▎ 摘　　要

NOVELTY - Preparation of lubricating oil additive based on modified graphene material comprises preparing graphene solution into graphene alcohol solution using alcohol solvent comprising 60 wt.% n-butanol and 40 wt.% isopropanol, dissolving bile acid salt or its derivative in graphene alcohol solution at 1:100-50000 mass ratio, and obtaining the product. USE - Preparation of vehicle lubricating oil additive based on modified graphene material (claimed). ADVANTAGE - The method is simple and easy and suitable for industrial large-scale production, has high repetition rate, and provides lubricating oil additive, which has reduced cost and good dispersibility, and increases friction resistance of lubricating oil. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparation of lubricating oil based on modified graphene material comprising mixing the lubricating oil additive based on modified graphene material with lubricating oil to form two-phase, raising the temperature to 50 degrees C in an environment less than the atmospheric pressure, reacting for 3-6 hours under vigorous stirring and obtaining the product; (2) lubricating oil additive based on modified graphene material; and (3) lubricating oil based on modified graphene material.