纳米TiO_2包硅处理及其性能的研究

Study on surface SiO_2-coated nano- titania and its properties

从紫外线的吸收能力、分散稳定性及酸溶性等方面分析包硅前后产品的性能变化。包膜改性后的TiO2分散性和酸溶性都得到明显改善,ζ电位发生了很大的变化。并且确定,要得到紫外吸收及可见光的透过能力较大的TiO2,包SiO2含量约在5%左右效果最好。

The properties of nano-titania and SiO2-coated nano-titania are compared by usingultraviolet absorption spectrometry (UV) and particle size distribution. All data of UV shieldingcapability, average size and size distribution and ζ-potentials show that the properties of modifiednano-titania have had improvement in dispersion, stability and solubility in acid, etc. Experimentalresults show that UV shielding capability of TiO2 is best under percentage of SiO2/TiO2 being 5%.