Transparent and flexible thin films of ZnO-polystyrene nanocomposite for UV-shielding applications

被引:175
作者
Tu, Yao [1 ]
Zhou, Li [2 ]
Jin, Yi Zheng [1 ]
Gao, Chao [2 ]
Ye, Zhi Zhen [1 ]
Yang, Ye Feng [1 ]
Wang, Qing Ling [1 ]
机构
[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Key Lab Macromol Synth & Functionalizat, Minist Educ, Dept Polymer Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
INDUCED DNA-DAMAGE; OPTICAL-PROPERTIES; QUANTUM DOTS; DOPED CERIA; NANOPARTICLES; COMPOSITES; REPAIR; PMMA;
D O I
10.1039/b914156a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A solution casting approach was developed to obtain flexible and self-supporting ZnO-polystyrene (PS) nanocomposite thin films (ca. 360 mu m) which were highly transparent in the visible region and exhibited excellent UV-absorbing properties. The nanocomposite films were prepared from homogeneous solutions of ligand-modified ZnO nanocrystals and PS. UV-Vis spectra, transmission electron microscopy (TEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and photoluminescence (PL) characterization techniques were employed to study optical and structural properties, as well as thermal stabilities of the nanocomposite films. Results revealed the high UV-shielding efficiency of the composites: for a film containing 1.0 wt. % of ZnO nanocrystals, over 99% of UV light at wavelengths between 200 and 360 nm was absorbed while the optical transparency in the visible region was slightly below that of a neat PS film. Minute amounts of organic ligands minimized aggregation of the ZnO nanocrystals, leading to the homogeneous blend solutions and eventually the well dispersed ZnO-PS nanocomposite films with stable optical properties. The present work is of interest for developing transparent UV-shielding materials and should help in the understanding and design of inorganic-polymer nanocomposites with desired properties.
引用
收藏
页码:1594 / 1599
页数:6
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