Abstract:

In order to better realize the application of graphene fibers in function textile area, the graphene oxides fiber were prepared by wet-spinning method using graphene oxides solution as spinning dope and calcium chloride solution with different content as coagulation bath. The graphene fibers were obtained by chemical reduction of the as-prepared graphene oxides fibers in the aqueous solution of hydroiodic acid. The oxidation degree and structure morphology of graphene oxides were characterized by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM), which indicated that the carbon and oxygen atom value of graphene oxides was 1:1, and graphene oxides showed thin and crumpled morphology. The influence of tensile strength was researched by CaCl2 coagulation bath with different mass fraction. The graphene fibers derived from 20% CaCl2 coagulation bath, exhibited high electrical conductivity of 180 S/ cm and good tensile strength of 892 MPa.

Key words: graphene fibers, wet-spinning, coagulation bath, conductivity, tensile strength