Nanocomposite coatings based on alkyd resin with TiO2 and SiO2 nanoparticles
- Material Science & Engineering International Journal
Anita Grozdanov,1 Gennaro Gentile,2 Maurizio Avella,2 Tatyana Dobreva,3 Rumiana Kotsilkova3
Alkyd resin based nanocomposite coatings filled with different content of silicon oxide (SiO2) and titanium oxide (TiO2) nanoparticles (2 and 4wt/wt%) were prepared by solvent casting method. Characterization of the prepared nanocomposite coatings was performed by Differential Scanning Calorimetry (DSC) and Scanning Electron Microscope (SEM). The nanocomposite coatings were also tested for their Chemical stability, Mechanical properties, Abrasion and Impact resistance. DSC analysis shown that all the characteristic temperatures (glass transition temperature-Tg, reaction temperature-Tr) were shifted to lower values by increasing the nanoparticle content. Mechanical characterization confirmed good elasticity with bending of f=2cm and impact resistance of 1 kg/cm2. Increasing the nanoparticle content, the wear resistance was changed as well. Better abrasion resistance was registered for nanocomposite coatings with SiO2 nanoparticles compared to nanocomposites with the same content of TiO2.
nanocomposite coatings, Alkyd resin, TiO2, SiO2