Preparation and Characterization of Functionalized SiO2 Nanoparticles with Crosslinking Structure

摘要

In this study, we have grafted polyurethane onto the surface of silica (SiO2) nanoparticles dispersed in the organic solvent via crosslinking reaction, synthesizing a new functionalized SiO2 nanoparticles successfully. The resultant SiO2 nanoparticles sample was characterized by FT-IR, TG and SEM, demonstrating that the polyurethane chains has grafted onto the surface of SiO2 nanoparticles and have given rise to a crosslinking structure between SiO2 nanoparticles and polyurethane. After surface modification, SiO2 nanoparticles was dispersed evenly in the organic solvent.