▎ 摘　　要

NOVELTY - Preparing nano-silver modified graphene fiber comprises e.g. (i) dispersing graphene oxide in deionized water to prepare graphene oxide spinning liquid; (ii) extruding the spinning liquid of graphene oxide prepared in the step (i) through spinning pipe having diameter of 5-5000 mu , length of 0.5-100 cm into coagulation bath for 5-3600 seconds to obtain oxidized graphene colloid fiber; (iii) adding oxidized graphene colloid fiber obtained in step (ii) into silver ammonia solution, reducing agent, reducing silver ion to nano silver particles at 10-90 degrees C for 5-180 minutes and cleaning. USE - The method is useful for preparing nano-silver modified graphene fiber (claimed). ADVANTAGE - The nano-silver modified graphene fiber is firm, has good mechanical performance and good electrical performance. DETAILED DESCRIPTION - Preparing nano-silver modified graphene fiber comprises (i) dispersing graphene oxide in deionized water to prepare graphene oxide spinning liquid; (ii) extruding the spinning liquid of graphene oxide prepared in the step (i) through spinning pipe having diameter of 5-5000 mu , length of 0.5-100 cm into coagulation bath for 5-3600 seconds to obtain oxidized graphene colloid fiber; (iii) adding oxidized graphene colloid fiber obtained in step (ii) into silver ammonia solution, reducing agent, reducing silver ion to nano silver particles at 10-90 degrees C for 5-180 minutes, cleaning to obtain fiber surface with nano silver-modified graphene colloid fiber; (iv) drying nano silver-modified graphene colloid fiber prepared in the step (iii) at 40-100 degrees C to obtain solid graphite fiber and reducing nano silver-modified graphene colloid fiber in mixed atmosphere of inert gas or inert gas and hydrogen at a temperature of 500-900 degrees C, where graphene oxide is oxidized at the outlet of the spinning tube, the velocity of liquid along the axial direction of spinning tube is 0.1-100 ml/minute, and speed along spinning tube is 0.01-200 ml/minute.