Reference : Supercritical CO2 as an efficient medium for layered silicate organomodification: pre...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/14591
Supercritical CO2 as an efficient medium for layered silicate organomodification: preparation of thermally stable organoclays and dispersion in polyamide 6
English
Naveau, Elodie [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Calberg, Cédric mailto [University of Liège (ULg) > Department of Applied Chemistry > Laboratory of Industrial Chemistry > >]
Detrembleur, Christophe mailto [University of Liège (ULg) > Department of Chemsitry > Center for Education and Research on Macromolecules (CERM) > >]
Bourbigot, S. [Villeneuve d'Asq, France > > Procédés d’Elaboration de Revêtements Fonctionnels, UMR/CNRS 8008 > >]
Jérôme, Christine mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Alexandre, Michaël mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
6-Mar-2009
Polymer
Elsevier Science
50
6
1438-1446
Yes (verified by ORBi)
International
0032-3861
Oxford
United Kingdom
[en] nanostructured material ; nanocomposite ; clay ; green technology ; supercritical carbon dioxide ; flame retardancy
[en] In this study, the preparation of organoclays via a new process using supercritical carbon dioxide is described. This method turns out to be very efficient with various surfactants, in particular nonwater-soluble alkylphosphonium salts. The influence of the surfactant as well as of the clay nature on the thermal stability of the organoclay is evaluated by thermogravimetric analysis. Phosphonium-based montmorillonites are up to 90 °C more stable than ammonium-based montmorillonites. Moreover, the use of hectorite adds another 40 °C of thermal stability to the phosphonium-modified clays. These organomodified clays have been melt-blended with polyamide 6 and morphology as well as fire properties of the nanocomposites are discussed, in terms of influence of the stability of organoclays. For the first time, comparison of nanocomposites based on clay organomodified by ammonium and phosphonium salts of the very same structure is reported.
Center for Education and Research on Macromolecules (CERM)
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; The "Région Wallonne" in the frame of the "FINECLAY" program
Researchers
http://hdl.handle.net/2268/14591
10.1016/j.polymer.2009.01.040
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TXW-4VFK7YH-6-W&_cdi=5601&_user=532038&_orig=browse&_coverDate=03%2F06%2F2009&_sk=999499993&view=c&wchp=dGLzVzz-zSkzS&md5=4f19c5f0ff217387d9e5e590580716dd&ie=/sdarticle.pdf
http://www.elsevier.com/wps/find/journaldescription.cws_home/30466/description#description
The authors acknowledge Polymer (Elsevier) for allowing them to archive this paper.

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