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Graphene is a new type of nanomaterial with the thinnest, the strongest, and the best electrical and thermal conductivity ever discovered by humans.
It is known as "black gold" and "the king of new materials"
.
Graphene is super hard, 200 times harder than the best steel, yet thin enough to stand on a rose petal; it is very elastic and can stretch up to 20% of its size; its electronic It has a very high mobility, 100 times that of silicon; it has a high thermal conductivity, 10 times that of copper; it is almost completely transparent, absorbing only 2.
3% of light; its structure is so dense that even the smallest gas atoms (Hydrogen atoms) are also impenetrable; it has the largest surface area, 4 grams can cover a football field.
.
.
Because of these high-quality optical, electrical and mechanical properties, graphene has a wide range of applications
.
The unique two-dimensional structure of graphene makes it very sensitive to the surrounding environment.
It is used in chemical sensors, and the sensitivity can be compared with the limit of single-molecule detection.
It is an ideal material for electrochemical biosensors
.
In addition, graphene materials also have outstanding advantages in flexible display screens, photosensitive elements, new energy batteries, seawater desalination filters, hydrogen storage materials, and aerospace and military applications
.
"Graphene + fiber" is powerful
"Graphene + fiber" is powerfulGraphene, a magical material, can not only be used in high-tech fields such as aerospace, but also in human daily clothing
.
The thermal conductivity of graphene is as high as 5300 W/m·degree, which is higher than that of carbon nanotubes and diamond.
It has very good thermal conductivity, and its electron mobility at room temperature exceeds that of carbon nanotubes and silicon crystals, while the resistivity is only about 10-8 Ohm meter, the material with the smallest resistivity in the world
.
In addition, graphene has many attractive optical properties
.
In recent years, some enterprises and research institutions have cooperated to develop biomass graphene viscose fiber spinning technology by using these optical properties of graphene, and produced biomass graphene composite fibers, biomass graphene inner warm pore materials and graphite.
Inner warm fleece material,
etc.
Widespread application will take time
Widespread application will take timeAt the 2017 CCTV Spring Festival Gala, a magical high-tech clothing made a wonderful appearance
.
At that time, on the open-air skating performance venue at minus 30 ℃ in the Harbin branch, a group of actors wearing light one-piece suits danced gracefully
.
This performance costume is made of graphene material
.
It takes advantage of the thin and light appearance of graphene and the outstanding advantages of fast charging to release heat and store thermal energy, which well achieves the effect of cold resistance and warmth
.
According to the person in charge of Zhiene Technology Company, which developed the product, this special clothing can quickly heat up to about 40 °C in 30 seconds, and the constant temperature can last for 3 to 5 hours
.
Now that two years have passed, has graphene thermal clothing come off the stage to the homes of ordinary people? Industry insiders said that it will take time for graphene to be widely used in clothing
.
In the view of academics, the production of graphene materials and the research and development of technology have not yet fully entered the stage of industrialized production, and there are very few real graphene products
.
Several industry insiders who produce graphene fabrics said that graphene is indeed currently being developed and applied to clothing fabrics, but it is still mostly used in sports and outdoor clothing.
distance
.
Experts said that the thermal insulation effect of graphene is beyond doubt, but there are still relatively few manufacturers in the market who really master the manufacturing technology of graphene fabrics
.
On the one hand, the manufacturing cost of graphene is very high.
For thermal pants with a general sales price of 180 yuan, how much graphene content can be imagined; on the other hand, even if it is a real graphene fabric, compared with Cashmere or many chemical fiber materials have similar thermal insulation effects, whether consumers are willing to pay for their high prices
.
"The use of graphene is gradually expanding, but the speed is not as fast as imagined, because a new technology may generally take 5 to 10 years, or even longer, to truly penetrate into our production and life
.
" National Colloidal Materials Engineering Technology Research Experts from the center said
.
Despite the high expectations for graphene to enter daily life, the road to industrialization is still long and bumpy
.
At least it can be said responsibly that the "graphene" thermal pants that are currently on the market for tens of dollars are not as "beautiful" as advertised
.
After the frost, the cold air hits cards everywhere
.
All kinds of cold-proof and warm clothing appeared, one of which is called "mobile constant temperature quilt", and graphene warm pants that can light bulbs and promote blood circulation are eye-catching
.
What kind of high-tech material is graphene, and are the thermal pants added with graphene really as magical as the merchants advertise?
