▎ 摘　　要

NOVELTY - Preparation of polyurethane modified graphene conductive coating includes mixing 0.5-2 g graphene oxide in deionized water, performing ultrasonic treatment for 1-5 hours with ultrasonic power of 200 W, ultrasonic frequency of 400 KHz and ultrasonic temperature of 20-50 degrees C, adding 5-40 g reducing agent, heating at 40-100 degrees C for 0.5-8 hours, dispersing, centrifuging, taking supernatant liquid, drying and pulverizing to obtain partially reduced graphene oxide, weighing 0.01-0.5 g reduced graphene oxide, and mixing with 100 mL dimethylformamide. USE - Method for preparing polyurethane modified graphene conductive coating used for coating leather, textile, wood or metal surface (claimed). ADVANTAGE - The polyurethane modified graphene conductive coating is waterproof, and has good electromagnetic shielding property. DETAILED DESCRIPTION - Preparation of polyurethane modified graphene conductive coating involves mixing 0.5-2 g graphene oxide in deionized water, performing ultrasonic treatment for 1-5 hours with ultrasonic power of 200 W, ultrasonic frequency of 400 KHz and ultrasonic temperature of 20-50 degrees C, adding 5-40 g reducing agent, heating at 40-100 degrees C for 0.5-8 hours, dispersing, centrifuging, taking supernatant liquid, drying and pulverizing to obtain partially reduced graphene oxide, weighing 0.01-0.5 g reduced graphene oxide, mixing with 100 mL dimethylformamide, performing ultrasonic dispersion at 20-100 degrees C, adding 5-50 g isocyanate under nitrogen gas, stirring for 2 hours, filtering, oven drying to obtain modified isocyanate, weighing 0.05-5 g modified isocyanate, dispersing in N,N-dimethylformamide, performing ultrasonic dispersion, adding 10-50 g binary alcohol and 0.5-3 g dimethylolpropionic acid, reacting for 1 hour under nitrogen gas, raising temperature to 70-90 degrees C, adding 5-25 g isocyanate, reacting for 1 hour, adding mixture of dilaurate tributyltin and triethylenediamine at mass ratio of 1:2, and 0.03-0.5 g composite catalyst, reacting for 2 hours, cooling to 40 degrees C, adding 1-4 g triethylamine, reacting for 0.5 hours, adding deionized water to neutralize pH of solution, adding 0.1-2 g ethylene diamine, reacting for 0.5 hour, and concentrating under reduced pressure.