A group of scientists from the American UniversityWestlake and China's Zhejiang University have developed Janus fabric, consisting of multiple layers and using the unique properties of polytetrafluoroethylene eRTFE (Teflon). Janus also contains special components that provide the fabric with the ability to keep the wearer warm in winter and cool in summer.
Reversible textiles not only reflect heat intosummer heat and keeps warm during the cold season, but is also able to generate a small amount of electricity, sufficient to keep wearable mobile devices working.
Janus fabric has two orientations.In the "winter" version - the outer layer of textile, which contains nanoparticles of zinc and copper, absorbs solar energy and blocks the outflow of heat, warming the user. Turning the clothes inside out, the second, “summer” layer of Janus fabric, covered with PMMA polymer, is launched to reflect sunlight and remove excess heat.
Janus tested on samplesartificial human skin, on top of which tissue was placed in both modes of operation. When testing the "winter" side of textiles, the scientists recorded heating of the artificial leather by 10 degrees Celsius, compared to using black cotton fabric. In contrast, the “summer” version of the fabric reduced the temperature of the skin by 11.6 degrees Celsius, compared to using a white cotton fabric.
It is noteworthy that the technology of fabric productionJanus does not require large costs and complex high-tech equipment. An additional bonus when using the new fabric is the generation of electricity using a thermogenerator that operates from the temperature difference between the outer and inner layers. The amount of electricity produced by Janus garments is sufficient to power mobile electronics.