Scientists have created a fabric that can automatically regulate the amount of heat passing through it, helping people stay cool or warm depending on weather conditions. The body, the fabric allows heat to pass.
Researchers at the University of Maryland in the United States created a fabric made of specially constructed yarn covered with conductive metal.
This is the first textiles. It is shown that they are able to regulate heat exchange with the environment, according to a study published in the journal Science.
In hot, humid conditions, yarn yarns are compact and activate a coating that changes the way the tissue interacts with the infrared
They refer to the effect as a "strobing" of infrared radiation that acts as a transforming blind to transmit or block heat. YuHuang Wang, Professor at the University of Maryland
The base yarn for this new textile is made up of fibers made of two different synthetic materials ̵
Threads are covered with carbon nanotubes, a special class of light, carbon, conductive metal. Since the materials in the fibers resist and absorb water, the fibers are deformed when exposed to moisture, for example, the surrounding sweat body.
This distortion brings the thread of yarn that opens the pores in the fabric.
This also changes the electromagnetic bond between the carbon nanotubes in the coating, the researchers said.
"You can think of this effect, like the bend of the radio, an antenna to change the wavelength or the frequency with which it resonates," said Van.
"It's a very simplistic way to think about it, but imagine that the two antennas are close to each other to regulate the kind of electromagnetic wave they pick," he said.
"When the fibers get closer, the radiation interacts with the changes. In clothing, this means that the tissue interacts with the heat that emits from the human body," he added.
Depending on the setting, the fabric either blocks the infrared radiation, or allows it to pass. The reaction is almost instantaneous, so before people realize that they are hot, the clothes can already cool them down.  On the other hand, when the body cools down, the dynamic ghosting mechanism works in the opposite direction to capture heat
"The human body is an ideal radiator, it quickly radiates heat," said Min Owyan, a professor at the University of Maryland.
"In all history, the only way to regulate the radiator was to remove clothes or put clothes, but this fabric is a true bidirectional regulator," Owyan said