Macroscopic superlubricity of potassium hydroxide solution achieved by incorporating in-situ released graphene from friction pairs

Abstract Graphene (G), as a typical two-dimensional material, is often used an additive for liquid lubricants. However, graphene mostly added to lubricants in one-time manner friction; it mainly exists the form of multilayer agglomerated structures due ??? stacking between sheets, making unable fully exert synergistic lubrication function. Herein, we propose new macroscopic superlubric system graphene/potassium hydroxide (G/KOH) solution; and involved exfoliated in-situ from graphene/epoxy (G/EP) friction pair by friction, continuously providing freshly-peeled into KOH solution minimizing adverse effects agglomeration. Moreover, produced has thinner thickness better anti-aggregation ability, which provide more accommodate OH ? , stacked sandwich /graphene/OH pairs (i.e., equivalent moving pulley block with wheels), finally realize superlubricity. This study develops suitable alkaline environments, at same time proposes way gradually release additives situ rather than adding them all once, deepening understanding superlubricity mechanism, paving experimental foundation practical application