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。
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.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第11期141-144,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50373010)
合肥工业大学科学研究发展基金(2009HGXJ0058)
