**4. Conclusions**

Graphene-based fillers have features such as relatively high mechanical properties. They are incorporated as fillers in polymeric materials such as elastomers nanocomposites due to their pronounced differences in properties. Several parameters such as processing conditions that affect these enhancements were highlighted. Morphologies of the corresponding nanocomposites were observed to be affected by processing. One of the major challenges concerning graphene is the industrial-scale production of inexpensive graphene-based nanocomposites. This would require newer processing techniques able to prepare low-thickness stacks with higher specific areas. A crucial aspect that we addressed is the better dispersion of graphene-based fillers in an elastomeric matrix. Covalent functionalization of graphene-based sheets proved to be indeed significant in the improvement of the interfacial filler dispersion and its exfoliation in the matrix. That is why other efforts should be made to exploit graphene-based fillers at the nanoscale by creating a nanostructural organization of graphene sheets that would ensure a lower percolation threshold and consequently more pronounced enhancement in reinforcement.
