有机改性先驱体对含铕配合物的凝胶玻璃结构及性能的影响

分别采用γ-缩水甘油氧基三甲氧基硅烷(CH₂OCHCH₂O(CH₂)₃Si(OCH₃)₃) (GPTMS), 甲基三甲氧基硅烷(MTMS)和乙烯基三乙氧基硅烷(VTES)作为有机改性先驱体, 采用原位合成技术, 用溶胶-凝胶法制备了Eu^3＋, β-二酮噻吩甲酰三氟丙酮(TTA)及协同体1,10-菲啰啉(phen)共掺的三种有机改性二氧化硅(ormosil)玻璃. 测量了它们的发射光谱和红外光谱, 并进行了XRD, SEM和TG-DSC测试. 探讨了不同有机改性先驱体及热处理温度对原位合成的稀土有机配合物掺杂二氧化硅凝胶玻璃的发光性能、热稳定性及机械性能的影响. 结果表明, 有机改性先驱体能使凝胶玻璃结构致密, 但同时热稳定性降低; 对于荧光性能, MTMS和VTES可使其有一定的提高, 但它们的最大含量不能超过50%, 否则凝胶易失透, 而GPTMS能大幅提高凝胶的荧光性能. 通过综合比较, 选取出各种性能都较好的配方, 为今后制备较实用的具有较强荧光的含铕的凝胶玻璃提供了一定的依据.

Effect of Organically Modifying Precursors on the Structure and Properties of Europium Chelate Doped Silica Gel Glass

By using 3-glycidoxypropyltrimethoxysilane (GPTMS), methyltrimethoxysilane (MTMS) and vinyltriethoxysilane (VTES) respectively as organically modifying precursors, three types of organically modified silicate (ormosil) glass co-doped with Eu^3＋ ion, β-diketone 2-thenoyltrifluoroacetone (TTA) and synergic agent 1,10-phenanthroline (phen) were prepared via in situ sol-gel method. The photoluminescence (PL) and infrared absorption (IR) spectra, XRD, SEM and TG-DSC measurements were performed. The influence of the organically modifying precursors and heat-treatment temperatures on the thermal, mechanical and photoluminescence properties of rare earth organic complex doped silica glass was also investigated. The results indicated that the organically modifying precursors could densify the gel glass, but the thermal stability was reduced simultaneously. As for the photoluminescence property, it could be improved by MTMS and VTES to some degree, but the maximum contents should be less than 50% to avoid the opacification. GPTMS could increase the photoluminescence of the gel greatly. Considering the thermal stability, mechanical and photoluminescence properties in a whole, the optimum contents were chosen. The results can provide certain basis to manufacture high photoluminescence silica gel glass materials containing europium ion in the future.