Researchers at Chalmers University of Technology have developed a new type of textile that converts body heat into electrical energy by using specially treated silk threads.
How It Works
The concept revolves around a conductive silk thread that is coated in a unique plastic polymer. This polymer captures thermal energy created by the temperature difference between a person’s body and the surrounding air. This innovation brings us closer to creating wearable devices that function without batteries.
Unique Advantages
"The polymers we use have special benefits - they are flexible, lightweight, and can be applied in both liquid and solid forms while being non-toxic," explains Mariavittoria Craighero, the lead researcher and doctoral student at Chalmers.
Demonstrating the Technology
The research group presented two variations of this technology: a small button-sized gadget and a larger fabric panel. These devices generate electricity when there is a temperature difference, with the output voltage varying depending on the temperature gap and the amount of conductive material present.
The material has shown to be sturdy, remaining effective for over a year and enduring multiple washes. After undergoing seven washes, it retained about two-thirds of its conductive strength, although enhancements are needed for practical applications.
Current Production Challenges
At present, producing these thermoelectric fabrics is a time-consuming process. In the laboratory, it involves a painstaking manual method that requires careful preparation and stitching. One sample of the fabric took four days to hand stitch.
Future Implications
This innovation could revolutionize wearable technology, allowing garments to power devices such as fitness trackers and health monitors without the need for regular battery replacements. The technology harnesses the natural heat difference between our bodies and the air to continuously generate power.
This advancement represents a significant leap towards creating self-powered wearables, suggesting a future where smart clothing is comfortable, washable, and does not require battery recharging.
