Preparation of Novel Magnetic Polyurethane Flexible Foam Nanocomposites

摘要

Novel magnetic polyurethane flexible foam nanocomposites were synthesized by incorporation of modified magnetic iron oxide nanoparticles into polyure-thane flexible foam. Core shell magnetic nanoparticles (MNPs) Fe3O4@SiO2 were synthesized via co-precipitation and sol-gel methods and incorporated in the structure of the composites by in-situ polymerization of monomers in the presence of MNPs. The magnetic core-shell NPs were used up to 3.0% in the foam formulation and the optimum percentage was defined. The prepared nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometery (VSM), thermo-mechanical analysis (TMA), and thermogravi-metric analysis (TGA). The thermogravimetric analysis results showed an increased thermal stability of the polyurethane flexible foam nanocomposites by incorporation of magnetic core shell nanoparticles.