Reference : New fluorinated surfactant for nanogels preparation
Scientific congresses and symposiums : Unpublished conference
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/8822
New fluorinated surfactant for nanogels preparation
English
Alaimo, David [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Rieger, Jutta [University of Liège (ULg) > 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 [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Jérôme, Christine mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Grignard, Bruno [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
19-Mar-2009
No
No
National
Journées Rencontres des Jeunes Chimistes 6eme édition
19/03/2009 - 20/03/2009
Comité des Jeunes Chimistes de la Société Royale de Chimie (SRC)
Namur
Belgium
[en] radical polymerization ; reversible addition-fragmentation polymerization (RAFT) ; fluorinated polymer
[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.
Center for Education and Research on Macromolecules (CERM)
Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA
Researchers
http://hdl.handle.net/2268/8822
This oral communication was presented by David Alaimo

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