on the
surfactant membranes. Vesicles are made using the ternary system SDS (sodium dodecyl sulfate)/octanol/PS-POE (polystyrene-polyoxyethylene),
chosen as a model of more complex biological systems. The anchored polymer chains destabilize the membranes and lead to the
formation of mixed polymer-surfactant micelles. We show that there is no influence of the polymer mass on the membranes destabilization.
We compare this experimental result with recent theoretical predictions concerning the polymer-grafted membranes. We have
a good agreement with predictions involving membrane curvature effects, and also with predictions focusing on more local deformations
of membranes created by the grafted chains.
Received 12 June 2001 and Received in final form 18 March 2002 |
| |
Keywords: | PACS 87 16 Dg Membranes bilayers and vesicles – 83 80 Uv Block copolymers – 61 12 Ex Neutron scattering techniques (including small-angle scattering) |
本文献已被 SpringerLink 等数据库收录! |