A research team at the University of Maryland in the United States has developed a fabric that automatically adjusts to the temperature and humidity, and is expected to be used to make "smart" clothing.
This fabric is made of a special yarn covered with conductive carbon nanotubes. This yarn consists of two composite materials , one that absorbs water and one that repels water. The fabric allows more heat to pass through when the body sweats causing warmth and humidity. When cold and dry, the fabric reduces heat escape.
In wet conditions, the fibers in the fabric will curl, opening the holes in the fabric and changing the electromagnetic coupling effect of the carbon nanotubes to "release" the heat radiation in the body. This change can happen quickly, and cooling is achieved before people become aware of the heat. Conversely, when the body temperature is lowered, this mechanism can block heat radiation and achieve warmth.
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