▎ 摘　　要

NOVELTY - Preparation of composite film involves providing a prefabricated graphene oxide dispersion and modified carbon nanotube dispersion, mixing and stirring the graphene oxide dispersion liquid and the modified carbon nanotube dispersion liquid in a predetermined ratio to obtain a graphene oxide/carbon nanotube composite material, spraying the graphene oxide/carbon nanotube composite material onto the inner wall of a heated and rotating silicon tube to synthesize a graphene oxide/carbon nanotube film, using deionized water and ethanol to clean the graphene oxide/carbon nanotube film, immersing in water, peeling off the silicon tube to obtain a composite film after completely cooling, depositing the composite film on a polydimethylsiloxane substrate, and reducing the composite film by a femtosecond laser. The reduced composite film is stretched step by step along a predetermined direction to obtain a partially reduced graphene oxide/carbon nanotube composite film. USE - Preparation method of composite film used in electronic device (all claimed) e.g. mobile phone, personal digital assistant (PDA), portable multimedia player (PMP), digital camera, digital camcorder, digital video camera (DVC), digital photo frame, personal computer (PC), portable game machine, portable information terminal, electronic book (e-book) reader, portable telephone, portable game console, portable music player, portable video camera, portable DVD player, mobile medical device, etc. ADVANTAGE - The method improves the dispersibility of the graphene oxide, building a complete internal network structure, and improving the laser reduction efficiency, and the film uniformity.