Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 36, Pages 13801-13810Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm11752a
Keywords
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Funding
- Grant Agency of the Academy of Sciences of the Czech Republic [IAA 400500701]
- Academy of Sciences [M200500903]
- National Council of Scientific and Technological Development (CNPq) of the Brazilian government
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This work addresses the use of ionic liquids (ILs) as additives for formation of epoxy-silica nanocomposites, via the simultaneous sol-gel process and epoxy network build-up. The application of different methylimidazolium based ILs allows controlling the silica structure and modifying interphase interaction, thus producing hybrids with diverse morphologies and improved mechanical properties. Both the anionic and cationic components of the ILs affected the hybrid formation and the final properties. The application of 1-decyl-3-methylimidazolium tetrafluoroborate ionic liquid together with HCl as an acid catalyst promotes both hydrolysis and condensation in the sol-gel process as well as the self-assembly ordering of the IL. This system produces a very fine hybrid morphology with well dispersed silica nanodomains and a significantly increased rubbery modulus due to physical crosslinking by the ordered domains of decyl-substituents.
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