Responsive Giant Vesicles filled with Poly(N-isopropylacrylamide) Sols or Gels - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Progress in Colloid and Polymer Science Année : 2006

Responsive Giant Vesicles filled with Poly(N-isopropylacrylamide) Sols or Gels

Résumé

We prepared giant unilamellar vesicles (GUVs) enclosing solutions or covalent gels of Poly(Nisopropylacrylamide) (PolyNipam). Concentrated suspensions of GUVs were prepared by applying an alternative field on a lipid film hydrated by a monomer solution containing N-isopropylacrylamide, crosslinker (N,N-methylene-bis-acrylamide), initiator and sucrose. Vesicle inner medium was polymerised and crosslinked by UV irradiation of the suspension, yielding viscous vesicles enclosing a solution of linear PolyNipam chains (when no bisacrylamide was used) or elastic vesicles filled with a covalent PolyNipam gel. We show that gel-filled vesicles are responsive systems triggered by the temperature: they shrink, reducing by a factor eight their volume below the critical temperature (32 ◦C in water, lower in glucose solution) and re-swell in a reversible and reproducible way upon decreasing temperature. In both cases, we show that the vesicle lipid membrane interacts with the internal polymer, resulting in an strong resistance of the vesicles to external mechanical stresses (enhanced tension of lysis).
Fichier principal
Vignette du fichier
proceedings_aachen_re_B20C0.doc.pdf (577.93 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00321709 , version 1 (15-09-2008)

Identifiants

Citer

Magalie Faivre, Clément Campillo, B. Pepin-Donat, Annie Viallat. Responsive Giant Vesicles filled with Poly(N-isopropylacrylamide) Sols or Gels. Progress in Colloid and Polymer Science, 2006, 133, pp.41. ⟨10.1007/2882_050⟩. ⟨hal-00321709⟩
273 Consultations
258 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More