A solvothermal process was developed to in situ prepare epoxy (EP)/TiO 2 hybrid precursors. The chemical structure of samples was confirmed by X-ray and Fourier transformed infrared spectroscopy. Field emission scanning electron microscope micrographs of cured EP/ TiO 2 hybrid composites showed that well-dispersed TiO 2 nanoparticles were successfully in situ formed in epoxy matrix through the solvothermal process. The thermogravimetic analysis, DSC, and gel content measurements showed that EP/TiO 2 hybrid precursors were fully cured with the glass transition temperature decreasing gradually. The effect of TiO 2 contents on optical and surface proper-ties was investigated in detail. The results indicated that epoxy/TiO 2 nanocomposites exhibited excellent UV shielding effect and high visible light transparency. The contact angle of EP/TiO 2 nanocomposites, when the content of silane-coupling agent (KH560) was 5 g and the content of tetrabutyl titanate (TBT) was 3 g, can reach as high as 101 , which was 36 higher than that of pure EP, representing for the increase of hydrophobicity.
Polystyrene (PS)-c-methacryloxypropyl trimethoxy silane (MPTMS) copolymer/zirconia (ZrO 2 ) nanohybrid materials were successfully prepared by the combination of solvothermal and in situ synthesis methods, in which the comonomer was used as chemical bonding agent between the nanoparticles and the matrix, and acetylacetone (AcAc) was used as a size control agent of ZrO 2 in the PS matrix. Then, a new transparency film with a relatively high refractive index (1.72) was successfully obtained, in which ZrO 2 could be dispersed well in the PS-MPTMS matrix. Field emission scanning electron microscopy images indicated that AcAc was helpful in the dispersion of the nanoparticles, and smaller ZrO 2 particles with no aggregation were obtained in the PS-MPTMS matrix. The structure and thermal properties of the hybrid films were investigated by Fourier transform infrared spectroscopy and thermogravimetric analysis, and the surface properties were also examined.
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