聚甲基丙烯酸甲酯/稀土复合发光材料的结构及耐水性能

PREPARATION AND WATER-RESISTANCE OF POLYMETHYL METHACRYLATE/RARE-EARTH COMPOSITE LUMINESCENT MATERIALS

采用原位乳液聚合法,制备了聚甲基丙烯酸甲酯/稀土复合发光材料。通过傅立叶变换红外光谱(FT-IR)和热失重(TG)测定,研究了复合发光材料的结构、发光特性和耐水性能。结果表明,复合发光材料中聚合物分子与稀土分子之间通过键合的方式结合;复合发光材料与稀土发光材料的激发光谱和发射光谱波长范围相近,表现出相似的发光特性;复合发光材料的耐水性优于稀土发光材料。

In this paper, the polymethyl methacrylate （PMMA）/rare-earth composite luminescent materials was prepared through grafting emulsion polymerization of methyl methacrylate onto the surface of luminescent materials. To study the structure, luminescent performance and the water-resistance of the composite luminescent materials, the ways as Fourier Transform Infrared Spectroscopy （FT-IR） and Thermo Gravimetric Analysis （TGA） were used. From the results, we can find that organic polymer parts has been attached with the inorganic parts in the composite luminescent materials. The composite luminescent materials and the luminescent materials have the same luminescent performance from the curves of emission and excitation. And pH-time curves show that the resistance to water of the composite luminescent materials is much better than that of the unmodified luminescent materials.