Flexible thermochromic fabrics enabling dynamic colored display

Color-changeable fbers can provide diverse functions for intelligent wearable devices such as novel information displays and human-machine interfaces when woven into fabric.This work develops a low-cost,efective,and scalable strategy to produce thermochromic fbers by wet spinning.Through a combination of diferent thermochromic microcapsules,fexible fbers with abundant and reversible color changes are obtained.These color changes can be clearly observed by the naked eye.It is also found that the fbers exhibit excellent color-changing stability even after 8000 thermal cycles.Moreover,the thermochromic fbers can be fabricated on a large scale and easily woven or implanted into various fabrics with good mechanical performance.Driven by their good mechanical and physical characteristics,applications of thermochromic fbers in dynamic colored display are demonstrated.Dynamic quick response(QR)code display and recognition are successfully realized with thermochromic fabrics.This work well confrms the potential applications of thermochromic fbers in smart textiles,wearable devices,fexible displays,and human-machine interfaces.