氧化钛/氧化石墨纳米复合材料的制备、表征及性能

Titania/graphite oxide (TiO2 /GO) nanocomposites were obtained from a facile in-situ method using titanium tetrachloride (TiCl4) and GO.Nanocomposite structures and properties were characterized by Fourier transform infrared (FTIR) spectroscopy,X-ray diffraction (XRD),thermogravimetric-differential thermal analysis (TG-DTA),X-ray photoelectron spectroscopy (XPS),transmission electron microscopy (TEM),scanning electron microscopy (SEM),and UV-Vis absorption spectroscopy.TiO2 /GO nanocomposites could be well dispersed in water,and the addition of waterborne polyurethane (WPU) yielded TiO2 /GO-WPU coatings.During oxidation,the graphite structural layer bound with numerous functional groups,some of which were chemically bound TiO2.The GO peak disappeared after combining with TiO2 nanoparticles.UV absorption data indicated an increasing percentage of WPU with increasing GO content.There was an optimal additive concentration at which the best absorbance results were achieved.The thermal stability and UV and wear resistance of the WPU were greatly improved upon the addition of TiO2 /GO.