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New fabric can heat up almost 50 degrees to keep people warm in ultracold weather
A new smart fabric converts light into heat and can raise temperatures by more than 54 degrees Fahrenheit (30 degrees Celsius) after just 10 minutes in the sun.
Such fabrics could be used in mountain rescue equipment and even pet clothing, but existing designs typically rely on expensive components such as metal nanomaterials or cumbersome battery-powered heating elements. Nanoparticles of the two polymers — polyaniline (PANI) and polydopamine (PDA) — are embedded within a matrix of thermoplastic polyurethane (PTU) fibers, a material widely used to produce waterproof clothing and sportswear. The smart fabric has a soft and elastic texture, which allows the material to stretch by as much as five times its original size and retain its color- and temperature-changing properties even after 25 washes, according to the study.
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