▎ 摘　　要

NOVELTY - High-strength graphene oxide composite fiber for preventing neutron radiation comprises aramid nano fibers, surface-treated boron carbide and zinc borate in a mass ratio of 1-40:0-10:0-50:18, is claimed. The spinning solution is dissolved and prepared, and then obtained by wet spinning. USE - The fiber is useful for preventing neutron radiation (claimed). ADVANTAGE - The fiber has good mechanical property and flame resistance property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the fiber, comprising (i) adding aramid fiber into potassium hydroxide and dimethyl sulfoxide solution, stirring until evenly mixed, adding ultrapure water, stirring until the gel appears, and suction filtering, washing to obtain aramid nano fibers, (ii) surface treating of boron carbide and/or zinc borate, and (iii) centrifugally concentrating the aqueous graphene oxide solution prepared by the Hummers method at a high speed, and then adding aramid nano fibers, surface treated boron carbide and/or zinc borate, stirring into a uniform spinning solution in a closed environment, and then performing wet spinning to obtain a high-strength graphene oxide composite fiber, where the mass ratio of the aramid nano fiber, the surface treated boron carbide and zinc borate, and the graphene oxide is 1-40:0-10:0-50:1.