石墨烯吸收红外光后引起其内部的晶格振荡而产生热量，并通过石墨烯构成的导

Graphene absorbs infrared light and causes its internal lattice to oscillate to generate heat, and through the thermal conductive network composed of graphene, the heat is transferred to the TPU matrix, which promotes the rapid heating of the composite film. When the temperature of G-TPU reaches the glass transition temperature, the TPU soft segment molecular chains undergo thermal motion and make the damaged parts contact each other under the action of gravity, wetting, diffusion and rearrangement occur to form new polymer molecular chains interpenetrating The internet. As the polymer temperature drops, the TPU gradually solidifies, allowing the microcracks to be repaired

Graphene absorbs infrared light and causes its internal lattice oscillation to generate heat. Through the heat conduction network composed of graphene, the heat is transferred to the TPU matrix to promote the rapid temperature rise of the composite film. When the g-tpu temperature reaches the glass transition temperature, the TPU soft segment molecular chain will undergo thermal movement and make the damaged parts contact with each other under the action of gravity, resulting in wetting, diffusion and rearrangement, so as to form a new polymer molecular chain interpenetrating network. With the decrease of polymer temperature, TPU solidifies gradually, and the microcracks are repaired

Graphene absorbs infrared light, which causes lattice oscillation inside it to generate heat, and through the heat conduction network formed by graphene, the heat is transferred to TPU matrix, which promotes the rapid temperature rise of the composite film. When the temperature of G-TPU reaches the glass transition temperature, the molecular chain of TPU soft segment moves thermally and the damaged parts contact with each other under the action of gravity, resulting in wetting, diffusion and rearrangement, thus forming a new interpenetrating network of polymer molecular chains. With the decrease of polymer temperature, TPU gradually solidifies, and the microcracks are repaired.