Method for producing conductive graphene fibers having thermal stability and conductive graphene fibers produced thereby

摘要

The present invention relates to a method for producing a conductive graphene fiber having thermal stability and to a conductive graphene fiber produced by the method. The present invention, a first step of preparing a spinning solution containing a plurality of graphene oxide; A second step of preparing graphene oxide fibers by wet spinning the spinning solution in a coagulation bath containing an acid solution not containing a metal cation as a coagulant; A third step of producing a conductive graphene fiber by reducing the graphene oxide fiber by heat treatment; the graphene oxide includes an oxygen-containing functional group that is an epoxy group or a hydroxyl group on the surface, but a lactol group or a carboxyl group High heat-resistant graphene oxide showing thermal stability because oxygen-containing functional groups do not exist on the surface, and graphene oxide fibers are formed by hydrogen bonding of epoxy groups or hydroxyl groups on the surface of graphene oxide by an acid solution to form a large number of graphene oxides. It is manufactured by being solidified while connected, and the heat treatment is a method for manufacturing a conductive graphene fiber having thermal stability, characterized in that it is carried out in an air atmosphere in a temperature range showing the thermal stability of high heat-resistant graphene oxide, and the method produced by the method Conductive graphene fiber as a technical gist.