A High Temperature Resistant and Sewable Aromatic Multiscale Fiber for Rapid Identification in Fire Rescue

In the research of modern photoelectric materials, high temperature resistant luminous fibers with long luminous duration and excellent sewing properties have attracted the interest of researchers. Here, we introduce a continuous manufacturing strategy based on microfluidic wet-spinning technology for the preparation of high temperature resistant and long persistent luminescent fibers. Luminescent fibers can continuously glow for 3 h, the quantum yield is as high as 42.8%, and they have high luminescence intensity at ambient temperatures of 50–200 °C. At the same time, the limiting oxygen index of the luminescent fiber is close to 30%, indicating excellent flame retardancy. In addition, the luminous fiber also has a tensile strength of 18.9 MPa and a good sewability. Overall, this simple and continuous processing strategy for high temperature luminescent fibers provides a potential solution for the practical application of wearable luminescent fibers or fabrics in the field of fire rescue.