Scientists have invented a fabric that automatically changes properties, retaining or generating heat depending on conditions
Chemical Sciences: Clever Changes – Heat
Scientists for the first time managed to create a fabric from a specially developed yarn covered with a conductive material, which changes its thermal insulation properties depending on the conditions. environment.
Before so far there were fabrics that kept climbers warm or helped runners stay cool. Researchers from the University of Maryland managed to combine both properties in their invention. The yarn of the new textile is made of fibers containing two types of synthetic materials (one absorbs and the other repels moisture) covered with electrically conductive carbon nanotubes.
Due to the fact that the fibers are able to both resist getting wet and absorb water, they are deformed under its influence. For example, when a person sweats, moisture is released, which leads to a distortion of the structure of the threads and their convergence. First of all, it enlarges the pores of the tissue, which facilitates the release of heat and has a slight cooling effect. However, it is much more important to change the electromagnetic bonds between carbon nanotubes in the coating, as a result of which the material begins to better transmit infrared radiation..
The video shows the reaction IR strobe textiles on change.
Fibers react almost instantly, even before a person begins to feel that he is heating up. When the body cools, the transformation mechanism is radically opposite and is aimed at retaining heat.
Although scientists still have a lot of work to do before they can commercialize the fabric, they see little obstacle. for this. All base fiber materials are readily available, and the carbon coating can be applied through a standard dyeing process, they said..
Spanish researchers have also presented a new concept for a thermoelectric material, consisting of cellulose grown with help bacteria, with an admixture of a small amount of electrically conductive carbon nanotubes.
text: Ilya Bauer, photo: Faye Levine, University of Maryland, video: YouTube / Informasi Konstruktif
Breathing tester for measuring blood sugar invented