Synthesis of super magnetic lipophilic graphene

Friction and wear are the two major reasons for energy and material losses in mechanical processes. Lubrication is a principal issue to improve energy efficiency and mechanical durability1. Although graphene oxide (GO) is naturally hydrophilic, there are some ways to effectively adjust the characteristic of GO from hydrophilicity to super-hydrophobicity by grafting long chain alkanes on the GO surface2. As a promising and manipulable precursor, GO sheets provide active sites for chemical functionalization through hydroxyl, carbonyl, epoxy, and phenol functional groups attached onto the basal plane and along sheet edges3,4. In this work, in a typical experiment, GO was prepared by acid oxidation of graphite powder according to the modified Hummers method. we used the GO as an efficient oxidizing reagent to oxidize Fe2+ from FeCl2 to form Fe3O4/rGO via the spontaneous in situ deposition of Fe3O4 nanoparticles onto the self-reduced GO surface. Then lipophilic magnetic graphene was synthesized.

Keywords:

Graphene , Magnetic , Lipophile , Lamellar structure , Friction and wear , 2D Materials