Synthesis and physicochemical characterization of silica fillers modified with octakis({3-methacryloxypropyl}dimethylsiloxy) octasilsesquioxane

Authors:

• Karolina Szwarc-Rzepka,
• N. Gogola,
• K. Siwińska-Stefańska,
• Bogdan Marciniec,
• T. Jesionowski

Abstract

Hybrid nanofillers of silica grafted with octakis({3-methacryloxypropyl} dimethylsiloxy) octasilsesquioxane were obtained by the method based on solvent evaporation with the use of both hydrated or emulsion spherical silica. Octakis({3-methacryloxypropyl}dimethylsiloxy) octasilsesquioxane was applied as a modifying agent and it was synthesized by employing the hydrosilylation reaction. The effectiveness of modification of the hybrid nanofillers obtained was verified using Fourier transform infrared spectroscopy and nuclear magnetic resonance (29Si and 13C CP MAS NMR). The products obtained were characterized by determination of their physicochemical properties and porous structure, including specific surface area, pore diameter and pore volume. Dispersion degree and particle size of the nanofillers was characterized by NIBS (Non-Invasive Back-scatter) method and laser diffraction technique, while their morphology by transmission electron microscopy.