Multilayer Graphene Nanofabrication Equipment from Graphite Compound

The project "Research on technology and equipment for manufacturing semi-industrial scale graphene materials (pilot)", code: UDPTCN 04/20-22 chaired by Institute of Physics, Vietnam Academy of Science and Technology, has scientific significance, high applicability and practicality and is rated "Excellent" by the Acceptance Council.

Graphene nanomaterials are being considered one of the materials with the potential to bring high efficiency in many applications; they not only have the properties of nanomaterials but also have characteristic properties that many other materials can hardly obtain such as:  Mechanical, physical, chemical, thermal strength; Electrical conductivity, high thermal conductivity and low toxicity. Graphene is being considered as a new material of the future, it can replace silicon semiconductors as a substrate material in the industry of manufacturing transistors, electronic components, energy batteries, rechargeable batteries, supercapacitors with large capacity, fast charging speed, at the same time has a compact weight and size. When mixed into plastic materials, graphene can turn them into conductors of electricity while making them more heat resistant, resistant to chemical environments, and mechanically stronger.

To make single-layered graphene structures with a large 2D area is still a challenge in terms of quality and cost. Meanwhile, expanded graphene (multilayer) is made from graphite with low cost, not too complicated technology, allowing them to be applied in many fields of life, quickly bringing high economic efficiency, meeting the needs of application development of our country today. Figure 1 is the technological process and equipment for fabricating graphene materials from GIC particles (Graphite Intercalation Compounds) proposed by the research team to fabricate bulk multilayer graphene materials from pilot-scale graphite compounds.

Figure 1. Process flowchart and equipment for multilayer graphene fabrication from GIC particles

The research team successfully designed and manufactured a multi-layer graphene fabrication equipment system from GIC particles with a capacity of 01kg/day, an automatic, stable and continuous working equipment system. The equipment system has a complete structure including parts: Feed system, reaction chamber, product collection and sorting unit, and electronic components controlling the process of feeding, transporting materials and controlling the reaction chamber temperature. With the above research results, the research team was granted a patent by the National Office of Intellectual Property on "Method and equipment for fabricating multilayer graphene nanofoil from graphite compounds" No. 34682 on December 13, 2022.

Figure 2. Patent image and multilayer graphene product

The physical properties and microscopic properties of graphene materials obtained using the mission's fabrication equipment were evaluated through measurements: DO oil adsorption, volume expansion degree and SEM scanning electron microscopy.

Figure 3. Image of 01gram of multilayer graphene occupying a volume of 300 ml and SEM measurement image

The obtained multilayer graphene products are initially considered for application orientation in different purposes such as: Environmental cleaning materials (adsorption, recovery of oil and industrial wastes in the aquatic environment), polymer nanocomposite materials, electrostatic charge dissipation, rubber denaturation reinforcement materials and many other applications.


Translated by Phuong Ha
Link to Vietnamese version

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