Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China.
Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou, Fujian 350108, China.
ACS Appl Mater Interfaces. 2021 Jan 20;13(2):2245-2255. doi: 10.1021/acsami.0c18474. Epub 2021 Jan 8.
Self-disinfecting textile materials employing combined photodynamic/photothermal effects enable the prevention of microbial infections, a property that has great potential in healthcare applications. However, smart textiles with stimulus responses to ambient temperature are marvelous materials for enhancing their photothermal applications with additional functions. It is still challenging to realize vivid and contrasting color changes as temperature indicators. Herein, through the in situ growth of PCN-224 metal-organic frameworks (MOFs), the electrospraying of a TiC MXene colloid, and the screen printing of a thermochromic dye, a smart photothermochromic self-disinfecting textile has been fabricated. An antibacterial inactivation study revealed 99.9999% inactivation toward gram-negative ( ATCC 8099) and gram-positive ( ATCC 6538) bacteria in 30 min. A mechanism study revealed that light-driven singlet oxygen and heat are the main reasons for bacterial inactivation. Interestingly, the fabrics presented photothermal effects not only under a handheld 780 nm NIR laser but also under visible Xe lamp (λ ≥ 420 nm) illumination. The color of the fabrics (S-CF@PCN) changed completely from dark green to dark red when the temperature exceeded 45 °C under Xe lamp illumination. Furthermore, the photothermochromic effect occurred in just 1 s under a 780 nm laser. Taken together, this smart photothermochromic self-disinfecting textile permits a new way to feedback the timely signal of temperature by color change and provides novel insights into the development of self-disinfecting textiles.
采用光动力/光热组合效应的自消毒纺织材料能够防止微生物感染，这一特性在医疗保健应用中具有巨大的潜力。然而，具有环境温度刺激响应的智能纺织品是一种奇妙的材料，可以通过额外的功能来增强其光热应用。实现生动和对比鲜明的颜色变化作为温度指示剂仍然具有挑战性。在此，通过 PCN-224 金属有机骨架（MOFs）的原位生长、TiC MXene 胶体的静电纺丝和热敏染料的丝网印刷，制备了一种智能光热变色自消毒纺织品。抗菌失活动力学研究表明，在 30 分钟内对革兰氏阴性（ATCC 8099）和革兰氏阳性（ATCC 6538）细菌的灭活率达到 99.9999%。机制研究表明，光驱动的单线态氧和热是细菌失活动力的主要原因。有趣的是，这些织物不仅在手持 780nmNIR 激光下而且在可见 Xe 灯（λ≥420nm）照射下表现出光热效应。当 Xe 灯照射下温度超过 45°C 时，织物（S-CF@PCN）的颜色完全从深绿色变为深红色。此外，在 780nm 激光下，光热变色效应仅在 1s 内发生。总之，这种智能光热变色自消毒纺织品通过颜色变化为温度提供了一种新的实时信号反馈方式，并为自消毒纺织品的发展提供了新的思路。
