Description:
<p>Passive daytime radiative cooling materials have attracted increasing attention due to theirgreat potential for energy saving and the possibility to meet the need for smart clothes.However, the practical application of passive daytime cooling material in the textile industryis greatly affected by comfort components and also physical/mechanical properties that requireoptimization. Herein, it was aimed to develop a thermoregulating fabric using zinc oxidenanoparticles (ZnO), which provide dynamic and passive control of the infrared transmission,by adapting to the ambient temperature. For this aim, the cotton fabric was coated with ananocomposite treatment composed of ZnO nanoparticles and temperature-responsive shapememory polyurethane (SMPU) matrix, obtaining strong scattering effects to control thewideband transmission of thermal radiation and also adaptive comfort features based on shapememory function. By reflecting sunlight of SMPU-ZnO nanocomposite coating, the cottonfabric can reach an average temperature drop of ∼ 2.2°C and 0.4°C compared to the raw onesunder direct sunlight and also indoor at 40°C, respectively. Also, SMPU and SMPU-ZnOnanocomposite coated cotton fabric exhibited dynamic air and water vapour permeability henceadaptive comfort features. Owing to passive cooling and also adaptive comfort features besidesthe simple production process, this smart fabric is promising to be widely used in sports orprotective clothing areas. <br></p>