Graphene/organic fiber in-situ reinforced urea formaldehyde foam material and preparation method thereof

The invention discloses a graphene/organic fiber in-situ reinforced urea formaldehyde foam material and a preparation method thereof. The method is characterized by: adding 0.05-20 parts of graphene and 0.05-5 parts of a coupling agent into a formaldehyde aqueous solution, conducting ultrasonic dispersion at 25-90DEG C for 0.5-2h, then adjusting the pH value of the system to 7.8-8.5, adding a first batch of urea, carrying out reaction at 70-85DEG C for 0.5-2h, then immediately using a formic acid solution to adjust the pH value of the system to 4.5-5.2, further carrying out reaction until atomization phenomenon occurs to the reaction system, adding a second batch of urea and carrying out reaction for 0.5-2h, then adjusting the pH value of the system to 7-9, adding a third batch of urea, carrying out reaction for 5-30min, then performing blanking to obtain a graphene modified UF resin liquid; adding 0.05-20 parts of organic fiber and 1-10 parts of a surfactant, performing high speed stirring for 1-5min, then a