以金属硝酸盐为原料,乙二胺四乙酸(EDTA)为络合剂,采用络合法制备了Eu2+,Dy3+掺杂SrAl2O4的发光材料,并通过偶联剂改性和接枝聚合的方式制备了发光材料/聚甲基丙烯酸甲酯(PMMA)复合材料.探讨了焙烧温度对产物结构的影响.采用热重-差热分析(TG-DTA)、X射线衍射(XRD)、傅里叶红外光谱(FT-IR)和发光光谱对所制备干凝胶的热分解行为、产物的结晶行为与改性包覆前后结构与发光性能的变化进行了表征.结果表明,在1 000 ℃相对较低的温度下可以获得单相的SrAl2O4∶Eu2+,Dy3+,包覆前后材料的结构与发光特性基本未发生变化,而耐水性能得到较大改善,有利于发光材料在潮湿或水性体系中的拓展应用.
SrAl2O4∶Eu2+, Dy3+ was prepared by a complexing process using corresponding metal nitrates as raw materials and ethylene diamine tetraacetic acid (EDTA) as complexing agent.PMMA/SrAl2O4∶Eu2+, Dy3+ luminescent materials were synthesized via coupling agent modification and graft polymerization.The effect of calcination temperature on the crystal structure was studied.The thermal decomposition of dry gel, crystallization behavior, structure and luminescent properties before and after coating were characterized by TG-DTA, XRD, FT-IR and photoluminescence.The results indicate that the formation of single phase SrAl2O4∶Eu2+, Dy3+can be achieved at a relatively low temperature of 1 000 ℃.The structure and luminescent properties were not changed by coating process.However, the water resistance was improved.This helps to expand the application of luminescent materials in wet or aqueous systems.
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