Aerogel fiber having specific cross-sectional morphological feature, graphene fiber and preparation method and device therefor

Abstract

An aerogel fiber having specific cross-sectional morphological feature, graphene fiber and a preparation method and device therefor are provided. The arrangement of the cross-sectional two-dimensional nanosheets of the aerogel fiber can be regulated. The regulation method includes: adding a rotating flow field device during wet spinning before the spinning fluid is sprayed out, the rotating flow field causes the two-dimensional nanosheets to form a specific sheet-like arrangement in the cross-sectional direction of the gel fiber under the action of rotating shear, and preparing a graphene oxide aerogel fiber with specific morphological structure (concentric or spiral) from the gel fiber having specific cross-sectional morphological structure under freeze-drying conditions. Further, drying and densifying, stretching and reducing the hydrogel fiber with the concentric circle structure are performed to obtain a graphene fiber with high modulus and high thermal conductivity.

Dependencies are inferred from the claim text.