Reference : Organomodification of montmorillonite in supercritical carbon dioxide
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/91531
Organomodification of montmorillonite in supercritical carbon dioxide
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 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) > >]
Alexandre, Michaël mailto [University of Liège (ULg) > Department of Chemistry > Center for Education and Research on Macromolecules (CERM) > >]
Mar-2011
Applied Clay Science
Elsevier Science
51
4
467-772
Yes (verified by ORBi)
International
0169-1317
Amsterdam
The Netherlands
[en] supercritical carbon dioxide ; clay
[en] The use of organo-montmorillonite as nanofiller for the preparation of polymer nanocomposites still attracts a lot of attention both on experimental and industrial scale. In order to enlarge the range of organo-montmorillonites available for this application, supercritical carbon dioxide (scCO2) was used as a medium for the organomodification process. This environmentally friendly solvent showed a great potential to obtain ready-to-use organo-montmorillonite powders. Intercalation with high degrees of exchange was obtained when the surfactants (alkyl ammonium, phosphonium, and imidazolium salts) were in the liquid state at the reaction temperature. The addition of a small quantity of co-solvent enabled the intercalation of solid surfactants, such as those bearing hydroxyl or carboxyl groups. Basal spacings of montmorillonite modified in scCO2 corresponded to those measured for organo-montmorillonite prepared in the wet process. A detailed investigation of the reaction conditions was finally performed in order to up-scale the process.
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 project
Researchers
http://hdl.handle.net/2268/91531
10.1016/j.clay.2011.01.010
http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6V8Y-51YYNTV-7-F&_cdi=5883&_user=532038&_pii=S0169131711000159&_origin=browse&_zone=rslt_list_item&_coverDate=03%2F31%2F2011&_sk=999489995&wchp=dGLzVtb-zSkzV&md5=367beb7b99658773eb8c2cc47167961b&ie=/sdarticle.pdf
The authors acknowledge Thin Solid Films (Applied Clay Science) for allowing them to archive this paper.

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