Scientists for the first time managed to create a specially developed yarn fabric covered with conductive material, which changes its thermal insulation properties, depending on the environmental conditions.
So far, there were fabrics that warmed climbers or helped the runners save coolness. Researchers from the University of Maryland, in their invention, managed to combine both properties. New textiles yarn is made of fibers containing two types of synthetic materials (one absorbs, and the second pushes moisture) coated with electrically conductive carbon nanotubes.
Due to the fact that the fibers are capable of how to resist wetting and absorb water, they deform under its effect. For example, when a person sweats, moisture is released, which leads to the distortion of the structure of the threads and their rapprochement. First of all, it increases the pores of the tissue, which simplifies the outlet of the heat and has a slight cooling effect. However, much more important is the change in electromagnetic bonds between carbon nanotubes in the coating, as a result of which the material begins to skip infrared radiation better.
Fibers react almost instantly, even before a person begins to feel that it is heated. When the body is cooled, the transformation mechanism is radically opposite and aimed at keeping heat.
Although scientists still have to do a lot of work before they can make a cloth with a commercial product, but they do not see any special obstacles for this. According to them, all materials for basic fiber are easily accessible, and the carbon coating can be applied in the process of standard staining.
Spanish researchers also submitted