Inorganic nanoparticles dispersed into methacrilates: novel magnetic nanocomposites and hybrid binders for UV-absorbing coatings.

A. Fornara, A. Ahniyaz, A. Larsson, M. Muhammed, M. Sjöberg
YKI - Institute for Surface Chemistry, SE

Keywords: nanocomposites, magnetic nanoparticles, ceria, UV-absorbing, coatings

Summary:

The use of inorganic nanoparticles into polymer matrix can provide high-performance novel materials that find applications in many industrial fields. Still there is a need to improve the nanoparticles dispersion in different polymeric matrixes in order to achieve superior performances and open a wide range of industrial applications.In this work, we developed homogeneous bulk iron-oxide/PMMA nanocomposites that possess unique magnetic properties based on the size of nanoparticles. High transparency and homogeneous dispersion of magnetic nanoparticles in bulk samples were obtained thanks to the surface modification of magnetite nanoparticles prepared by thermal decomposition methods. Cerium oxide nanoparticles with specific size (6nm) and UV-absorbing properties were also developed and surface functionalized in order to incorporate them into methacrilate-based binder particles via an emulsion polymerization process. The hybrid nanocomposite binders were formulated in lacquers for clear coating applications for wood protection and field tests show exciting results.