An experimental double-sided fabric developed by scientists from China's Zhejiang University and
Against the backdrop of a regular cotton T-shirt, the square of the fabric either traps body heat or reflects the sun's heat, depending on which side is facing outward.
Based on materials from Nano Letters 2021, DOI: 10.1021 / acs.nanolett.1c00400
Polytetrafluoroethylene (or simply PTFE) is a productpolymerization of tetrafluoroethylene, in technical circles better known as "fluoroplastic". PTFE was discovered in 1938, and now it is almost impossible to imagine some mechanisms without it. This chemically produced plastic is used in the automotive, chemical, and food industries, hydraulics and even medicine.
When clothes made of this material are worn with the warming side outward, the zinc and copper nanoparticles on it absorbsolar energy and reduce the amount of heat that goes awayWhen the wearer turns the garment inside out, the porous coating of the PMMA (polymethyl methacrylate) polymer on the cooling side, now facing outward, reflectsSunlight helps to reduce body heat.
Polymethyl methacrylate, or organic glass -synthetic vinyl polymer of methyl methacrylate, thermoplastic transparent plastic, known under the names of plexiglass, acrima, novattro, plexime, limacryl, plascril, acrylex, acrylite and others.
In tests conducted under natural sunlight, the heating side raised the temperature of imitation leather more than black cotton.When the cloth was inverted, the cooling side lowered the temperature of the skin more thanwhite cloth.
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