中文摘要：

以正硅酸乙酯和钛酸四丁酯为前驱体，乙烯基三乙氧基硅烷为偶联剂，采用溶胶凝胶原位聚合法制备了聚甲基丙烯酸甲酯／二氧化硅-二氧化钛（PMMA/SiO2-TiO2）杂化溶胶，陈化后用提拉法制得杂化纤维。研究了溶胶的杂化反应机理；使用红外光谱（IR）、扫描电子显微镜（SEM）、紫外。可见光谱（UV—Vis）、荧光光谱（FL）和热重分析（TGA）分析了杂化纤维的结构与性能。结果表明，PMMA与SiO2-TiO2之间通过化学键连接；纤维直径为150μm，在纤维内部有机无机相间形成均一的连续相；TiO2的引入增加了其抗紫外性；杂化纤维具有荧光性能；其耐热性能优于纯PMMA。

英文摘要：

By sol-gel in-situ polymerization method, poly （methyl methaerylate）/silica-titania （PMMA/SiO2- TiO2） hybrid sol was prepared with tetraethoxylsilane and tetrabutyl titanate as precursor, vinyltrithorysilane as coupling agent. After being aged, PMMA/SiO2-TiO2 hybrid fibers were prepared by drawing from the hybrid sol. The hybrid mechanism of the sol was studied; structure, micro-morphology and property of the fiber were studied by Fourier transform infrared （FT-IR）, scanning electron microscopy （SEM）, ultraviolet visible spectrometry （UV- Vis）, fluorescence spectrophotometer （FL） and thermo-gravimetric analysis（TGA）. The results show that PMMA is linked with SiO2-TiO2 network by chemical bonds, the diameter of the fiber is 150μm, in the interior of the fiber, a homogeneous and continuous phase is formed by organic and inorganic components; its ultraviolet （UV） shielding properties are greatly improved with titania filled in the hybrid fibers; it possesses the property of fluorescence; it shows better resistance to heat than pure PMMA.