纳米TiO_2的紫外光学特性及在粉末涂料抗老化改性中的应用  

Study on Optical Properties and Application in Powder Coating Ultraviolet Ray Resistance of Nano-TiO_2

作　　者：郭刚[1] 汪斌华[1] 黄婉霞[1] 于杰 曹建军[3] 涂铭旌[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610065 [2]贵州省材料技术创新基地,贵州贵阳550003 [3]攀枝花钢铁研究院,四川攀枝花617000

出　　处：《四川大学学报（工程科学版）》2004年第5期53-56,61,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家863计划资助项目(2003AA32X230)

摘　　要：研究比较了金红石型纳米TiO2、锐钛矿型纳米TiO2和体相金红石型TiO23种材料的紫外-可见光学特性,结果表明金红石型纳米TiO2具有比锐钛矿型纳米TiO2和体相金红石型TiO2更加优异的紫外线屏蔽性能,并对其屏蔽机理进行了分析;分别制备了金红石型纳米TiO2含量为2%和5%的改性聚酯-TGIC粉末涂料,通过人工紫外加速老化发现:相比未改性配方,改性粉末涂料的抗紫外光老化性能得到大幅提高,改性粉末涂料(2%金红石型纳米TiO2)经过192h加速老化后,色差值小于1.52,光泽度保持率在50%以上,比未改性配方提高4倍以上。Water-suspend absorption UV-Vis spectrum of nano-rutile-TiO2, nano-anatase-TiO2 and bulk phase rutile-TiO2 was studied. The results show that the nano-rutile-TiO2 has the best performance of absorption at the same thickness, and the UV-shield mechanism of these materials was discussed. The nano-rutile-TiO2 (2% and 5%) modified polyester-TGIC powder coatings were prepared. The ultraviolet ray resistance of the modified powder coating was improved considerably. The aberration of powder coatings modified by nano-rutile-TiO2 (2%) is less than 1.52 and the gloss percent retension which was improved four times is more than 50% after 192 hours exposure to mercury-vapor lamp.

关 键 词：纳米TIO2 紫外线 光学特性 粉末涂料 抗紫外光老化 

分 类 号：TQ630.1[化学工程—精细化工]