【Deep Coating Society Coating Technology】What are the applications of graphene in coatings?

Graphene has excellent properties on coatings:

Electrical properties: The carrier mobility of graphene at room temperature is about 15000cm2/(V·s), which is more than 10 times that of silicon materials and more than
twice that of indium antimonide (InSb), the substance with the highest known carrier mobility.
Under some specific conditions such as low temperatures, the carrier mobility of graphene can even be as high as 250000cm2/(V·s);

Thermal properties: Graphene has very good heat conductivity
.
The thermal conductivity of pure non-defect-free monolayer graphene is as high as 5300W/mK, which is the carbon material with the highest thermal conductivity so far, higher than that of single-walled carbon nanotubes (3500W/mK) and multi-walled carbon nanotubes (3000W/mK).

When it is used as a carrier, the thermal conductivity can also reach 600W/mK;

Mechanical properties: graphene is one of the strongest known materials, but also has good toughness, and can be bent, graphene theoretical Young's modulus of 1.
0TPa, inherent tensile strength of 130GPa
.
The reduced graphene modified by hydrogen plasma also has very good strength, with an average modulus of 0.
25TPa
.
Graphite paper composed of graphene flakes has many holes, so graphite paper appears brittle, however, functional graphene is obtained by oxidation, and then graphite paper made of functional graphene will be extremely strong and strong;

Optical properties: Graphene has very good optical properties, with an absorption rate of about 2.
3% in a wide wavelength range, and appears almost transparent
.
In the thickness range of several layers of graphene, the absorption rate increases by 2.
3%
for each additional layer of thickness.
Large-area graphene films also have excellent optical properties, and their optical properties change
with the change of graphene thickness.
This is an unusual low-energy electronic structure
of monolayer graphene.

Based on the excellent properties of graphene, graphene has become the focus
of a new generation of coatings.
Functional graphene with a large number of oxygen-containing groups, it has strong binding force with resin and polymer materials, and is suitable for reinforcing materials or functional materials
.
Graphene coatings have excellent
performance in anticorrosion, conductivity, antistatic and other fields.

Advantages of graphene coatings:

1.
Graphene anti-corrosion coating: the corrosion rate of nickel with multi-layer graphene coating is 20 times slower than that of bare nickel, while the corrosion rate of metal nickel with four-layer metal graphene coating is 4 times slower than that of bare nickel;

2.
Graphene thermal radiation heat dissipation coating: graphene can quickly radiate the heat on the surface of the object into the air in the form of thermal radiation, which accelerates the cooling speed of the object;

3.
Graphene conductive coating: graphene can better achieve the goal of conductive coatings due to its high electron mobility and excellent electrical properties;

4.
Graphene antistatic coating: graphene has the characteristics of high conductivity and strong mechanical properties, which is conducive to the preparation of high-performance and high-strength antistatic coatings
.

Source: Microcrystalline Material Science and Technology Statement: This number is neutral for reprinting, sharing, statements, and opinions, and the purpose is only for industry communication, and the copyright belongs to the original author
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