First, we develop a system that can achieve macroscopic superslip in two typical acid-base environments, and achieve superslip in both solid-liquid coupling and pure liquid-body solution conditions. The details are as follows:

(1) A new macroscopic superlubrication system of graphene/potassium hydroxide (G/KOH) solution is proposed; The graphene additives involved are removed from the graphene/epoxy resin (G/EP) friction pair in place by friction, continuously providing newly stripped graphene to the KOH solution and minimizing the adverse effects of graphene agglomeration. In addition, the graphene additive prepared in situ has thinner thickness and better aggregation resistance, thus providing more graphene to hold OH- and forming more OH-/ graphene /OH- stacked sandwich structures between friction pairs (i.e., the equivalent of a moving block with more wheels), Finally, super lubrication (μ=0.0045) is achieved. The research has been published in Friction (2023, 11(4), 567-579), a TOP engineering journal.

(2) High concentration zinc chloride aqueous solution was used as lubricant to achieve macroscopic superslip (μ=0.002). The effects of the number of cluster configurations on the tribological properties of lubricants were also revealed.

Sceond, new liquid superlubricity systems were constructed based on cholinyl-based ionic liquids, and the source of superlubricity was analyzed from the molecular/atomic level by combining experimental and molecular dynamics simulation methods. The details are as follows:

(1) Based on choline chloride/magnesium chloride hexahydrate ionic liquid, a water-regulated ionic liquid (ILA/H2O) super lubrication system was constructed. Strong hydrogen bonding in ionic liquids is weakened by the introduction of 2-10 wt % water, thus enabling macroscopic super-lubrication at ~700 MPa Hertz contact pressure (0.006< μ< 0.008). And it can be used in a variety of materials friction pairs (e.g., steel/steel, steel /SiO2, Si3N4/Al2O3 and Si3N4/SiO2) to obtain very low friction (μ< 0.01).

(2) Another super lubrication system was constructed based on the water-regulated choline chloride/D-glucose ionic liquid (ChCl/Glu-H2O). The lubrication material maintains tribological properties comparable to ILA/H2O (0.003< μ< 0.007, the maximum Hertz contact pressure is ~700 MPa), and at the same time, the tolerance to ambient humidity is improved, and it is more environmentally friendly. It also has the potential to be widely used in a variety of scenarios.

Third, based on the asymmetric contact between non-equal diameter particles, two kinds of high bearing solid additive/lubricating fluid (oil) super lubrication systems were constructed. The details are as follows:

(1)The additive /ILA (Uneq-SA/ILA) super lubrication system is formed by mixing two polymer PMMA pellets of different sizes as additives with ion-like liquid (ILA). Ultra-lubricated (μ as low as 0.0046) on silicon nitride (Si3N4)/quartz glass friction pairs is achieved and bearing capacity can be up to 568 MPa.

(2) With high-hardness inorganic compound SiO2 nanoparticles as additive and castor oil (CO) as the base solution, the Uneq-SA/CO lubrication system was constructed. The super-lubrication (μ≈ 0.008) was achieved on the friction pair of GCr15 steel /SKH55 high-speed steel, and the load was up to 637 MPa.