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- What is graphene?
Graphene, which is actually stripped from graphite, is a two-dimensional crystal made up of carbon atoms with only one layer of atomic thickness. The graphite used for pencil leads is equivalent to countless layers of graphene stacked on top of each other. Graphene, which sounds ordinary, has many unique properties. Popularly speaking, in nature at present, this thing is the thinnest and strongest material with excellent electrical conductivity, almost omnipotent in the industrial field. How thin is graphene? The thickness is only 1/100000 of that of ordinary paper. The surprise of graphene is much more than that.
The unfolded area of 1 gram of graphene is 2630 m2. Such a large specific surface area (the total surface area of 1 gram of solid) makes it super adsorptive. Although it is only one atom thick, graphene is a very tough material. Popularly speaking, it is harder than steel and diamonds. At the same time, it has good elasticity, and the stretching range can reach 20% of its own size. If you use a square meter of graphene to make a hammock, it weighs less than 1 milligram and can bear a weight of 1 kilogram.
Graphene has very low resistivity and electrons can move in it very efficiently, which makes graphene have very good electrical conductivity. If graphene is further combined with electronic components and electronic equipment, the power storage rate of power storage equipment can be enhanced and the power storage performance can be improved.
Graphene also has the zero permeability characteristic of “needle can not be inserted, water can not be splashed into”. If the hull is coated with graphene, it is like wearing an anticorrosive “armor”; in the event of a chemical fire, just a piece of graphene film can put out the fire.
- Graphene has come into daily life
With the development of scientific research, at present, graphene products begin to come into our daily life.
The new bulletproof vest developed with graphene characteristics can achieve or even exceed the bulletproof effect of traditional products with a bulletproof board of only 17 mm, and the weight can be reduced by 20%.
Making use of the good electrical conductivity, heat dissipation and material firmness of graphene, the company has developed a graphene static conductive tire, which is mainly used in special vehicles and vehicles equipped with flammable and explosive and other dangerous goods. These static conductive tires can avoid the static electricity caused by the friction between ordinary tires and the ground, so as to avoid the explosion of vehicles equipped with dangerous goods such as explosive materials.
Among the many applications of graphene, the most concerned and expected by the general public is the possibility of changing the function of electronic devices such as mobile phones. When smartphones first appeared, they would be hot when they talked and played games for a long time. Now this problem is basically solved. Because of the excellent thermal conductivity of graphene materials have been applied. In addition, taking advantage of graphene’s high flexibility and high sensitivity, technology companies have launched graphene pressure touch sensors, which are applied to intelligent mobile terminal electronic products. it can realize many functions such as multi-stage press induction, light press, tap by nail, shell vibration and so on.
Another highly anticipated contribution of graphene is to improve the performance of lithium batteries. To put it simply, the graphene composite conductive powder added to the lithium battery has the advantages of faster charging, larger capacity, and longer life. This is expected to allow mobile phones to charge quickly and electric cars to bid farewell to the embarrassment of a long time.
It is believed that in the future, graphene will be widely used in aerospace, weapons and equipment, major infrastructure, as well as new energy vehicles, energy-saving, and environmental protection, electronic information and other fields. The development of graphene film and graphene functional fiber wearable products also makes this new material better serve the public.