▎ 摘　　要

NOVELTY - A composite nanomaterial hybrid membrane preparing method involves dispersing nanocellulose crystals in water to obtain a nanocellulose crystal dispersion. A graphene oxide is dispersed in water to obtain a graphene oxide dispersion. The nanocellulose crystal dispersion and the graphene oxide dispersion are mixed to form a mixed dispersion. The base film is treated with a hydrophilic treatment liquid and the mixed dispersion is coated on the treated base film to form a functional layer. The post-treatment and drying of the functional layer are performed to obtain the composite nano material hybrid film. USE - Method for preparing a composite nanomaterial hybrid membrane. ADVANTAGE - The method enables preparing hybrid membrane with high efficiency, ensuring that the process is suitable for industrial scale-up production, the post-treatment process is simple and efficient, controlling the pore size, adapting to different application scenarios, enhancing the mechanical properties of the membrane material itself and improving the stability of the membrane under strong cross-flow and long-term operation.