▎ 摘　　要

NOVELTY - Processing of polyurethane foam involves (i) adding wood flour, glucose solution, water, and biogas slurry to a fermentation kettle, performing mixed fermentation, performing carbonization and cooling to obtain pretreated wood flour, (ii) adding graphene oxide, oleic acid and water to beaker, placing in an ultrasonic disperser and adding aqueous ammonia to obtain a mixed treatment solution, (iii) adding mixed treatment solution, pretreated wood flour, cellulase and water to a flask and performing steam treatment to obtain modified graphene oxide, (iv) mixing ethylene carbonate, triethanolamine, biomass raw materials and wood pulp to obtain a biomass liquefaction product, (v) adding chitosan, water and chitosanase into a beaker and heating to obtain an enzymatic chitosan solution, and (vi) adding biomass liquefaction product, isocyanate, water, catalyst and enzymatic chitosan solution in a flask, mixing, heating, injecting the obtained mixed slurry into a mold and demolding. USE - Processing of polyurethane foam used for fireproof and thermal insulation boards. ADVANTAGE - The method enables processing of polyurethane foam with mechanical and thermal insulation properties. DETAILED DESCRIPTION - Processing of polyurethane foam involves (i) adding 30 pts. wt. wood flour, 2 pts. wt. glucose solution, 60 pts. wt. water, 0.2 pt. wt. biogas slurry, and 8 pts. wt. ferric nitrate solution to a fermentation kettle at a temperature of 35 degrees C, performing mixed fermentation for 5 days, adding 10% ferric nitrate solution to the fermentation kettle, stirring for 60 minutes at a speed of 800 rpm, adding 30% sodium hydroxide solution to kettle to adjust the pH to 8.6, filtering to obtain a filter residue, washing the obtained filter residue with deionized water, placing the washed filter residue in an oven and drying to a constant weight at a temperature of 110 degrees C, placing the obtained dry filter residue in a carbonization furnace, filling the furnace with nitrogen at a rate of 90 mL/minute, performing carbonization for 3 hours and cooling to room temperature to obtain pretreated wood flour, (ii) adding 10 pts. wt. graphene oxide, 2 pts. wt. oleic acid and 40 pts. wt. water to beaker, placing in an ultrasonic disperser at an ultrasonic frequency of 75 kHz for 60 minutes and adding 30% aqueous ammonia to the beaker to adjust the pH to 10.3 to obtain a mixed treatment solution, (iii) adding 30 pts. wt. mixed treatment solution, 20 pts. wt. pretreated wood flour, 0.02 pt. wt. cellulase, 0.02 pt. wt. ligninase and 30 pts. wt. water to a single-necked flask, placing the flask in a digital speed measuring thermostat magnetic stirrer at a temperature of 35 degrees C, heating for 60 minutes and performing high-temperature and high-pressure steam treatment the dry pretreated graphene oxide in an oven and drying to a constant weight at a temperature of 110 degrees C to obtain modified graphene oxide, (iv) mixing 80 pts. wt. ethylene carbonate, 0.5 pt. wt. triethanolamine, 8 pts. wt. biomass raw materials and 8 pts. wt. wood pulp at a temperature of 220 degrees C and 600 rpm for 5 hours to obtain a biomass liquefaction product, (v) adding 3 pts. wt. chitosan, 120 pts. wt. water and 0.02 pts. wt. chitosanase into a beaker, stirring with a glass rod for 20 minutes, swelling for 5 hours, cooling to 30 degrees C and heating to 95 degrees C to obtain an enzymatic chitosan solution, and (vi) adding 50 pts. wt. biomass liquefaction product, 70 pts. wt. toluene diisocyanate as isocyanate, 30 pts. wt. water, 3 pts. wt. triethylenediamine, 0.5 pt. wt. silicone oil, 0.08 pt. wt. stannous octoate as a catalyst, 20 pts. wt. enzymatic chitosan solution, 0.2 pt. wt. castor oil, 8 pt. wt. isoamyl acetate and 20 pt. wt. modified graphene oxide into a four-necked flask, mixing for 60 minutes at a speed of 900 rpm, heating for 60 minutes to obtain a mixed slurry, injecting the obtained mixed slurry into a mold and demolding.