Green synthesis of 2D graphene nanocomposite for eco-friendly lubricants

Important results from the project

The graphene nanosheets will have a lamellar structure without folds and wrinkles, and the Mn3O4 nanoparticles are not only uniformly anchored on the graphene surfaces but also intercalated in the layers of the graphene nanosheets, i.e., the graphene-based nanocomposite shows a new sandwich-like nanostructure. The sandwich-like nanocomposite additives can realize the “slideroll” lubricating effects during boundary lubrication regime, meaning they will generate superior tribological properties in contrast to previous works.

Expected long term effects

This project produces an in situ, green synthesis of graphene-based nanocomposites by recovering the GO impurities from Mn2+ ions as precursor to Mn3O4 nanoparticles without any other reducing agents or additional precursors. Our proposed mechanochemical method does not use chemical solvents, and the reaction is relatively safe, clean and highly efficient. This project develops new graphene-based lubricants with significant tribological properties under extreme temperatures, which favors the practical applications of machine industries in northern Sweden.

Approach and implementation

In this project, a mechanochemical method is proposed to modify graphene nanocomposite and for the nanocomposite-based lubricant, it can be produced in the same creation pot, i.e. one-pot processing. Mechanochemistry, also known as mechanical ball milling, is the use of mechanical energy to induce chemical reactions and surface modification. Next, the lubricants will be added in the same pot and can be fully mixed with graphene additives via the mechanical ball milling process.