Comprised of tiny carbon nanotubes locked up in flexible plastic fibers and made to feel like fabric, Power Felt uses temperature differences – room temperature versus body temperature, for instance – to create a charge.
When the fabric is subject to a temperature difference parallel to the surface, electrons or holes travel from the hot side to the cold side due to the Seebeck effect, which converts temperature difference into voltage.
The optimized materials exhibit high electrical conductivities and thermo-power values that are superior to other polymer-based composites. The dual-stabilized system can be used to enhance the thermoelectric properties of other organic materials for harvesting waste heat, and has the potential to be used instead of traditional inorganic semiconductor materials in thermoelectric devices. This new, flexible material also highlights the possibility of harvesting waste heat from unexpected places, such as the fibers in clothing, and the ability to convert that heat into a voltage. (Source)
Nanoporous polyethylene is created through using a specific nanostructure of polyethylene that is opaque to visible light but transparent to infrared, meaning that it isn’t see-through but allows infrared radiation through the cloth. By exposing this material to a chemical solution, it makes it permeable to water, similar to cotton fabric. As a result, the material allows for the body to release heat but still be comfortable. (Source)
Cotton reinforced with boron carbide is tough and hard but nonetheless elastic. After the nanofibres have formed, the cotton microfibers turn into boron-reinforced carbon microfibres. Unlike solid boron carbide, these fibrils are extremely elastic and flexible, allowing for Pulse products to maintain flexibility while providing extra support and protection for muscle groups and the body. (Source)