TiO_2/SiO_2复合薄膜的形成历程与超亲水性关系  

Study on Relationship between Super-Hydrophilicity of TiO_2-SiO_2 Composite Thin Films and Formed Process

作　　者：陈喜明[1] 蒋新[1] 鲁波娜[2] 

机构地区：[1]浙江大学材料与化工学院,杭州310027 [2]中科院过程工程研究所,北京100080

出　　处：《化学反应工程与工艺》2004年第4期352-356,共5页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金(20476088)浙江省科技计划项目(2004C31057)

摘　　要：考察了溶胶-凝胶法制备TiO2／SiO2复合薄膜过程中,正硅酸乙酯(TEOS)的水解时间与膜的超亲水性的关系,通过XRD分析了SiO2添加量对TiO2锐钛矿晶型的影响,并研究复合薄膜的表面处理对其亲水性的影响。实验发现,当无因次反应时间为0.4时,复合薄膜的亲水性最好;SiO2的引入能够抑制金红石晶型的生长,最佳含量在10-20％。TiO2-SiO2 nanocomposite films were prepared via sol-gel processing on the soda lime glass substrates. The effects of SiO2 addition and the relationship between the hydrolysis time of TEOS and super-hydrophilicity of the thin films were investigated. XRD analysis found that the addition of SiO2 had a suppressive effect on the transformation of anatase to rutile in calcinations and the optimum mole fraction of SiO2 was 10-20%. It was also found that the optimum hydrolysis time existed when hydrolysis reaction proceeds 40% of the gelation time. An elementary research on the high temperature treatment which can also lead to super-hydrophilicity was also carried out.

关 键 词：TIO2/SIO2 复合薄膜 膜过程 晶型 超亲水性 反应时间 正硅酸乙酯 TEOS 锐钛矿 溶胶-凝胶法 

分 类 号：TQ245[化学工程—有机化工] O647[理学—物理化学]