▎ 摘　　要

NOVELTY - A chitosan functionalized graphene oxide/polyester composite fiber is prepared by adding graphene oxide suspension to a centrifuge tube, placing the centrifuge tube in an ultrasonic system, ultrasonically dispersing graphene oxide suspension, adding chitosan solution, stirring, immersing pre-washed and dried polyester fiber in the obtained mixed solution, reacting at 50-90 degrees C for more than 6 hours in a water bath, naturally drying the immersed fiber, and storing. The mass ratio of graphene oxide, chitosan, polyester fiber and water is 1:1:3-4:1100-1300. USE - Chitosan functionalized graphene oxide/polyester composite fiber is used for adsorbing formaldehyde in indoor air (claimed). ADVANTAGE - The chitosan functionalized graphene oxide/polyester composite fiber has high stability, absorbs formaldehyde in indoor air at high temperature, and is prepared by simple process.