高含量高透明度PS/TiO_2纳米复合材料膜的紫外防护性能研究  

UV-protective Properties of Transparent Polystyrene/TiO_2 Nanocomposite Films with High Particle Loadings

作　　者：尉乔南[1,2] 李若平[1] 朱治广[1] 聂慧丽[1] 黄明举[1] 

机构地区：[1]河南大学物理与电子学院,河南开封475000 [2]南阳理工学院电子与电气工程学院,河南南阳473200

出　　处：《中国塑料》2015年第3期63-69,共7页China Plastics

基　　金：国家自然科学基金资助项目(61177004)

摘　　要：采用溶剂热法非水合成了粒径小于20nm的二氧化钛(TiO_2)纳米粒子,并用硅烷偶联剂(KH-570)对纳米粒子进行原位修饰以提高粒子在聚苯乙烯(PS)的对二甲苯溶液中的分散性。采用旋涂法制备不同纳米TiO_粒子含量的PS复合材料膜,用紫外-可见光光谱仪检测了薄膜的紫外防护性能。结果表明,纳米TiO_2的最高含量达到95%(质量分数,下同);随着纳米TiO_2粒子含量的增加,薄膜的紫外屏蔽性能逐渐增强,同时可见光区的透明度不会线性减少,而是趋于饱和,当纳米TiO_2粒子含量达到95%时,在人眼最敏感的550 nm波长处,依然可以获得82%的透明度。The anatase TiO_2 nanoparticles with diameter of smaller than 20 nm were prepared in a nonaqueous sol-gel approach,which was modified with 3-(trimethoxysilyl)propyl methacrylate and dispersed in a PS solution in para-xylene.TiO_2 containing solution was spin-coated to a film,in which the TiO_2 contents was up to 95 wt%.UV-protective properties were examined by a UV-Vis spectrometer.The experiments indicated that the UV-protective property was enhanced with increasing TiO_2 content.The transmittance of visible light became saturated,rather than linearly decreased.When the particle content was 95 wt%,the transmissivity was still higher than 82%.

关 键 词：聚苯乙烯 纳米二氧化钛 高含量 高透明度 紫外防护 

分 类 号：TB33[一般工业技术—材料科学与工程]