▎ 摘　　要

NOVELTY - A water-retaining graphene-nano cellulose crosslinking material is prepared by drying graphite, adding toluene and silane coupling agent KH550 mixed solution, stirring and heating, reacting, washing, filtering, oven drying, suspending in dimethyl sulfoxide and deionized water mixed solution, magnetic stirring, filtering, and grinding; and crushing straw, adding sodium hydroxide solution, boiling, adding ethanol to dilute, adding cellulase, degrading, slowly heating, adding sodium hydroxide neutralized acrylic acid and calcium superphosphate, reacting, and adding N,N-methylene bis acrylamide. USE - Method for preparing water-retaining graphene-nano cellulose crosslinking material (claimed). ADVANTAGE - The method is safe, has simple preparation process and coating material with protection and isolation function, avoids graphene material agglomeration, and meets environment-friendly requirement. DETAILED DESCRIPTION - A water-retaining graphene-nano cellulose crosslinking material is prepared by: (A) drying 20-30 pts. wt. graphite, adding toluene and 1-2 pts. wt. silane coupling agent KH550 mixed solution, stirring and heating to 120-125 degrees C, reacting for 15-20 hours, washing using toluene, filtering for 3 times, oven drying at 120-130 degrees C, suspending in dimethyl sulfoxide and deionized water mixed solution, magnetic stirring at room temperature for 24-72 hours, filtering at 60-70 degrees C for 24-48 hours, and grinding to obtain graphene/dimethyl sulfoxide intercalation complex; (B) crushing 20-30 pts. wt. straw, adding 10-15 pts. wt. sodium hydroxide solution, boiling for 30-40 minutes, adding ethanol to dilute to neutral, adding 0.5-1 pt. wt. cellulase, degrading at 40-55 degrees C for 1-2 days, slowly heating under nitrogen protection to 70-80 degrees C, adding 5-10 pts. wt. sodium hydroxide neutralized acrylic acid and 0.5-1 pt. wt. calcium superphosphate, reacting for 1-2 hours, and adding 1.5-2 pts. wt. N,N-methylene bis acrylamide; and (C) oil bath heating to 35-55 degrees C, adding graphene/dimethyl sulfoxide intercalation complex, maintaining temperature for 40-50 minutes, adding 5-10 pts. wt. nano silicon dioxide, continuously heating for 4-6 hours, entering into electronic accelerator to irradiate at 20-220 kGy, and drying at low temperature.