稀土掺杂碳酸钙/聚丙烯可调色复合材料的制备及性能（英文）

Preparation and Properties of Rare Earth Element Doped Calcium Carbonate/Polypropylene Luminescence-tunable Materials

采用微波辅助共沉淀法合成CaCO_3:RE^(3+)(RE=Eu,Tb,Ce)荧光粉,然后与聚丙烯(PP)密炼制备成CaCO_3:RE^(3+)/PP可调色复合材料。通过光致发光光谱和激发光谱、色坐标、X射线衍射仪、扫描电子显微镜,研究了不同荧光粉的添加对复合材料力学性能和发光性能的影响。结果表明:荧光粉能均匀分布在PP中,且荧光粉含量(质量分数)为5%时,复合材料的综合力学性能和发光性能最佳;CaCO_3:Eu^(3+)/PP、CaCO_3:Tb^(3+)/PP和CaCO_3:Ce^(3+)/PP在紫外灯照射下分别发出红色、绿色和紫色光;通过改变不同荧光粉的含量能够有效调节复合材料发光颜色;改变激发波长同样能达到对复合材料调色的目的。

CaCO3：RE3＋（RE=Eu, Tb, Ce） phosphors were synthesized via a microwave co-precipitation method. The luminescence-tunable composite of CaCO3：RE3＋/PP （polypropylene） was prepared by a melt blending method. The photoluminescence and mechanical properties of the composites were characterized by photoluminescence excitation and emission spectroscopy, chromaticity coordinates, scanning electronic microscopy and X-ray powder diffraction, respectively. The results show that the phosphors have a good compatibility with PP. When 5% （in mass fraction） CaCO3：RE3＋ is incorporated into PP, the mechanical and photoluminescence properties of composite are preferable. In addition, CaCO3：Eu3＋/PP emits a red color, CaCO3：Tb3＋/PP emits a green color and CaCO3：Ce3＋/PP emits a purple color under the ultraviolet light, and the emitting color of composites can be shifted among red, green and purple region by altering the ratio of phosphors or excitation wavelength.