常温常压下有机-无机杂化对SiO2光学薄膜微观结构的调控机理

项目名称： 常温常压下有机-无机杂化对SiO2光学薄膜微观结构的调控机理

项目编号： No.61505029

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 张欣向

作者单位： 福建农林大学

项目金额： 20万元

中文摘要： 本项目研究常温常压条件下有机-无机杂化对SiO2光学薄膜微观结构的调控机理，为实现SiO2光学薄膜折射率的连续可控和超低折射率化提供理论依据。有机-无机杂化的途径为有机改性单体与正硅酸乙酯共聚、SiO2粒子表面强疏水修饰以及两者相结合。系统研究有机-无机杂化对SiO2溶胶和薄膜性质的影响，建立溶胶和薄膜的微观结构与宏观性能之间的关系，阐明有机-无机杂化对SiO2光学薄膜微观结构的调控机理。在此基础上，筛选有机改性单体和优化工艺条件，制备折射率在1.0-1.20之间连续可控的超低折射率SiO2薄膜。本项目的研究弥补了常规溶胶-凝胶法无法实现折射率在1.0-1.20之间连续可控的SiO2薄膜的缺憾，同时也为简单条件下制备具有超低折射率（或超高孔隙率）的薄膜、片材和块材（如气凝胶）等提供实验借鉴。

中文关键词： 光学薄膜；有机-无机杂化；溶胶-凝胶法；调控机理；折射率

英文摘要： The regulation mechanism of organic-inorganic on the microstructure of silica optical thin films at ambient temperature and pressure was investigated. This provides theoretical basis for preparation of silica thin films with controlled and ultra-low refractive indices. The organic-inorganic hybrid methods include the co-condensation of TEOS with organically modified monomer, surface hydrophobic modification of silica particles and the combination of them. After systematically characterization of the properties of silica sols and thin films, the relationship between the microstructures and properties of silica sols and thin films was investigated, and the regulation mechanism of organic-inorganic on the microstructure of silica thin films was explained. Finally, silica thin films with controlled refractive indices between 1.0 and 1.20 were prepared after optimization of organically modified monomer and process condition. The investigation of this project fills the void of preparation of silica thin film with refractive indices between 1.0 and 1.20 by normal sol-gel process. In addition, it also provides useful reference for preparation of thin films, sheet and bulky materials with ultra-low refractive index or ultra-high porosity.

英文关键词： optical thin film;organic-inorganic hybrid;sol-gel method;regulation mechanism;refractive index