title: Polysaccharide-covered nanoparticles with improved shell stability using click-chemistry strategies.
abstract: Dextran-covered PLA nanoparticles have been formulated by two strategies. On one hand, dextran-g-PLA copolymers have been synthesized by click-chemistry between azide-multifunctionalized dextran (DexN3) and alkyne end-functionalized PLA chains (α-alkyne PLA); then nanoprecipitated without any additional surfactants. On the other hand, DexN3 exhibiting surfactant properties have been emulsified with unfunctionalized or α-alkyne PLA, which are dissolved in organic phase with or without CuBr. Depending on the o/w emulsion/evaporation process experimental conditions, dextran-g-PLA copolymers have been produced in situ, by click chemistry at the liquid/liquid interface during the emulsification step. Whatever the process, biodegradable core/shell polymeric nanoparticles have been obtained, then characterized. Colloidal stability of these nanoparticles in the presence of NaCl or SDS has been studied. While the physically adsorbed polysaccharide based shell has been displaced by SDS, the covalently-linked polysaccharide based shell ensures a permanent stability, even in the presence of SDS.
authors.affiliation: Université de Lorraine, Laboratoire de Chimie Physique Macromoléculaire LCPM, UMR 7568, Nancy F-54000, France.
authors.forename: Maxime
authors.initials: M
authors.lastname: Laville
authors.forename: Jérôme
authors.initials: J
authors.lastname: Babin
authors.forename: Isabel
authors.initials: I
authors.lastname: Londono
authors.forename: Mélanie
authors.initials: M
authors.lastname: Legros
authors.forename: Cécile
authors.initials: C
authors.lastname: Nouvel
authors.forename: Alain
authors.initials: A
authors.lastname: Durand
authors.forename: Régis
authors.initials: R
authors.lastname: Vanderesse
authors.forename: Michèle
authors.initials: M
authors.lastname: Leonard
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Six