光响应螺噁嗪掺杂长余辉发光纤维的制备及其性能  

Preparation and performance of photoresponsive long-afterglow phosphorescent fibers with spirooxazine doping

作　　者：王小艳 杨书康 肖国威 杜金梅 许长海[1] WANG Xiaoyan;YANG Shukang;XIAO Guowei;DU Jinmei;XU Changhai(College of Textiles and Clothing,Qingdao University,Qingdao,Shandong 266071,China)

机构地区：[1]青岛大学纺织服装学院,山东青岛266071

出　　处：《纺织学报》2025年第2期1-9,共9页Journal of Textile Research

基　　金：青岛市博士后应用项目(QDBSH20230102082);国家自然科学基金青年科学基金项目(22405148)。

摘　　要：针对目前发光纤维颜色单一、制备工艺复杂等问题,将具有光响应的光致变色分子螺噁嗪(SPO)和长余辉材料间苯二甲酸(IPA)通过简单的掺杂方式引入聚氨酯纺丝液中,利用湿法纺丝制备兼具光致变色和长余辉发光特性的光刺激响应型发光纤维。研究结果表明:间苯二甲酸可作为优异的磷光供体材料掺杂进聚氨酯赋予其长余辉发光特性;当间苯二甲酸的添加量为聚氨酯纺丝液质量的12.5%时,聚氨酯纤维的长余辉发光性能最佳;利用SPO的光致变色特性调控纤维长余辉发光颜色,纤维经紫外光照射后迅速从无色变为蓝色,关闭紫外光后,其展现出蓝色渐变为绿色的动态长余辉特性,发光持续时间约7 s。相较于传统的发光纤维,此纤维既兼具了光致变色的可视化,又在时间尺度上调控了其动态多色的长余辉性能。Objective Photoresponsive luminescent fibers represent a promising new type of optical functional material for applications in optics,sensing,and biomedicine.Many efforts have been focused on photochromic fibers and fluorescent fibers to develop photoresponsive fibers.However,long-afterglow luminescent fibers as a type of photoresponsive fibers are still rare,partially related to the process complexity,dependance on advanced technologies,specialized equipment,and high preparation costs.Method In this work,spirooxazine(SPO)with photochromic properties and long-afterglow material isophthalic acid(IPA)were introduced into the polyurethane spinning solution through doping.A stimuli responsive luminescent polyurethane fiber was prepared using wet spinning.The effect of doping amount of IPA on the long-afterglow luminescence performance of fibers was investigated.The dynamic multi-color long-afterglow luminescence properties of polyurethane fibers were characterized by the phosphorescence spectra,long-lived phosphorescence lifetime and the afterglow luminescent images.Results The fluorescence emission positions of polyurethane fibers with different mass fractions of isophthalic acid(IPA)were found almost the same,with a significant fluorescence emission characteristic peak at 404 nm.However,the fluorescence emission band of the fibers was relatively broad when the doping mass fraction of IPA was below 10%,and it became noticeably narrower when the content exceeded 10%.The phosphorescence emission intensity of polyurethane fibers gradually increased as the mass fractions of IPA increased.However,there was no significant improvement in the phosphorescence intensity,the afterglow duration and the luminance of the polyurethane fibers when the mass fraction of IPA increased from 12.5%to 15.0%,indicating an optimal doping IPA mass concentration was 12.5%.The afterglow luminescent polyurethane fibers displayed a bright green afterglow lasting over 7 s after the UV light was removed.In addition,the long-lived phosphorescence l

关 键 词：聚氨酯 光致变色 螺噁嗪 间苯二甲酸 湿法纺丝 发光纤维 

分 类 号：TQ342.89[化学工程—化纤工业]