News · 7 November 2026
Illinois prints a textile that cools in sun and senses motion
A University of Illinois Urbana-Champaign team has printed a textile that stays 3 to 6 °C below the air in direct sunlight and turns body movement into electrical signals.1 The signals can switch on a fabric heater when the wearer moves. The paper appeared in Advanced Science on 15 June 2026;1 the university announced it on 6 November 2026.2
What they made
- Material: silicone rubber (PDMS) filled with zirconium oxide nanoparticles, printed into a fibre-structured textile by direct ink writing (a form of 3D printing).1
- Cooling: the zirconium oxide scatters sunlight — the textile reflects 96% and emits 97% in the mid-infrared.
- Sensing: the same particles boost the static charge the textile builds when it touches and leaves skin — the triboelectric effect, the same one behind a doorknob shock.1
- Harvesting: a peak power density of 47 mW per square metre, stable over 30,000 cycles.
- Demoed as: an elbow-bend sensor, a finger-gesture reader for American Sign Language letters, a capacitor that ran a calculator, and 26 LEDs spelling "UIUC" by tapping.1
How the cooling and heating work together
- In sun: the textile cools passively. Outdoors in Urbana, Illinois, on 2 August 2024, it was compared with bare skin, white cotton and a silver-coated fabric on heated skin simulators.1
- On movement: the textile's own signal tells an Arduino board to close a relay for one second each time the signal passes 4 volts, switching on a heater layer underneath.1
What is still missing
- The heater isn't powered by motion: in tests it ran from a laboratory DC supply; the motion signal only flipped the switch. Harvested power is 47 mW per square metre against the 10 W per square metre the heater used.1
- "Washable" is limited: 10 wash cycles of 5 minutes each in a mini washing machine at 30 °C — and the team checked optical performance before and after, not electrical output.1
Our view: a useful step for clothing that manages heat without a battery doing all the work. It is a lab demo on one material — no garment, no electrical wash data and no company behind it yet.
Sources
- Choi, Karua, Salauddin and Cai, "Intrinsic Coupling of Radiative Cooling and Triboelectric Responses in Dual-Function ZrO2 Nanocomposites for Adaptive Thermoregulation", Advanced Science, 2026-06-15. doi.org/10.1002/advs.76121
- University of Illinois Grainger College of Engineering, "Cool, Power, Move: A Printable Material That Does It All" (via Newswise), 2026-11-06. www.newswise.com