聚氨酯/对乙烯基苯甲酸铕光致发光材料的制备及性能

摘要

With p-vinylbenzoic acid as the ligand and rare earth europium ion as the central ion,the p-vinylbenzoic acid eu-ropium complex with the active functional group (C=C) was prepared. Then polyurethane/p-vinylbenzoic acid europium (PUR-Eu) photoluminescence materials were synthesized by introducing the complex into the polyurethane (PUR). The obtained PUR-Eu materials are amorphous. With the increase of the content of the p-vinylbenzoic acid europium complex,the transmittance of PUR-Eu material gradually decreases. When the mass fraction of the p-vinylbenzoic acid europium complex is 3%,the transmittance (46.0% ) of the material is reduced by 44.1% compared with the pure PUR (90.1%). The content of the complex has almost no effect on the thermal stability of PUR-Eu material,and the thermal decomposition temperature of all the PUR-Eu materials is above 230℃,so PUR-Eu materials have good thermal stability. The fluorescence intensity of PUR-Eu gradually increases with the increase of the p-vinylbenzoic acid europium complex.Moreover,fluorescence quenching does not occur in the range of 5% of the complex mass fraction.%以对乙烯基苯甲酸为配体,稀土铕离子为中心离子,制备出带有活性官能团(C=C)的对乙烯基苯甲酸铕配合物.将该配合物引入到聚氨酯(PUR)体系中,合成了PUR/对乙烯基苯甲酸铕(PUR-Eu)光致发光材料.PUR-Eu材料为无定形态,随着对乙烯基苯甲酸铕含量的增加,PUR-Eu材料的透光率逐渐降低,当对乙烯基苯甲酸铕质量分数为3%时,PUR-Eu材料的透光率(46.0%)与纯PUR的透光率(90.1%)相比降低了44.1%.对乙烯基苯甲酸铕的含量对PUR-Eu材料的热稳定性几乎没有影响,PUR-Eu材料的热分解温度在230℃以上,具有较好的热稳定性.PUR-Eu的荧光强度随着对乙烯基苯甲酸铕含量的增加而逐渐增大,在对乙烯基苯甲酸铕质量分数为5%以内, PUR-Eu材料没有出现荧光淬灭现象.