Tetrahydropyrazolopyridines as antifriction and antiwear agents: experimental and DFT calculations

Abstract

MWD in the presence of PO and its admixture with THPP-OMe.

Amino Borate-Functionalized Reduced Graphene Oxide Further Functionalized with Copper Phthalocyanine Nanotubes for Reducing Friction and Wear

“…A lubricant is imposed between the rubbing surfaces to curb the menace of friction and wear. Antiwear and antifriction additives are blended with the base lubricant for promoting lubrication. − These additives are generally conventional organic compounds − or nanomaterials. − Nanomaterials, mainly inorganic nanoparticles, nanosheets, − and carbon-based materials, − are well-acknowledged in the field of tribology because their fast action at the interface increases the efficiency and their high chemical stability reduces emissions. Carbon-based materials, including graphene, − fullerenes, carbon nanotubes (CNTs), and carbon spheres, , are considered to be of paramount significance for reducing friction and wear.…”

“…It is well-known from the papers published in this area that adsorption of the additive has a dominating effect on the tribological activity. − , The importance of Pc ligands triggered us to carry out a detailed classical molecular dynamics (MD) investigation of the adsorption of Pc and CuPc on the steel surface in paraffin oil (PO). Classical MD simulations are capable of investigating the molecular aspects of adsorption of Pc and CuPc to the iron surface in the presence of PO molecules. − The MD investigation predicted that CuPc adsorbs better than Pc on the steel surface and also has a tendency to flip between folded and unfolded conformations.…”