We produce thermal interface materials (TIM) based on graphene nanocomposites (based on graphene nanoflakes and polymers – epoxy resin, acrylic, PDMS, polyurethane and others) and hybrid graphene nanocomposites (metal microparticles, liquid metals, metal, ceramic and organic nanoparticles absorbed on graphene nanoflakes) (see table 6). The table shows TIM options with basic characteristics that are offered for purchase.
Table 6
| Parameters | Graphene (10%) + epoxy resin | Graphene (20%) + epoxy resin | Graphene (30%) + epoxy resin | Graphene (30%) + epoxy resin + metallic monospheres | Comments |
| Graphene purity | > 94% | > 94% | > 91% | > 91% | Batch control |
| Defects density | Low | Low | Low | Low | Primary control |
| Number of layers | 3 – 7 | 3 – 9 | 4 – 9 | 4 – 9 | Batch control |
| Content of Sp2 | > 82% | > 82% | – | – | Batch control |
| Thickness of graphene flakes (plates) | 2-3 nm | 2-3 nm | 3-4 nm | 3-4 nm | |
| Lateral size | to 50 μm | to 30 μm | to 60 μm | to 60 μm | |
| Electrical conductivity | (102-103) Ohm/m | (103-104) Ohm/m | (103-104) Ohm/m | (103-104) Ohm/m | |
| Thermal conductivity | 3,4-3,6 W/m·К | 4,2-4,6 W/m·К | 4,8-5,2 W/m·К | 5,8-6,6 W/m·К | |
| Optical transparency | Nontransparent | Nontransparent | Nontransparent | Nontransparent | |
| True density | 1,4–1,5g/cm3 | 1,23–1,28 g/cm3 | 1,4–1,5 g/cm3 | – | |
| Content of hybridized carbon | 0,2-5% | 0,2-5% | 0,2-5% | 0,5-5% | Primary control |
| Colour | Dark-grey | Dark-grey | Dark-grey | Dark-grey |