A high-tech textile to stay comfortable outdoors

A high-tech textile to stay comfortable outdoors
Thermal imaging shows how a square of the new textile (dashed lines) traps heat in heating mode (top), while reflecting it in cooling mode (bottom). Credit: Adapted from Nano Letters

Clothing, from tank tops to parkas, helps people adapt to temperatures outdoors. But you can only put on or take off so much of it, and fluctuations in weather can render what you are wearing entirely inadequate. In a new study in ACS' Nano Letters, researchers describe a high-tech alternative: a reversible textile they designed to trap warmth in the cold and reflect it during hot weather, all while generating small amounts of electricity.

Previous attempts to develop such sophisticated textiles for outdoor use have generally focused on either capturing thermal radiation or dispersing it. To integrate the two, Qiang Li, Min Qiu and colleagues made a layered fabric made of porous fibrous polymers. To trap warmth in the cold, they coated the heating side in zinc and copper nanoparticles to absorb and keep in thermal radiation from the body. To release heat in the hot sun, they placed a hierarchically porous structure on the cooling side to reflect sunlight and dissipate human body radiation. In the sun, the heating side increased a simulated skin's by as much as 14 F more than did black cotton. With the cooling side out, the dropped the temperature by 11 F compared to white cotton.

In night tests, the heating side warmed the simulated skin by 5 F more than black cotton, but the cooling side did not result in a lower temperature. By attaching a small thermoelectric generator to the textile, the researchers could harness the between its and skin to produce a small amount of electricity. They say the textile is easy and inexpensive to fabricate and has breathability comparable to cotton. This textile creates new possibilities for many technologies, such as multi-functional camouflage or clothing that can generate electricity to someday power wearable electronics, the researchers say.

More information: Hao Luo et al. Outdoor Personal Thermal Management with Simultaneous Electricity Generation, Nano Letters (2021). DOI: 10.1021/acs.nanolett.1c00400

Journal information: Nano Letters

Citation: A high-tech textile to stay comfortable outdoors (2021, May 5) retrieved 23 July 2024 from https://phys.org/news/2021-05-high-tech-textile-comfortable-outdoors.html
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