▎ 摘　　要

NOVELTY - Method for preparing oil-absorbing and wave-absorbing composite material using wood fiber powder, involves (a) adding deionized water to hydrophobic wood fiber powder, sealing the reactor, heating, hydrothermally treating, cooling, filtering, washing with water and freeze-drying, (b) adding pretreated carbon nanotubes and graphene oxide to ethanol, ultrasonically stirring, adding ferrous chloride, heating and stirring, dripping aqueous ammonia, continuously performing constant temperature stirring reaction, performing suction filtration, washing with water and drying, and (c) adding ethylene glycol to hydrothermally-treated oil-absorbing wood fiber powder, stirring and dispersing, adding ferric chloride, stirring and dissolving, adding sodium acetate, polyethylene glycol and magnetic modified carbon nanotube-graphene composite material, stirring, reacting in high-pressure reactor, cooling, performing magnetic separation, washing with distilled water and ethanol and vacuum drying. USE - Method for preparing oil-absorbing and wave-absorbing composite material using wood fiber powder. DETAILED DESCRIPTION - Method for preparing oil-absorbing and wave-absorbing composite material using wood fiber powder, involves (a) adding deionized water to 10-20 pts. wt. hydrophobic wood fiber powder in a ratio of 1:40, sealing the reaction kettle, heating at 165-175 degrees C, hydrothermally treating for 50-70 minutes, cooling, filtering, washing with water for 3-5 times, and freeze-drying to obtain the hydrothermally-treated oil-absorbing wood fiber powder, (b) adding 1-2 pts. wt. pretreated carbon nanotubes and 1-2 pts. wt. graphene oxide to 15-25 pts. wt. ethanol, ultrasonically stirring for 1-2 hours, adding 1-2 pts. wt. ferrous chloride and 1-2 pts. wt. ferric chloride, heating and stirring in an oil bath at 50-55 degrees C for 20-30 minutes, dripping aqueous ammonia to adjust the pH value to 10, continuously performing constant temperature stirring reaction for 1-2 hours, performing suction filtration, washing with water until to be neutral, and drying at 60-65 degrees C to obtain the magnetic modified carbon nanotube-graphene composite material, and (c) adding an ethylene glycol to obtained hydrothermally-treated oil-absorbing wood fiber powder, stirring and dispersing, adding 50-100 pts. wt. ferric chloride, stirring and dissolving, adding 135-270 pts. wt. sodium acetate, 37.5-75 pts. wt. polyethylene glycol and magnetic modified carbon nanotube-graphene composite material obtained in step (b), stirring for 30-40 minutes, reacting in a high-pressure reaction kettle at 200-210 degrees C for 1-2 hours, cooling, performing magnetic separation, washing with distilled water and ethanol for 3-5 times, and vacuum drying at 60-65 degrees C to obtain the composite material.