超亲水TiO_2和TiO_2-SiO_2表面的动态润湿性  

Dynamic Wettability of Superhydrophilic TiO_2 and TiO_2 SiO_2 Surfaces

作　　者：冯文辉[1] 管自生[1] 蒋峰芝[1] 张金彪[1] 宋延林[1] 江雷[1] 

机构地区：[1]中国科学院化学研究所,北京100080

出　　处：《高等学校化学学报》2003年第4期745-747,共3页Chemical Journal of Chinese Universities

基　　金："九七三"国家重大基础研究项目 (批准号 :19990 64 4 5 0 4)资助

摘　　要：The dynamic wetting of water spreading on TiO 2 and TiO 2 SiO 2 films prepared by sol gel method and subsequently treated by air plasma and UV irradiation was investigated. Water completely spread on TiO 2 surface within 3 s and its dynamic contact angles can be expressed by a power law θ d= k(t+a) -n with the n value 0.98. Less than 50%(molar fraction) SiO 2 addition can accelerate the dynamic water spreading rate on the TiO 2 SiO 2 films and the optimum molar fraction of SiO 2 amount corresponding to as annealed, air plasma, and UV irradiation treatment process is 15%, 10% and 20%, respectively.The dynamic wetting of water spreading on TiO 2 and TiO 2 SiO 2 films prepared by sol gel method and subsequently treated by air plasma and UV irradiation was investigated. Water completely spread on TiO 2 surface within 3 s and its dynamic contact angles can be expressed by a power law θ d= k(t+a) -n with the n value 0.98. Less than 50%(molar fraction) SiO 2 addition can accelerate the dynamic water spreading rate on the TiO 2 SiO 2 films and the optimum molar fraction of SiO 2 amount corresponding to as annealed, air plasma, and UV irradiation treatment process is 15%, 10% and 20%, respectively.

关 键 词：TIO2 SIO2 动态润湿性 超亲水表面 二氧化钛 二氧化硅 

分 类 号：O647.11[理学—物理化学]