New materials are ubiquitous in our daily lives, ranging from aeronautics and astronautics to our daily lives, including smart homes and electronic products. New materials are really changing our way of life.

First, we must grow high-quality two-dimensional graphene materials to minimize defects and improve the uniformity of the number of layers. Secondly, consider whether the structural unit matching adopts a sheet structure, a tubular structure or a rod structure, and the connection method of the structural unit should be considered to optimize the connection strength and the number of connections. It is necessary to consider introducing a suitable aperture structure according to the actual application. In order to further improve the mechanical strength and conductivity of three-dimensional graphene, the researchers used chemical vapor deposition technology to prepare three-dimensional graphene. Graphene was grown directly on the surface of the porous template under high temperature conditions, and the template was removed and freeze-dried to prepare three-dimensional graphene. The graphene prepared by this method has super-light and super-elastic properties, flexible microstructure control, large-scale preparation, and excellent mechanical and electrical properties.

What are the magical properties of three-dimensional graphene?

First of all, it is ultra-lightweight. This is an ultra-light three-dimensional graphene aerogel developed by Zhejiang University. It is the world's lightest material so far, setting the Guinness record for light materials in the world. Its density is only 0.16mg/cm?, the porosity is very high, and 99.99% is air.

Secondly, this material has high elasticity, can be compressed to 5% or less of its original size, and can still return to its original shape after 1000 cycles. In addition, the material has high strength, the compression modulus can reach more than 100 MPa, the material strength is 200 times larger than the steel of the same weight, the mechanical strength is better than all aerogel materials, and it also has good mechanical stability. Three-dimensional graphene is also a good conductor. It has the highest conductivity among all carbon-based aerogels. It is connected to the LED lamp and the brightness of the LED lamp can be flexibly adjusted by compression.

Three-dimensional graphene has a rich micro-nano structure and shows excellent superhydrophobic properties. Small water droplets can roll freely on its surface without entering its interior. This feature makes the three-dimensional graphene self-cleaning function, which can make the underwater oil droplets carry out directional transportation and collection, and realize oil-water separation

A severe outbreak of new crown pneumonia occurred this year. Masks have become a line of defense to protect medical staff and once became a shortage of resources. Three-dimensional graphene has a large specific surface area and strong electrostatic adsorption characteristics, which can be used as a key filter material to improve filtration efficiency. Nowadays, we can buy graphene masks on the market, which have played an important role in the fight against the epidemic.

In addition, three-dimensional graphene can also be used as structural materials, sound insulation materials and thermal insulation materials. First, its ultra-light and strong structure can reduce the weight of future spacecraft by 40%, realizing energy saving and emission reduction. In addition, three-dimensional graphene has large porosity, extremely low thermal conductivity and thermal conductivity, and can be used in various forms of insulation materials. Three-dimensional graphene also has low sound velocity characteristics and can be used as an ideal acoustic delay and high-temperature sound insulation material. Therefore, three-dimensional graphene can be used in aviation, aerospace, navigation and other fields.