▎ 摘　　要

NOVELTY - Lubricant additive comprises spherical hollow structure spherical shell is a composite layer of graphene oxide layer and polydopamine layer from inside to outside, or the polydopamine layer from inside to outside, graphene layer, the structure of the polydopamine layer composite layer, the number of composite layers is single layer or multiple layers, the multi-layer structure is composed of many composite layers repeatedly stacked. USE - The super-lubricating water lubricant is useful in the mechanical component. ADVANTAGE - The super-lubricating water lubricant has ultra-smooth lubricating behavior and anti-wear performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing lubricating additive comprising (1) mixing the dopamine hydrochloride solution, water, and tris solution, adding the HCl solution, and adding the nano alumina colloidal aqueous solution to react to obtain the polydopamine-coated spherical nano-alumina composite material, (2) adding the obtained polydopamine-coated spherical nano-alumina composite material to the graphene oxide solution, and reacting to obtain graphene oxide/ Polypamine/Al2O3 composite material, or, (3) using graphene oxide/polypamine/Al2O3 composite material obtained in step 2) is sequentially repeated in step (1) and mixing with dopamine hydrochloride, water, Tris solution, and HCl solution, carrying out reaction with graphene oxide to obtain multilayer graphene oxide/polypamine/Al2O3 composite material, (4) single-layer graphene oxide/polypamine/Al2O3 composite material or multilayer oxidation graphene/polypamine/Al2O3 composite material and mixing with the HCl solution and etching to obtain a hollow spherical lubricating additive; preferably, the reacted mixture in step (3) is separated by centrifugation, removing supernatant and freeze-drying to obtain a multilayer graphene oxide/polypamine/Al2O3 composite material, preferably, the reacted mixture in step (4) is separated by centrifugation, removing supernatant and lubricating additive is obtained by freeze drying, preferably, participating in step (3) the volume ratio and addition amount of the reacted dopamine hydrochloride, water, Tris solution, and HCl solution are the same as step (1), and the addition amount and concentration of the graphene oxide solution participating in the reaction are the same as step (2); and #super water sliding lubricant comprising water and the lubricating additive, preferably, the mass concentration of the lubricating additive in the super water sliding lubricant is 0.01-0.8%; preferably 0.01-0.5%; more preferably 0.2%.