【摘要】 采用等离子镀膜方法在纳米ZnO颗粒表面沉积一层有机薄膜,制备出聚合物/ZnO复合材料。用高分辨透射电子显微镜(HRTEM)、傅立叶变换红外光谱(FTIR)、光致发光光谱(PL)和紫外-可见吸收光谱(UV-Vis)对其形貌、结构和性能进行表征,研究了聚合物/ZnO复合材料的光学性能以及聚合物与纳米ZnO颗粒的结合强度。结果表明,用等离子镀膜法可在纳米ZnO颗粒表面沉积一层醋酸乙烯酯(VAC)聚合物薄膜,薄膜与无机纳米ZnO颗粒以共价键形式结合,结合牢固。这层聚合物薄膜改变了纳米ZnO的表面性能,导致聚合物/ZnO复合材料的紫外-可见吸收能力增强而光致发光性能降低。更多还原

【Abstract】 Surface modification of ZnO nanoparticle with polyvinyl acetate was conducted through-plasma polymerization process.The surface morphology and structure of the functionalized ZnO nanoparticles were investigated.The influence of surface modification on optical properties was examined.The results indicated that a uniform layer with a thickness of 3-7 nm formed on the surface of the ZnO nanoparticles.The thin layer on the surface of the ZnO nanoparticles was found to be polyvinyl acetate (PVAC).Moreover,ageing test for two years indicated that the adhesion behavior between the organic VAC and the inorganic ZnO nanoparticles was good.In marked contrast to the uncoated ZnO nanoparticles, the surface modification resulted in significant decrease of PL intensity.UV/Vis spectra revealed that the PVAC-functionalized ZnO nanoparticles show strong absorption of UV light at wavelengths between 200 and 800 nm while the optical transparency in the visible region was slightly below that of the untreated ZnO nanoparticles更多还原