Graphene is a new material that has recently attracted widespread attention, with unique physical, chemical, electrical and mechanical properties that hold promise for a wide range of applications in a variety of fields. However, there are still many challenges in the preparation and application of graphene, such as its tendency to aggregate and its difficulty in solubility with liquids such as water, which have seriously affected its application. The emergence of graphene aqueous dispersions has solved these problems and expanded the scope of graphene applications.

Graphene aqueous dispersion is a special treatment to coat the surface of graphene with a layer of surfactant, thus enabling it to form a stable dispersion system with liquids such as water. These aqueous dispersions can be used for a variety of applications without losing the special properties of graphene. In the following we will introduce several typical applications of graphene aqueous dispersions.

1、Application of graphene aqueous dispersions in the field of materials science

As a new type of material, graphene aqueous dispersions have been widely used in the field of materials science. Firstly, graphene aqueous dispersions can be used to prepare graphene composites. The use of graphene aqueous dispersions with other materials can produce composites with excellent properties. For example, mixing graphene aqueous dispersion with polymer materials can produce high performance materials with good wear resistance, hardness and modulus. Secondly, graphene aqueous dispersions can be used to prepare electrode materials. The graphene in graphene aqueous dispersion has high specific surface area and electrical conductivity, which can be used as electrode materials for electronic devices such as supercapacitors.

2、Application of graphene aqueous dispersion in the field of surface coating

Graphene aqueous dispersions can be used as additives for surface coatings, which can improve the performance of surface coatings. For example, adding graphene aqueous dispersions to polymer coatings can significantly improve the wear resistance and mechanical strength of the coatings. In addition, graphene aqueous dispersions can also be used to prepare conductive coatings and anti-corrosion coatings, etc.

3、Application of graphene aqueous dispersion in biomedical field

Graphene aqueous dispersions have good biocompatibility and biological activity, and can be used as new materials in the field of biomedicine. For example, graphene aqueous dispersions can prepare biosensors with good sensing properties, which can be used to detect tumour markers and other biomolecules. In addition, graphene aqueous dispersions can also be used as drug release control materials, which can regulate the release rate and time of drugs.

In conclusion, graphene aqueous dispersions, as a new type of material, have a wide range of application prospects. The properties and applications of graphene aqueous dispersions vary in different fields, but what they all have in common is the ability to exploit the unique properties of graphene and play an increasingly important role in applications in materials science, surface coatings, biomedicine and other fields. As the technology of graphene aqueous dispersions continues to develop and improve, it is believed that more and more extensive application scenarios will be developed.