关键词: 溶胶凝胶;超亲水;耐污;易清洁涂层

Abstract: By combining with high purity silica sol , a super-hydrophilic coating solution with different particle size was prepared by sol-gel process .The super-hydrophilic coating was prepared on the glass substrate by the dip coating process . The effects of the coating thickness were analyzed . The microstructures and thickness of the coating and the mechanism of easy cleaning were analyzed by SEM . The thickness , pore size distribution , porosity and refractive index of the coating were tested by ellipsometer.The coating was tested by outdoor dust test .The results show that , the coating has the micro-nano porous structure , and the thickness is between 150-275 nm, the porosity is 3％-5％, and the pore size is less than 2 nm.By controlling the sol composition and preparation process parameters , the prepared coating has a super-hydrophilic ,anti-soiling and easy cleaning performance .

Key words: sol-gel;super-hydrophilic;anti-soiling;easy cleaningcoating