PET夜光纤维中SrAl_(2)O_(4)∶Eu^(2+),Dy^(3+)的回收及发光性能研究

Study on the luminescence of SrAl_(2)O_(4)∶Eu^(2+),Dy^(3+) materials recovered from luminescent polyester fiber

为探究SrAl_(2)O_(4)∶Eu^(2+),Dy^(3+)稀土发光材料循环再生利用的可行性,以废弃夜光聚酯(PET)长丝作为原材料,采用乙二醇醇解法降解夜光PET长丝。回收夜光纤维中的发光材料SrAl_(2)O_(4)∶Eu^(2+),Dy^(3+)。并通过改变催化剂(乙酸锌)的用量,探究催化剂含量对回收夜光纤维中发光材料性能的影响。利用扫描电镜、X射线衍射仪、荧光余辉亮度测试仪和荧光光谱仪对夜光纤维中回收得到的发光材料的表面形貌和发光性能进行分析与表征。结果表明:发光材料的X射线衍射峰与PDF卡片基本一致,纺丝和降解过程不影响发光材料的光色特性和余晖衰减规律;当催化剂添加质量为0.5%时,回收得到的夜光粉纯度为91.67%,初始余晖亮度达到4.0891cd/m^(2)。

In order to explore the feasibility of recycling SrAl_(2)O_(4)∶Eu^(2+),Dy^(3+)rare earth light-emitting materials,using waste luminous polyester fibers as raw materials,glycol alcohol hydrolysis was used to degrade the luminous polyester fibers.By changing the amount of zinc acetate catalyst,the effect of the amount of catalyst on the alcoholysis reaction and the properties of luminous powder was analyzed.And then scanning electron microscopy,X-ray diffractometer,fluorescence afterglow brightness tester and radiation spectrum analyzer were used to analyze and characterized the surface morphology and luminous properties of luminous powder.The results shown that the spinning and degradation process had little impact on the fluorescence performance and afterglow decay laws.When the catalyst addition amount was 0.5 wt%,the recycled luminous powder had the best purity of 91.67%,and the initial afterglow brightness reached 4.0891 cd/m^(2).