Study on the preparation and color-changing properties of smart fabric based on temperature-sensitive/light-sensitive dual-response

Abstract

The smart fabric based on temperature-sensitive/light-sensitive dual-response is a functional fabric that can change color with temperature and emit green light in the dark after being excited by light. Prepared by silk-screen printing technology, it is made of temperature-responsive polymers, rare earth photosensitive paste, adhesives, thickeners, and other materials. When the temperature-responsive polymer is 10%, the rare earth photosensitive paste is 12%, and the adhesive is 25%, the printed cotton fabrics had the highest K/S value, the best abrasion resistance, and the best soaping color fastness. After 30 heating and cooling tests, the color depth and temperature-sensitive discoloration performance of the fabrics were still good. The fabric prepared by mixing orange and blue temperature-sensitive color change microcapsules and rare earth light response materials with different mass ratios can obtain continuous multi-color effect at 31–40 °C. Under the excitation of 365 nm wavelength, the fabric appears the characteristic green light of SrAl2O4: Eu2+, Dy3+ luminescent materials. With the increase of temperature, the emission intensity increases first and then decreases. The luminance of the fabric after heating is obviously higher than that under the room temperature.