▎ 摘　　要

NOVELTY - A graphene-based high infrared emission electrothermal film preparing method involves coating graphene conductive paste on the surface of a supporting substrate, and forming an initial conductive coating. The initial conductive coating is densified to obtain a treated dense conductive coating. The graphene conductive paste is added with inorganic or organic filler to obtain graphene slurry. The slurry is coated on the surface of the densified conductive coating and dried, followed by roughing to form composite heating layer having high infrared emission rate to obtain the finished product. USE - Method for preparing graphene-based high infrared emission electrothermal film. ADVANTAGE - The method enables preparing graphene-based high infrared emission electrothermal film with reduced internal porosity, increased thermal conductivity, reduced heat transmission loss by surface-rough coating, enhanced infrared emissivity and improved radiant heat transfer ratio. DETAILED DESCRIPTION - A graphene-based high infrared emission electrothermal film preparing method involves coating graphene conductive paste on the surface of a supporting substrate, and forming an initial conductive coating by stepwise heating and drying. The initial conductive coating is densified to obtain a treated dense conductive coating. The graphene conductive paste is added with inorganic or organic filler and mixed to obtain modified graphene slurry. The modified graphene slurry is coated on the surface of the densified conductive coating using a spraying method and dried to obtain a rough surface coating, followed by roughing densified conductive coating to form composite heating layer having high infrared emission rate to obtain the finished product. An INDEPENDENT CLAIM is also included for a graphene-based high infrared emission electrothermal film prepared by the method.