[en] A series of novel fluorinated amphiphilic stabilizers of different architecture (diblock, grafted, or palm tree copolymers) were successfully prepared by reversible addition-fragmentation chain transfer and used as stabilizers for the dispersion polymerization of 2-hydroxyethyl methacrylate (HEMA) in fluorinated solvent, namely alpha,alpha,alpha-trifluorotoluene (TFT). The effect of the amount and the architecture of the copolymer on the size and the stabilization of the particles was studied. Whatever the experimental conditions, scanning electron microscopy showed the formation of submicronic (typically about 300 nm) spherical particles, with a narrow size distribution. The principal difference emerges from the concentration of surfactant. Indeed, at higher copolymer concentration, smaller and less aggregated particles were produced. These results were confirmed by dynamic light scattering but these measurements also revealed the presence of larger aggregates (1,5 micrometer). Furthermore, the surfactant properties of the copolymers were investigated by measuring the interfacial tension at the H2O/TFT interface, and the results were correlated to their stabilizing efficiency in the dispersion polymerization of HEMA.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Alaimo, David ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Rieger, Jutta; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Beigbeder, Alexandre; University of Mons-Hainaut (UMons) > Laboratory of Polymeric and Composite Materials (SMPC)
Dubois, Philippe; University of Mons-Hainaut (UMons) > Laboratory of Polymeric and Composite Materials (SMPC)
Broze, Guy ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Christine ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Grignard, Bruno; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
New fluorinated surfactants for nanogels preparation
Publication date :
18 June 2009
Event name :
13th International Conference and Surface and Colloid Science (ICSCS) and 83rd ACS Colloid and Surface Science Symposium
Event organizer :
Ian Morrison Filip Strubbe
Event place :
New York, United States
Event date :
14/06/2009 - 19/06/2009
Audience :
International
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Commentary :
This oral communication was presented by David Alaimo