Guo Yongmei, Hu Zixi, Zhan Luyao, Liu Yongkun, Sun Luping, Ma Ying
Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Clothing and Design Faculty, Minjiang University, Fuzhou 350108, China.
Engineering Research Center of Technical Textiles, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China.
Polymers (Basel). 2024 Dec 21;16(24):3575. doi: 10.3390/polym16243575.
Smart fibers with tunable luminescence properties, as a new form of visual output, present the potential to revolutionize personal living habits in the future and are receiving more and more attention. However, a huge challenge of smart fibers as wearable materials is their stretching capability for seamless integration with the human body. Herein, stretchable thermochromic fluorescent fibers are prepared based on self-crystallinity phase change, using elastic polyurethane (PU) as the fiber matrix, to meet the dynamic requirements of the human body. The switching fluorescence-emitting characteristic of the fibers is derived from the reversible conversion of the dispersion/aggregation state of the fluorophore coumarin 6 (C6) and the quencher methylene blue (MB) in the phase-change material hexadecanoic acid (HcA) during heating/cooling processes. Considering the important role of phase-change materials, thermochromic fluorescent dye is encapsuled in the solid state via the piercing-solidifying method to avoid the dissolution of HcA by the organic solvent of the PU spinning solution and maintain excellent thermochromic behavior in the fibers. The fibers obtained by wet spinning exhibit good fluorescent emission contrast and reversibility, as well as high elasticity of 800% elongation. This work presents a strategy for constructing stretchable smart luminescence fibers for human-machine interaction and communications.
具有可调发光特性的智能纤维作为一种新的视觉输出形式，具有在未来彻底改变个人生活习惯的潜力，正受到越来越多的关注。然而，智能纤维作为可穿戴材料面临的一个巨大挑战是其与人体无缝集成的拉伸能力。在此，基于自结晶相变，以弹性聚氨酯（PU）为纤维基质制备了可拉伸热致变色荧光纤维，以满足人体的动态需求。纤维的开关荧光发射特性源于在加热/冷却过程中，荧光团香豆素6（C6）和猝灭剂亚甲基蓝（MB）在相变材料十六烷酸（HcA）中的分散/聚集状态的可逆转换。考虑到相变材料的重要作用，通过穿刺固化法将热致变色荧光染料以固态形式封装，以避免HcA被PU纺丝溶液的有机溶剂溶解，并在纤维中保持优异的热致变色行为。通过湿法纺丝获得的纤维表现出良好的荧光发射对比度和可逆性，以及800%伸长率的高弹性。这项工作提出了一种构建用于人机交互和通信的可拉伸智能发光纤维的策略。
