▎ 摘　　要

NOVELTY - Preparing a graphene oxide-nanocellulose micro-nano hierarchical structure epoxy resin composite material involves dispersing graphene oxide and nano cellulose in an aqueous solution of hydrochloric acid having a pH of 4-6, and then adding ethylenediamine (EDA), 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC HCl) and N-hydroxysuccinimide (NHS) Stir at room temperature for 1-3 days, after the reaction is completed. The distilled water is centrifuged to neutrality, and freeze-dried to obtain a graphene oxide-nanocellulose powder. The obtained graphene oxide-nanocellulose powder is dispersed in the second step into acetone (dispersion concentration is 0.5 milligram per milliliter), slowly added epoxy resin while stirring magnetically, stirred uniformly, and then recovered acetone by rotary evaporation. USE - Method for preparing graphene oxide-nanocellulose micro-nano hierarchical structure epoxy resin composite material in low temperature environment. ADVANTAGE - The method enabls to prepare a graphene oxide-nanocellulose micro-nano hierarchical structure epoxy resin composite material is significantly improves temperature toughness of the composite material, it is easy to generate micro-crack. DETAILED DESCRIPTION - Preparing a graphene oxide-nanocellulose micro-nano hierarchical structure epoxy resin composite material in a low temperature environment, involves dispersing graphene oxide and nano cellulose in an aqueous solution of hydrochloric acid having a pH of 4-6, and then adding ethylenediamine (EDA), 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC HCl) and N-hydroxysuccinimide (NHS) Stir at room temperature for 1-3 days, after the reaction is completed. The distilled water is centrifuged to neutrality, and freeze-dried to obtain a graphene oxide-nanocellulose powder. The obtained graphene oxide-nanocellulose powder is dispersed in the second step into acetone (dispersion concentration is 0.5 milligram per milliliter), slowly added epoxy resin while stirring magnetically, stirred uniformly, and then recovered acetone by rotary evaporation. The residual acetone is completely removed under vacuum, a curing agent is added, and the mixture is heated and solidified to obtain a graphene oxide-nanocellulose micro-nano-layered epoxy resin composite material.