为改良木材表面性质，增加功能性，依据Sol-gel法，同步使木材表面生成SiO2、TiO2凝胶，通过高频作用，形成光洁度好、呈结晶结构的硅钛复合膜，该膜具有光催化、疏水性等性能。研究硅钛前驱体发生溶胶-凝胶反应的条件及其在木材表面成膜的方法，生成SiO2、TiO2粒子大小为400nm以下、厚度为10-30μm。研究高频作用的频率、时间、温度等影响因素，形成光洁度好、呈结晶结构的硅钛复合膜。研究该硅钛复合膜的形貌、化学结构、结合方式、与木材表面结合方式等微观构造及光催化、疏水性等性能。该项目明确了木材表面负载硅钛复合膜的方法与机理，是一种无毒无污染的木材表面改良方法，赋予木材表面光催化、疏水性，能使其表面的有机污染物光催化降解及防水，达到自清洁作用，使木材用得更好、更久。

In order to improving the surface properties of wood, based on sol-gel method, wood surface is loaded with SiO2-TiO2 gel one time. After high frequency treating, the Si-Ti composite film of photocatalysis and hydrophobicity will be produced. In order to produced SiO2 -TiO2 gel of 400nm paricle diameter and 10-30μm thickness on wood surface, the reaction conditions of sol-gel and the method of producing film are studied. The high frequency treating influence factors of frequency, time, temperature are controlled to produce crystal and smooth Si-Ti compsite film. The microstucture of morphology, chemical structure, combination mode.and the properties of photocatalysis, hydrophobicity are studied. The controlling method and mechanism of wood surface loaded with Si-Ti composite film are revealed. It is a method of improving wood surface properties without poisonousness and pollution, and remove the organic pollutants on their surface by photocatalysis degradation. It is a self-cleaning process and make wood be used better and more time.