Core–shell structured poly(methyl methacrylate)-coated zirconium dioxide nanoparticle and its dispersion stability

To improve dispersion stability of ZrO2 nanoparticles dispersed in a poly(4-vinylphenol-co-methyl methacrylate) (PVP-co-PMMA)/2-methoxyethanol solution, they were coated with poly(methyl methacrylate) (PMMA) by dispersion polymerization. Cross-linked PMMA-coated ZrO2 particles were characterized by SEM and TEM. Chemical composition was examined by FT-IR spectroscopy. Mass ratio of PMMA to the ZrO2 was analyzed by TGA. Density (1.97 g/cm3) of the PMMA coated ZrO2 particles was much lowered compared to 5.46 g/cm3 of ZrO2, and the improved dispersion stability of the coated particles in the PVP-co-PMMA/2-methoxyethanol solution was demonstrated using a Turbiscan.

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