PET基二氧化钛光催化涂层的制备及性能研究  

Study on Preparation and Properties of TiO_2 Photocatalytic Coatings on PET Substrate

作　　者：朱云峰[1] 杨菁菁[1] 

机构地区：[1]江苏理工学院材料工程学院,江苏常州213001

出　　处：《塑料工业》2017年第3期147-150,156,共5页China Plastics Industry

基　　金：江苏省高校自然科学研究面上项目(14KJB430013)

摘　　要：采用旋涂法在聚对苯二甲酸乙二醇酯(PET)薄膜基材上制备出二氧化钛光催化涂层。为制备纳米二氧化钛(TiO_2)粒子富集于涂层与空气界面处的光催化涂层,采用偶联剂1H,1H,2H,2H-全氟辛基三乙氧基硅烷对纳米TiO_2粒子进行了表面氟化改性。采用SEM、紫外-可见分光光度计和接触角测定仪对PET基光催化涂层的结构进行了表征。结果表明,所制备的光催化涂层厚度约为4~6μm,且在可见光区具有极高的透明性。以甲基橙为目标污染物考察了光催化涂层的光催化活性,结果表明,含有氟化纳米TiO_2粒子的光催化涂层比含有纯纳米TiO_2粒子的光催化涂层具有更高的光催化活性,纳米TiO_2粒子表面氟化改性使纳米TiO_2粒子富集于涂层与空气界面处,这种粒子的分布状态有利于光催化活性的提高。A photoactive coating containing nano-scaled titanium dioxide （TiO2 ） particles was applied on polyethylene terephthalate （PET） substrate by spin-coating method. For the purpose of improving TiO2 dispersion at the air interface coating surface, TiO2 nanoparticles were modified by silane coupling agent 1H, 1H, 2H, 2H-perfluorooctyhriethoxysilane （FTS） with fluoro-organic side chains. The structure of coatings on PET films was characterized by SEM, UV-vis spectroscopy and contact angle measurements. The results showed that the coating layer with a thickness of ~ 4-6μm was highly transparent in visible region. Using methyl orange （MeO） as a target pollutant, the photocatalytic activities of the resulting coatings were investigated. The results indicate that the PET films coated with surface fluorinated particles exhibit higher activities than films with pure particles, which is attributed to the different distribution of TiO2 particles in the two different films.

关 键 词：二氧化钛 表面氟化处理 光催化涂层 聚对苯二甲酸乙二醇酯基材 

分 类 号：TB306[一般工业技术—材料科学与工程]