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采用微波沉淀法合成了CaCO3:Eu3+(CEP)红色荧光粉,然后将硬脂酸改性后的CEP(c-CEP)添加到聚丙烯(polypropylene,PP)中制备了PP/CaCO3:Eu3+(PP/c-CEP)复合材料。通过荧光粉的光致发光光谱和激发光谱、扫描电子显微镜、差示扫描量热法研究了改性剂和荧光粉添加量对复合材料的结构、力学性能和发光性能的影响。结果表明:硬脂酸改性荧光粉(c-CEP)可均匀分布在PP中,且c-CEP的荧光强度强于CEP和PP/c-CEP复合材料;随着c-CEP添加量的增加,PP/c-CEP复合材料的发光强度增强,其发射主峰位于614nm处,归属于Eu3+的5D0→7F2跃迁;与PP相比,PP/c-CEP复合材料的力学性能几乎没有发生变化,但结晶速率提高,熔点升高,结晶度降低。
The CaCO3: Eu3 + (CEP) red phosphor was synthesized by microwave precipitation and the stearic acid-modified CEP (c-CEP) was added to polypropylene (PP) to prepare PP / CaCO3: Eu3 + / c-CEP) composite. The effects of modifier and phosphor addition amount on the structure, mechanical properties and luminescent properties of the composites were studied by photoluminescence spectra and excitation spectra of phosphors, scanning electron microscopy and differential scanning calorimetry. The results showed that stearic acid-modified phosphor (c-CEP) could be homogeneously distributed in PP and the fluorescence intensity of c-CEP was stronger than that of CEP and PP / c-CEP composites. With the increase of c- , The emission intensity of PP / c-CEP composites increases with the emission peak located at 614 nm and belongs to the 5D0 → 7F2 transition of Eu3 +. Compared with PP, the mechanical properties of PP / c-CEP composites have almost no change, The crystallization rate increases, the melting point increases, and the crystallinity decreases.