▎ 摘　　要

NOVELTY - Preparation method of graphene/polyimide water-permeable mulch film comprises (S1) using carbon dioxide laser to irradiate the surface of polyimide film for instantaneous high temperature treatment to generate graphene layer, and using the laser to simultaneously create micropores in a composite film composed of graphene layer and polyimide film, and (S2) spin-coating polyamic acid on the surface of the obtained composite film, performing imidization reaction, and irradiating the surface of the reacted film with carbon dioxide laser for a second time to obtain the graphene/polyimide water-permeable mulch film. USE - The method is used for preparing a graphene/polyimide water-permeable mulch film (claimed). ADVANTAGE - The method is simple, easy to implement, and beneficial for large-scale industrial production, improves the light absorption performance of the water-permeable mulch, endows full-spectrum absorption capacity of the water-permeable mulch, and realizes efficient light-to-heat conversion. The graphene material prepared at the instantaneous high temperature of the carbon dioxide laser irradiation reduces the production cost while preparing graphene quickly and with high quality. The graphene has strong light absorption ability in a wide range of solar spectrum from ultraviolet to near infrared light, which converts photon energy into thermal energy and produces photothermal effect.