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Tunable reinforcement of epoxy-silica nanocomposites with ionic liquids

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Tunable reinforcement of epoxy-silica nanocomposites with ionic liquids

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Título Tunable reinforcement of epoxy-silica nanocomposites with ionic liquids
Autor Donato, Ricardo Keitel
Donato, Katarzyna Joanna Zawada
Schrekker, Henri Stephan
Matejka, Libor
Abstract Imidazolium ionic liquids (ILs) have the capacity to exert multiple functions as additives for the formation of epoxy-silica nanocomposites, via the simultaneous sol–gel process and epoxy network build-up. This study addresses the effect of ILs on the reinforcement of tensile properties in rubbery epoxy-silica nanocomposites, allowing property tailoring. The use of ILs together with the coupling agent 3-glycidyloxypropyltrimethoxysilane (GTMS) created a synergic action between physical and chemical interfacial bonding, enabling an increase in toughness without a considerable loss of stiffness. The best tensile property balance was obtained with IL 1-triethylene glycol monomethyl ether-3- methylimidazolium methanesulfonate and GTMS. The rubbery nanocomposite produced was remarkably both stiffer and tougher than the unmodified epoxy-silica system, displaying ca. 6 times higher modulus and tensile strength as well as more than 10 times higher energy to break.
Contido em Journal of Materials Chemistry. Cambrigde, GB. Vol. 22, no. 19, (2012), p. 9939-9948
Assunto Líquidos iônicos
Nanocompósitos
Silica
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/85393
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