What is Graphene oxide?
Graphene oxide (graphene oxide) is the oxide of graphene. It is generally represented by GO, and its color is brown-yellow. The common products on the market are powder, flake and solution. After being oxidized, the oxygen-containing functional groups on it increase and make the properties more active than graphene, and its properties can be improved through various reactions with oxygen-containing functional groups.
Graphene oxide flakes are the product of graphite powder after chemical oxidation and exfoliation. Graphene oxide is a single atomic layer that can be expanded to tens of microns in lateral size at any time. Therefore, its structure crosses the typical scales of general chemistry and materials science. Graphene oxide can be regarded as an unconventional type of soft material, with the characteristics of polymers, colloids, films, and amphiphilic molecules. Graphene oxide has long been regarded as a hydrophilic substance because of its superior dispersibility in water. However, relevant experimental results show that graphene oxide is actually amphiphilic, showing hydrophilicity from the edge to the center of the graphene sheet To hydrophobic property distribution. Therefore, graphene oxide can exist at the interface like a surfactant, and reduce the energy between the interfaces. Its hydrophilicity is widely recognized.
The application of Graphene oxide:
As an important class of graphene-based materials, although the oxidation process destroys the highly conjugated structure of graphene, it still maintains special surface properties and layered structure. The introduction of oxygen-containing groups not only makes graphene oxide chemically stable, but also provides surface modification active sites and a larger specific surface area for the synthesis of graphene-based/graphene oxide-based materials. Graphene oxide, as a precursor and support carrier for the synthesis of graphene-based composite materials, is easy to functionalize and has high controllability. In the process of compounding with metals, metal oxides, high molecular polymers and other materials, it can provide a large specific surface area to effectively disperse the attached materials and prevent agglomeration.
Graphene oxide also shows its own excellent physical, chemical, optical, and electrical properties, and due to the coexistence of various oxygen-containing functional groups on the base and edges of the graphene sheet framework, graphene oxide can be controlled by The type and number of oxygen-containing functional groups are used to modulate its conductivity and band gap. The material has a wide range of applications. Graphene oxide is a new type of carbon material with excellent performance, with a high specific surface area and abundant surface functional groups. Graphene oxide composite materials, including polymer composite materials and inorganic compound materials, have a wide range of applications, so the surface modification of graphene oxide has become another research focus.
Due to the excellent characteristics of Graphene oxide in electrical, thermal and mechanical properties, it is widely used in the field of semiconductor electronic packaging.
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