Ionic PMMA/nanosilica interfaces from grafting ionic liquids under supercritical CO2 conditions

Abstract : Supercritical carbon dioxide (scCO2) was considered as an environmental friendly medium for grafting the surface of silica nanoparticles with a series of reactive imidazolium-based ionic liquids (IL), denoted as IL-silanes. The effects of the reaction conditions on the resulting IL-grafted layers on the silica surface were characterized from thermogravimetric (TGA) and transmission electronic microscopy (TEM) analyses. The IL-grafted nanoparticles were introduced into poly(methyl methacrylate) (PMMA) via melt mixing in order to design nanocomposites and to demonstrate the ability of IL-grafted nanoparticles to be dispersed into a polymer medium. The role of the IL-grafted surfaces on the morphology of PMMA-based nanocomposites was evidenced by TEM and small angle neutron scattering (SANS). It was demonstrated that longer the alkyl chain length of the IL-silane, better the state of dispersion of nanoparticles within PMMA. In addition, better thermal stabilities and mechanical performances, as well as new surface properties were observed for the designed PMMA-based nanocomposites.
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Submitted on : Thursday, February 7, 2019 - 3:12:07 PM
Last modification on : Thursday, March 14, 2019 - 11:48:57 PM

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Clarice Fedosse Zornio, Sébastien Livi, Jacques Jestin, Jannick Duchet, Jean-François Gérard. Ionic PMMA/nanosilica interfaces from grafting ionic liquids under supercritical CO2 conditions. European Polymer Journal, Elsevier, 2018, 109, pp.82-92. ⟨10.1016/j.eurpolymj.2018.08.050⟩. ⟨hal-02010882⟩

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