▎ 摘　　要

NOVELTY - Preparing helical structured graphene-carbon nanotube composite fiber, comprises e.g. (i) preparing graphene oxide aqueous solution, (ii) preparing carbon nanometer thin film, (iii) immersing carbon nanotube films in graphene oxide aqueous solution, then mixing carbon nanotube film and graphene oxide solution to obtain graphene oxide-carbon nanotube mixed film, (iv) drying and cutting the mixed film to obtain graphene oxide-carbon nanotube composite film (A), cutting the composite film (A) into strips, wetting, then twisting into helical structured fiber, and carrying out chemical reduction. USE - The method is useful for preparing helical structured graphene-carbon nanotube composite fiber (claimed). ADVANTAGE - The method: solves the problem that the graphene carbon nanotube composite fiber is not evenly mixed in the existing methods and difficult to achieve large scale industrial production. The carbon nanotube fiber: has unique structure; can be stretched within the elastic stretchable range of the fiber, resistance changes regularly with the change of the deformation. DETAILED DESCRIPTION - Preparing helical structured graphene-carbon nanotube composite fiber, comprises (i) preparing graphene oxide aqueous solution using chemical oxidation method, (ii) preparing carbon nanometer thin film using chemical vapor deposition method, (iii) collecting carbon nanotube films using spinning wheels, then immersing wheels in graphene oxide aqueous solution, then mixing carbon nanotube film and graphene oxide solution, and collecting from collecting wheel to obtain graphene oxide-carbon nanotube mixed film, (iv) air-drying naturally the mixed film and cutting from the collecting wheel to obtain graphene oxide-carbon nanotube composite film (A), cutting the composite film (A) into strips, fixing horizontally the strip, where one end of the strip is fixed on the motor and the other end is fixed to road, wetting the strip using water vapor, then twisting the strip into helical structured fiber by motor, and carrying out chemical reduction to obtain final product.