▎ 摘　　要

NOVELTY - Preparation of nano-titanium dioxide and nitrogen-boron-doped graphene compound lubricating oil additive involves dispersing graphene oxide into ethanol solution under ultrasonic bath, boric acid and ammonia, reacting, cooling, washing, drying, dispersing nano-titanium dioxide and nitrogen-boron-graphene into ethanol at 50-60 degrees C under ultrasound for 1-2 hours to obtain nitrogen-boron-graphene ethanol solution, mixing 2 obtained solutions at 60-70 degrees C for 1-3 hours, filtering, and microwave drying at 40-60 degrees C for 3-5 minutes to obtain product. USE - Method for preparing nano-titanium dioxide and nitrogen-boron-doped graphene compound lubricating oil additive. ADVANTAGE - The prepared additive has self-lubricating effect, rolling effect, anti-wear resistant, and can protect engine. DETAILED DESCRIPTION - Preparation of nano-titanium dioxide and nitrogen-boron-doped graphene compound lubricating oil additive comprises dispersing graphene oxide into ethanol solution under ultrasonic bath, boric acid and ammonia, reacting at 60-70 degrees C for 8-12 hours, cooling at room temperature, washing, drying at 80-100 degrees C, reducing reaction under microwave environment for 3-5 minutes to obtain nitrogen-boron-graphene; and dispersing nano-titanium dioxide into ethanol at 50-60 degrees C for 1-2 hours, dispersing nitrogen-boron-graphene into ethanol at 50-60 degrees C under ultrasound for 1-2 hours to obtain nitrogen-boron-graphene ethanol solution, mixing 2 obtained solutions at 60-70 degrees C for 1-3 hours, filtering, and microwave drying at 40-60 degrees C for 3-5 minutes to obtain product.