About xGnP
Physical Structure and Properties
xGnP is a platelet consisting of several sheets of graphene with an overall thickness of approximately 5 nanometers (ranging from 1 nm to 15nm) and particle diameters that can range from sub-micron to 100+ microns.
Density: ~2.0g/cm 3
Chemical Composition: Graphene
Electrical Resistivity: ~ 50 x 10-6 Ω cm
Thermal Conductivity: 3000 W/m K
Tensile Modulus: ~1.0 TPa
Tensile Strength: ~10-20 GPa
Click here to download the MSDS.
CLICK HERE TO DOWNLOAD A TECHNICAL PRESENTATION ABOUT OUR PRODUCTS FROM DR. LAWRENCE DRZAL
Properties in Application
Electrical Conductivity
In various laboratories around the world, graphene has been found to be extremely conductive of electricity. xGnP has been found to have a percolation threshold of 1.9 wt% or better in a control thermoplastic matrix. At densities of 2 % to 5 wt%, conductivity reaches sufficient levels to provide ESD, RFI or EMI shielding. When combined with carbon fibers, cross-fiber conductivities can be achieved to promote large-surface ESD or RFI/EMI shielding. xGnP can also be combined with glass fibers or other matrix materials to provide sufficient conductivity for electrostatic painting or other applications requiring electrical conductivity..
Click here for a chart comparing xGnP electrical resistivity with other carbon materials.
Thermal Conductivity
xGnP has been found to significantly outperform most other forms of carbon when used at densities of 20 wt% in control resins. At these densities, of course, xGnP also confers significant electrical conductivity as well as improved mechanical properties to most thermoplastic, thermoset, or elastomeric systems. At lesser densities, xGnP adds thermal stability to a variety of matrix materials.
Click here for a chart comparing xGnP thermal conductivity to other carbon materials.
Mechanical Properties
As opposed to materials like carbon black, xGnP improves mechanical properties of most composites, particularly stiffness and tensile strength. Elastomeric compounds have been shown to experience increased life and reduced surface wear when reinforced with xGnP.
Click here for a chart comparing xGnP mechanical properties with other carbon materials.
Click here for a chart comparing xGnP mechanical properties with other nanocomposite reinforcements.
Barrier Properties
Because of the platelet shape, xGnP significantly improves the impermeability of composites when used at densities of ~3 wt% or greater. xGnP particles can be aligned using an e-field, although no special alignment has been found necessary when used in most extrusion systems. Because xGnP also imparts electrical conductivity for ESD at these densities, the resulting composites offer attractive cost savings for applications like fuel lines or fuel tank linings.
Click here for a chart showing xGnP permeability comparisons in a Nylon 6 matrix.
Note: the properties and measurements provided on this page are shown for comparison purposes only. The actual performance of xGnP in a composite application will, of course, depend on matrix materials, processing, densities, and dispersion of the materials. In some cases, surface treatments or other functionalization can significantly improve results. For more information or for detailed recommendations regarding your application, please contact our research scientists.