Smart clothing cools, warms and heals
A sophisticated peristaltic pump developed by EPFL scientists is said to significantly increase well-being.
Researchers of the Swiss Federal Institute of Technology Lausanne (EPFL) have developed a sophisticated ventilation system without classic pumps for smart clothing of the future. "We are presenting the world's first pump in the form of a fiber. It's essentially tubing that generates its own pressure and flow," said Herbert Shea, head of development. He and his team use a physical principle called electrohydrodynamics.
Fiber pump for weaving
Two spiral electrodes embedded in the wall of the tube ionize and accelerate molecules of a special non-conducting liquid, which may be hot or cold. The ionic motion and electrode shape create a flow that circulates the fluid. This results in quiet, vibration-free operation and requires only a palm-sized rechargeable battery.
To achieve the wall's unique structure, EPFL scientists have developed a novel manufacturing technique in which copper wires and polyurethane threads are twisted around a steel rod and then fused with heat. After the rod is removed, the two-millimeter-thick fibers can be incorporated into textiles using standard weaving techniques or drawn into knitwear.
Robust construction washable
The simple design of the pump has a number of advantages. The materials required are cheap and readily available, and the manufacturing process can be easily scaled. Since the pressure generated in the hose is directly related to its length, it can be cut to suit the application, optimizing performance while minimizing weight. Because of the robust construction, textiles equipped in this way can be washed with conventional detergents, it says.
The innovative textiles can also be used for therapeutic applications, such as cooling inflammation, the scientists say. Athletes could use them to warm up cold muscles. "We believe this innovation will fundamentally change wearable technology," Shea concludes.
Source: Press text.com
