Accelerating Macroscale Superlubricity through Carbon Quantum Dots on Engineering Steel Surfaces

• DOI: 10.1002/adfm.202310880
• Publication Date: 2023-11-21T23:07:56Z
• Authors: Changhe Du; Tao Yang; Tongtong Yu; Liqiang Zhang; Xudong Sui; Yange Feng; Xiaobo Wang; Daoai Wang
• Keywords: Carbon fibers; Surface Engineering

Abstract Macroscale superlubricity on engineering steel surfaces offers a promising solution for minimizing friction and wear in applications. However, achieving typically requires long running‐in period, which may result significant the pair. Herein, new lubricant with superlubricating properties is rationally designed by using polyethylene glycol (PEG) critic acid (CA) under complexing effect period of about 800 s. Importantly, introduction carbon quantum dots (CQDs) obtained from pyrolysis CA into PEG aqueous shortens macroscale ( µ ≈ 0.005) between steel/steel contact to 44 The corresponding rate (1.15 × 10 −7 mm 3 N −1 m ) disk reduced 77% due shorter time. Furthermore, surface analysis combined molecular dynamics simulations demonstrates that CQDs easily adsorb pair, forming film reduces interaction energy molecules substrate. This work provides insights lubrication mechanism contributes design liquid superlubricants short periods low rates surfaces.