Scientists have developed nano-new fabrics that are expected to be widely used in the apparel industry.

A team at Stanford University reported in the journal Science on the 1st that they have developed a new type of fabric that is cheap and can reflect the sun's rays while allowing body heat to escape as much as possible. It will make people feel super cool.

Most of the heat of the human body is radiated outward in the form of infrared rays. The working principle of the infrared night vision device is to detect the infrared rays radiated by the human body at night. Cui Wei, an associate professor in the Department of Materials Science and Engineering at Stanford University, who is in charge of the study, said that the super-cool "cloth" needs to be satisfied by allowing the body to scatter the infrared light as unobstructed as possible, while being opaque to visible light. Body.

According to reports, the new fabric is made of nanoporous polyethylene. This type of polyethylene material is commonly used in lithium battery production. Its nanopores can scatter visible light with a wavelength of 0.4 micron to 0.7 micron, but let the human infrared rays with a wavelength of 7 micrometers to 14 micrometers pass through almost unimpeded, while the nanopores are surface-modified. It has good breathability and water permeability.

Comparative experiments show that the new fabric only increases the skin temperature by 0.8 degrees Celsius, while the cotton will increase by 3.5 degrees Celsius, and the commercially available polyethylene fabric will increase by 2.9 degrees Celsius. That is to say, compared with cotton fabrics and commercially available polyethylene fabrics, clothes made of new fabrics can make people feel much cooler and can reduce the use of air conditioners and fans.

Cui Wei said that this nanoporous polyethylene is expected to be widely used in the clothing industry, especially in the sportswear industry. They are now developing the first generation of non-woven fabrics , and will also develop the second generation of textile super cool materials, which will have the same mechanical strength and performance as real fabrics, but will also be super "cool".