Duan Minghan, Wang Xingchi, Xu Wanxuan, Ma Ying, Yu Jianyong
Key Laboratory of Textile Science & Technology of Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, P. R. China.
Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, P. R. China.
ACS Appl Mater Interfaces. 2021 Dec 8;13(48):57943-57951. doi: 10.1021/acsami.1c17232. Epub 2021 Nov 24.
Smart textiles with tunable luminescence have received special attention due to their great potential in various advanced photonic applications. Particularly, the development of one-dimensional, on-demand, responsive fluorescence fibers with excellent adaptability is of great significance. Herein, we propose electro-thermochromic fluorescence fibers regulated by a self-crystallinity phase change; that is, their tunable luminescence properties are derived from the reversible conversion of the dispersion state and fluorescence emission of fluorophore molecules during the crystallization/melting processes of phase-change materials. First results obtained with an alginate wet-spinning system demonstrate that the self-crystallinity phase change can produce polymeric fibers with thermochromic fluorescence behavior, which are prepared using microemulsion particles containing a phase-change fatty acid and coumarin fluorescent dyes. These thermochromic fluorescence fibers possess a fast response speed, high emission contrast, and good reversibility (>100 cycles). Particularly, the thermochromic fluorescent fibers can gain an electrotriggered capability by means of electric heating materials, and their great potential in precision operation applications is demonstrated. It is easy to adjust the switching point of the electro-thermochromic fluorescence fibers, highlighting their potential use in a diverse range of applications, the designs of which can be personalized. This work offers a simple yet versatile strategy for constructing electro-thermochromic fluorescence fibers for advanced smart textiles.
具有可调发光特性的智能纺织品因其在各种先进光子应用中的巨大潜力而受到特别关注。特别是，开发具有优异适应性的一维、按需响应的荧光纤维具有重要意义。在此，我们提出了一种由自结晶相变调控的电热致变色荧光纤维；也就是说，它们的可调发光特性源自于相变材料结晶/熔化过程中荧光团分子分散状态和荧光发射的可逆转换。使用海藻酸钠湿法纺丝系统获得的初步结果表明，自结晶相变能够制备出具有热致变色荧光行为的聚合物纤维，这些纤维是利用含有相变脂肪酸和香豆素荧光染料的微乳液颗粒制备而成的。这些热致变色荧光纤维具有快速的响应速度、高发射对比度和良好的可逆性（>100个循环）。特别是，热致变色荧光纤维可以通过电加热材料获得电触发能力，并展示出其在精密操作应用中的巨大潜力。电致变色荧光纤维的开关点易于调节，突出了它们在各种应用中的潜在用途，其设计可以个性化。这项工作为构建用于先进智能纺织品的电致变色荧光纤维提供了一种简单而通用的策略。
