Press the button on the clothes, and the graphene heating material in the neck and waist of the clothes will heat up to 55°C, providing a steady stream of warmth for people in cold environments. Such heating clothing has been applied to the Beijing Winter Olympics, not only resistant to rubbing, but also washable.
Products such as graphene-heated scarves, vests, gloves and socks can provide warmth to people in cold environments.
BJAS Graphene Material Technology Corporation undertook the special research and development work of the key topic of "Graphene Intelligent Heating Products and Thermal Support Application in Low Temperature Environment" in Beijing Winter Olympics.
The Hay Think team will reveal the application of graphene heating technology in the Winter Olympics.
"Cloth" that can heat
This time, BJAS's graphene heating products for the Beijing Winter Olympics include scarves, gloves, socks and vests.
In this Winter Olympics test event, the staff experienced the graphene heating down vest. "The down jacket has been wet by snow, and the button on the clothes is activated, and the graphene material quickly heats up, drying the moisture on the down jacket and bringing heat at the same time."
This magical effect comes from a piece of "cloth" that generates heat.
Graphene is currently the material with the highest thermal conductivity. Under the condition of electrification, the carbon molecules rub and collide with each other to generate heat energy, and the heat energy is evenly radiated in a plane way through far infrared rays, which can be well received by the human body. Generates warmth from the inside out.
In order to ensure the Winter Olympics, BJAS has developed the world's leading graphene textile flexible heating material. The researchers used graphene and carbon nanotube dispersion to assist in processing, and made a "cloth" that can generate heat. This innovative technology enables the graphene textile flexible heating material not only to have excellent thermal conductivity, but also to have the advantages of washing resistance, softness, lightness, comfort and durability of ordinary fabrics. It can be repeatedly washed, rubbed and cut. Does not affect efficacy.
It is not easy to make "cloth" that can heat. "There are many technical barriers here. In the process of electrothermal conversion, only by making the "square resistance" small, can electrical energy be converted into heat energy at a small voltage.
"Because the square resistance of the heating material is small, the heating clothing can use direct current lower than 36V, and it is also safe to soak in water. Another technical difficulty is that the graphene polymer material is added to the circuit and fused with clothes, carpets, etc. , To this end, researchers have also managed to overcome this process.
At the scene, we saw that a small power bank was connected to the graphene heating vest with a wire. Due to the relatively high thermal management effect of the graphene textile flexible heating material, in the environment of minus 20 ℃ in the Yanqing and Zhangjiakou competition areas, the graphene heating scarves, vests, gloves and socks can quickly heat up to 38 ℃ -53 ℃, continuous Fever for 2-4 hours to meet the different needs of various types of work in various venues.
In addition to keeping people warm, the graphene textile flexible heating material can also be used as a "coat" for equipment. At this Winter Olympics, the presentation of exciting events is inseparable from cloud broadcasting technology. In order to solve the problem that cloud broadcast equipment is difficult to operate in a low temperature environment, the company used graphene materials to develop a cloud broadcast backpack inner bag, which can be heated to 50 °C in an instant, and is equipped with a low-temperature battery to ensure that the cloud broadcast backpack can effectively cope with low temperature challenges.
In the future, the graphene flexible fabric low-temperature environment intelligent heating technology will also provide more professional technical solutions and terminal products in the fields of automobile thermal management system, low-temperature environment special heating clothing and apparel, medical and health equipment, etc., so that the whole people can share the scientific and technological achievements of the Winter Olympics.
Graphene can also be used as masks, bulletproof helmets
The thickness of single-layer graphene is only 0.35 nanometers, which is the thinnest known two-dimensional material in the world. It has rich and peculiar physical and chemical properties, such as outstanding thermal conductivity and mechanical properties, extraordinary electron transfer properties, and certain antibacterial properties. It can be used in the fields of electronics, information, energy, physics, biomedicine and materials science.
Graphene masks, graphene bulletproof helmets, graphene batteries… At the Beijing Graphene Technology Research Institute, the reporter saw other application scenarios of graphene.
According to Wang Gang, deputy director of Beijing Graphene Technology Research Institute, graphene masks are the key filter layers between spunbond non-woven fabrics that constitute ordinary masks, and a meltblown graphene-modified polypropylene material is innovatively applied. cloth. Compared with ordinary masks, the new graphene masks have the characteristics of strong antibacterial properties, better air permeability, and longer use time.
Graphene has lipophilic and hydrophobic properties, which reduces the influence of water vapor generated during breathing on electrostatic electrets, effectively improves the protection time of masks, and can be worn for a long time, and the protection time is 10 times that of traditional masks.
Graphene is very hard, and its hardness is 150 times harder than steel at normal temperature. Therefore, the application of graphene in rubber, plastic, metal and other materials will make these materials stronger. Graphene composite armor is a new type of bulletproof material pioneered in the world. It has good strength and toughness. It can be used to make bulletproof vests, bulletproof helmets, etc., and it also has the characteristics of light weight. Graphene is also a good light-transmitting material, suitable for use as LCD screens.
Graphene batteries are also getting attention. Taking the graphene disposable AAA battery as an example, the capacity of one battery reaches 1200 mAh, which can reduce the trouble of frequent battery replacement in our daily life. At the same time, the graphene battery also has the characteristics of a wide temperature range, which can meet the needs of normal use in a special environment of minus 30 °C.
"In the future, the institute will focus on the application and development of graphene and its derived technologies in aerospace, domestic large aircraft, biomedicine, smart wear and other fields."