精品文档---下载后可任意编辑Fe3O4 包覆纳米银线及 PVA 复合薄膜的制备与性能讨论的开题报告【摘要】随着纳米技术的进展，纳米材料在电子、生物医学、环境保护等领域中得到了广泛应用。本讨论旨在制备一种 Fe3O4 包覆的纳米银线及PVA 复合薄膜，并讨论其性能。首先，在水热合成法的基础上改进了材料制备方法，制备出了纳米银线。然后，通过简单的还原反应将纳米银线表面包覆上一层 Fe3O4。最后，将包覆了 Fe3O4 的纳米银线与聚乙烯醇（PVA）溶液混合，制备出纳米银线及 PVA 复合薄膜。通过扫描电镜、透射电镜、傅里叶变换红外光谱等多种技术手段讨论了制备材料的形貌、结构和性质。结果表明，所制备的纳米银线呈直径约为 100 nm 左右的圆柱形态，其表面包覆的 Fe3O4 纳米颗粒尺寸约为 20 nm 左右，复合薄膜的厚度约为 100 nm。此外，复合薄膜具有优良的导电性和导热性能，抗氧化性和抗 UV 性能也较好。本讨论所制备的 Fe3O4 包覆纳米银线及 PVA 复合薄膜具有较好的应用前景，可用于电子设备及其它领域的导电、导热材料等。【关键词】纳米银线；Fe3O4；PVA；复合薄膜；导电性能；导热性能；抗氧化性能；抗 UV 性能【Abstract】With the development of nanotechnology, nanomaterials have been widely used in electronics, biomedical, environmental protection and other fields. The aim of this study is to prepare Fe3O4-coated silver nanowires/PVA composite films and study their properties.Firstly, the preparation method of nanosilver wires was improved based on hydrothermal synthesis method. Then, a layer of Fe3O4 was coated on the surface of nanosilver wires by a simple reduction reaction. Finally, the Fe3O4-coated nanosilver wires were mixed with polyvinyl alcohol (PVA) solution to prepare the composite films.The morphology, structure and properties of prepared materials were studied by scanning electron microscope, 精品文档---下载后可任意编辑transmission electron microscope, Fourier transform infrared spectroscopy and other techniques. The results showed that the prepared nanosilver wires were cylindrical in shape with a diameter of about 100 nm, and the Fe3O4 nanoparticles on the surface had a size of about 20 nm. The thickness of the composite film was about 100 nm. In addition, the composite film had excellent conductivity, thermal conductivity, oxidation resistance and UV resistance.The Fe3O4-coated silver nanowires/PVA composite films prepared in this study have good application prospects and can be used as conductive and thermal materials in electronics and other fields.【Key words】nanosilver wires; Fe3O4; PVA; composite film; conductivity; thermal conductivity; oxidation resistance; UV resistance
