纳米TiO_2和ZnO的抗老化性应用研究

Study on Application of Nano- TiO_2 and ZnO as Anti-ager

利用纳米TiO2和ZnO对聚丙烯材料和建筑外墙涂料进行添加量为0.5%～3%的小量填充改性,结果表明,对聚丙烯改性后,采用GB9344-88所述的塑料氙灯光源曝露试验方法,进行800h人工加速老化试验后色差仅为0.93,变色评级为4/5级,测试样条无粉化;对建筑外墙涂料改性后,涂料的耐候性较原配方提高了2倍,因此,可用无机纳米材料代替传统的有机紫外线吸收剂作为抗老化剂使用。

Nano-TiO2 and ZnO were added with amount of 0.5%～3% into polypropylene and building external wall latex paint. After 800?h exposure to laboratory xenon arc lamp, the aberration of polypropylene specimens modified by nanoTiO2 and ZnO particle is only 0.93. Specimen's color change level was assessed as 4/5, and surface of specimen has no pulverization. In addition,the UV resistance of building external wall coating modified by nanoTiO2 and ZnO particle was improved two times. Therefore, it can be thought about using some inorganic nanoparticles whose function are better, more stable and more lasting to take place of organic ultraviolet absorbents as ageing resistant agent. 