Scientists have invented a smart fabric that can raise temperatures by more than 54 degrees Fahrenheit (30 degrees Celsius) after just 10 minutes in the sun. The new material, made from specialized nanoparticles and thermoplastic polyurethane fibers, absorbs sunlight and converts it into heat. This innovation could be used in clothing designed for very cold temperatures, such as mountain rescue equipment or pet clothing.
The fabric is woven with temperature-responsive dyes that change color as the temperature increases, allowing users to visually monitor temperature fluctuations. The team behind the invention has successfully tested the material’s properties using a tiny sweater made from the new fibers. After just 10 minutes of sun exposure, the sweater reached an impressive 128.3 F (53.5 C).
The smart fabric is soft and elastic, with the ability to stretch up to five times its original size. It also retains its color- and temperature-changing properties even after repeated washing. The team plans to work on reducing production costs and scaling up the fabrication process to make the material safe for widespread use.
This innovation addresses a problem in existing wearable heaters that rely on expensive components or cumbersome battery-powered heating elements. With the potential to be used in various applications, including outdoor gear and animal clothing, this new fabric has the potential to revolutionize temperature regulation in cold environments.
Source: https://www.livescience.com/chemistry/new-fabric-can-heat-up-almost-50-degrees-to-keep-people-warm-in-ultracold-weather