多元光色稀土夜光纤维的制备及性能

doi:10.16085/j.issn.1000-6613.2020-2320

摘要/Abstract

摘要：

为进一步促进稀土夜光纤维的光色多元化，改善其光色单一性问题，本文以SrAl₂O₄∶Eu²⁺, Dy³⁺ 和 Sr₂MgSi₂O₇∶Eu²⁺, Dy³⁺为共同发光中心，通过硅烷偶联剂作为分子桥将光转换剂结合到发光材料表面，采用聚丙烯腈成纤聚合物为基体，通过溶液纺丝法制备一种激发后在黑暗状态下可以发出多元光色的夜光纤维，制备了一种兼顾红色发光特性和持久发光性能的夜光纤维，并对其性能进行了研究。结果显示，红色光转换剂的添加没有对发光材料以及成纤聚合物的物相结构造成破坏，并且复合夜光纤维的激发光谱和发射光谱都向长波长移动，光谱发生红移；从余辉衰减曲线可知，随着光转换剂添加量的增加，纤维余辉亮度随之降低；此外，夜光纤维的光色红移程度会随着红色光转换剂质量分数的增加而增强。

关键词: 光化学, 混合物, 夜光纤维, 色谱, 多元光色

Abstract:

In order to increase the diversity of photochromic of rare earth luminous fiber and improve its single-color problem, a luminous fiber with both red luminescence characteristics and long-lasting luminescence performance was prepared by using SrAl₂O₄∶Eu²⁺, Dy³⁺ and Sr₂MgSi₂O₇∶Eu²⁺, Dy³⁺ as the common luminescent center, the silane coupling agent as a molecular bridge to bond the light conversion agent to the surface of the luminescent material, the polyacrylonitrile fiber-forming polymer as the matrix and spinning through solution method to prepare a luminous fiber that can emit multiple light colors in the dark state after excitation, and its performance was studied. The results showed that the addition of the red conversion agent did not damage the phase structure of the luminescent material and the fiber-forming polymer. The excitation and emission spectra of the composite luminous fiber moved to long wavelengths, and the spectrum had red-shifted. The afterglow curve indicated that as the amount of light conversion agent increased, the fiber afterglow brightness decreased. In addition, the degree of red shift of the light color of the luminous fiber increased with the increase of the concentration of the red conversion agent.

Key words: photochemistry, mixtures, luminous fiber, chromatography, multiple colors

中图分类号:

TQ342⁺.89

芦博慧, 饶曾慧, 史慕杨, 逄增媛, 朱亚楠. 多元光色稀土夜光纤维的制备及性能[J]. 化工进展, 2021, 40(11): 6254-6261.

LU Bohui, RAO Zenghui, SHI Muyang, PANG Zengyuan, ZHU Yanan. Preparation and performance analysis of rare earth luminous fiber with multiple colors[J]. Chemical Industry and Engineering Progress, 2021, 40(11): 6254-6261.

图/表 9

图1 不同放大倍数下夜光纤维表面的SEM照片

图2 发光纤维的微观模型示意图

图3 样品的EDS分析图

表1 样品的元素含量表

元素	质量分数%			原子分数/%
元素	（a）	（b）	（c）	（a）	（b）	（c）
Sr	4.63	37.49	30.66	0.78	9.66	8.17
Mg	0.40	5.02	0.00	0.24	4.67	0.00
Si	0.57	12.98	0.00	0.30	10.43	0.00
Al	1.00	0.00	25.74	0.55	0.00	22.28
Eu	0.59	0.91	1.25	0.06	0.11	0.19
Dy	0.54	1.02	1.34	0.05	0.12	0.19

图4 不同红色光转换剂质量分数样品的XRD图

图5 不同样品的光谱对比图（荧光波长525nm，激发波长365nm）

图6 不同红色光转换剂质量分数的样品激发和发射光谱图（荧光波长525nm，激发波长365nm）

图7 不同红色光转换剂质量分数的样品余辉亮度曲线

图8 不同红色光转换剂质量分数的样品CIE 1931色度图

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