Graphene is a material consisting of only a single atom thick layer of carbon arranged in a hexagonal lattice. It is a unique material with extraordinary properties, such as incredible strength, great electrical and thermal conductivity and high flexibility to mention a few. Adding graphene to composites can transfer these properties into new and improved materials with for example increased performance, better abrasion resistance, and conductive/antistatic properties.
Informational video about graphene starring one of the fathers of graphene Sir Konstantin Novoselov. The video is narrated in Danish and produced by DR.
Graphene is 200 times stronger than steel with a Young’s modulus and fracture strength of 1.0 TPa and 130 GPa, respectively, compared to steels Young’s modulus of 200 GPa and fracture strength of 585 MPa. These mechanical properties can be transferred to composites such as polymers or concrete. Pristine graphene is non-reactive and will agglomerate if it is not handled properly which will give no improvement to a composite.
A single layer of graphene only absorbs 2.3% of light making it almost completely transparent. This means that a thin layer on for example glass can produce transparent conductive glass surfaces which can give new opportunities in construction and architecture. With just a few layers of graphene it even gives UV protection to protect either the polymer material it is combined with from UV degradation or protect light sensitive components.
At Danish Graphene we produce functionalised graphene that is easily customised for your specific application and product. Our materials are produced with a unique method that allows us to incorporate various chemical handles on the graphene. This surface modification makes it easier to interact with the graphene. With a stronger interaction between the graphene and the surrounding material the properties of graphene are more effectively transferred and better composites are born.
The final graphene product can be produced as a dry material that is easy to mix with other materials or dispersed in solvents or masterbatch systems. The added functionalisation assists in dispersing the graphene as it increases the spacing between the flakes so they do not restack into graphite. Increased solubility and dispersibility are key to achieving the best performance.
We have access to equipment to mix the desired graphene material with other materials and will prepare the solution with the exact properties you are looking for. This includes custom functionalisation and analysis of the material which gives you a guarantee for the performance of the final product.
Choosing your graphene
It matters what material you are working with whether that is epoxies, polyurethanes or something completely different and what specific properties you desire. Whichever material you are working with we can create the graphene best suited for it.
When developing your new products and optimizing properties you might want to see if the properties of graphene could give your product an extra boost. But how do you choose the right graphene material? The graphene market can be difficult to navigate if you do not have pre-existing knowledge about the different types of graphene materials available.
You will need to look at your product and the application it is used for, are you interested in increased mechanical performance, increased electrical conductance or something else? How can the properties of graphene help improve your product? For increased mechanical performance you will require a good interaction between the graphene and the surrounding material of your product. To achieve this a graphene material with a high degree of functionalisation is well suited as it gives a high degree of dispersion of the graphene in your product and facilitates strong interactions. To increase this interaction to the fullest you need to have the right surface modification of the graphene that matches the chemical composition of your product.
If instead you are more interested in increasing electrical conductivity a low functionalisation is best as this keeps more of the graphene network intact for electron transport. For these applications a higher concentration of graphene is necessary, as you will need to have contact between the graphene flakes for electron transport, but with the functionalised material you get a better dispersion which decreases the likelihood of agglomeration.
No matter the application or the material you are working with we have the expertise to guide you through choosing the right type of graphene.