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Prepolymerized organic–inorganic hybrid nanoparticles as fillers for light-cured methacrylate monomers

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Abstract

Poly(hydroxyethyl methacrylate)/silica (PHEMA/SiO2) hybrid organic–inorganic nanocomposites were prepared through the simultaneous polymerization of 2-hydroxyethyl methacrylate and tetraethoxysilane. PHEMA/SiO2 materials were obtained as monolithic and transparent films consisting of silica nanoparticles (diameter below 100 nm) surrounded by the PHEMA matrix. The films were crushed into fine powder and the PHEMA/SiO2 particles were used as filler of methacrylate monomers. The polymeric methacrylate present in the PHEMA/SiO2 hybrid particles improves the compatibility of the filler with the methacrylate monomer to be photopolymerized, resulting in enhanced wetting capabilities. The composites prepared from PHEMA/SiO2-prepolymerized particles offer the possibility of reduced polymerization shrinkage without severe reductions in flow characteristics of the precured polymers. The monomer conversions of composites prepared with either 30 or 60 wt% PHEMA/SiO2 particles were similar. This indicates that the penetration of visible radiation into the sample is not reduced significantly by the presence of the filler.

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Acknowledgements

The financial support provided by the ANPCyT is gratefully acknowledged. The authors are grateful to Esstech for the generous donation of the bis-GMA monomer.

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Authors and Affiliations

  1. Institute of Materials Science and Technology (INTEMA), Universidad Nacional de Mar del Plata-National Research Council (CONICET), Av. Juan B. Justo 4302, 7600, Mar del Plata, Argentina

    Verónica L. Mucci, Gustavo F. Arenas, Claudio J. Pérez & Claudia I. Vallo

Authors
  1. Verónica L. Mucci
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  2. Gustavo F. Arenas
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  3. Claudio J. Pérez
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  4. Claudia I. Vallo
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Corresponding author

Correspondence to Claudia I. Vallo.

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Mucci, V.L., Arenas, G.F., Pérez, C.J. et al. Prepolymerized organic–inorganic hybrid nanoparticles as fillers for light-cured methacrylate monomers. J Mater Sci 47, 2951–2959 (2012). https://doi.org/10.1007/s10853-011-6128-x

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  • DOI: https://doi.org/10.1007/s10853-011-6128-x

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