Organosilane-modified maghemite nanoparticles and their use as co-initiator in the ring-opening polymerization of epsilon-caprolactone.

Christophe Flesch (1) , M. Joubert (1) , Elodie Bourgeat-Lami (2) , Stéphane Mornet (3) , Etienne Duguet (3) , Christelle Delaite (1) , Philippe Dumas (1)

1 ICSI - Institut de Chimie et des Surfaces et Interfaces
2 LCPP - Laboratoire de chimie et procédés de polymérisation
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Hydroxyl and amino groups were introduced on maghemite nanoparticles surface by grafting of (3-glycidoxypropyl)trimethoxysilane and N-(2-aminoethyl)-3-aminopropyltrimethoxy silane, in several solvents including water, toluene and N,N-dimethylformamide. Coating of maghemite particles by a biocompatible and biodegradable polyester, namely the poly(epsilon-caprolactone) was then achieved, by an aluminum isopropoxide-catalyzed ring-opening polymerization of var epsilon-caprolactone initiated ‘from' the maghemite particles surface. Silane and polymer coating were characterized by TGA and DRIFT spectroscopy. In this manner, nanocomposites containing up to 0.43 g of polymer per gram of maghemite were obtained.

Mots clés: (3-Glycidoxypropyl)trimethoxysilane; Silylation; Poly(var epsilon-caprolactone); Nanocomposite; N-(2-aminoethyl)-3-Aminopropyltrimethoxysilane; Maghemite

Domaines: Matériaux

Christophe Flesch, M. Joubert, Elodie Bourgeat-Lami, Stéphane Mornet, Etienne Duguet, et al.. Organosilane-modified maghemite nanoparticles and their use as co-initiator in the ring-opening polymerization of epsilon-caprolactone.. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2005, 262 (1-3), pp.150-157. ⟨10.1016/j.colsurfa.2005.04.039⟩. ⟨hal-00124143⟩