▎ 摘　　要

NOVELTY - Preparing graphene/flax composite fiber involves preparing complex enzyme refining agent which involves mixing pectinase, glucanase, cellulase, amylase and chelating agent i.e. ethylenediaminetetraacetic acid to obtain enzyme refining agent. The flax fiber is immersed in 10-20g/L chitosan aqueous solution at 55-65 degrees C for 1-3. The flax fiber is dipped in complex enzyme refining agent for 2-6 hours. The mixture is washed, dehydrated and dried to obtain modified flax fiber. The volume ratio of flax fiber to complex enzyme refining agent is 1g:10-50mL. USE - Method for preparing graphene/flax composite fiber (claimed). ADVANTAGE - The method enables to prepare graphene/flax composite fiber that has high intensity, high toughness, resistivity of 1014 ohm-meter and good impurity removing effect. DETAILED DESCRIPTION - Preparing graphene/flax composite fiber involves preparing complex enzyme refining agent which involves mixing pectinase, glucanase, cellulase, amylase and chelating agent i.e. ethylenediaminetetraacetic acid to obtain enzyme refining agent. The flax fiber is immersed in 10-20g/L chitosan aqueous solution at 55-65 degrees C for 1-3. The flax fiber is dipped in complex enzyme refining agent for 2-6 hours. The mixture is washed, dehydrated and dried to obtain modified flax fiber. The volume ratio of flax fiber to complex enzyme refining agent is 1g:10-50mL. The modified flax fiber is mixed with graphene fiber in mass ratio of 100:(1-10).