▎ 摘　　要

NOVELTY - Preparing graphene oxide material comprises soaking graphene oxide fiber in the ammonium salt solution for 1-10 seconds, stretching rate is 20-30%, continuously stretching for 3-5 seconds, maintaining graphene oxide layer arranged straight, drying to obtain wrinkle-removing graphene oxide fiber, where the concentration of ammonium salt is 1-10 mM, and the solvent of ammonium salt solution is water, acetic acid, ethyl acetate, ethanol, methanol, isopropanol, ethylene glycol, propylene glycol, glycerol, triethylene glycol, tetraethylene glycol, pentaethylene glycol or other mixed solvent. USE - The method is useful for preparing graphene oxide material. ADVANTAGE - The method has excellent performance of high modulus and high toughness, and has wide application prospect.