▎ 摘　　要

NOVELTY - Preparing super-heat conducting graphene composite film with ultra-high-strength comprises: (i) mixing nano graphene and bridging carbon-based liquid or powder in a mixer in presence of nitrogen at room temperature; (ii) absorbing the mixed material in a heating box by a vacuum pump and starting electric heating after completely feeding; (iii) film forming; (iv) scanning and thermally bridging comprising scanning the composite film by laser beam, electronic beam or ion beam, carbonizing, graphitizing, and crystallizing, and combining the nano graphene molecule and bridging carbon. USE - The method is useful for preparing a super-heat conducting graphene composite film with ultra-high-strength. ADVANTAGE - The method has simple and compact steps, and it has high efficient productivity by using a single continuous device. DETAILED DESCRIPTION - Preparing super-heat conducting graphene composite film with ultra-high-strength comprises: (i) mixing nano graphene (10-80 wt.%) and bridging carbon-based liquid or powder (20-90 wt.%) in a mixer in presence of nitrogen for 1-10 minutes at room temperature; (ii) heating, absorbing the mixed material in a heating box by a vacuum pump and starting electric heating after completely feeding, where the heating is carried out at 100-500 degrees C for 1-20 hours; (iii) forming film, adding the mixed material into a fabric zone from discharge hole of a heating box, uniformly spreading the material by a fabric roller and a scraper, feeding the mixture in a pre-pressing roller, controlling the pressure at 1-10 atmospheres, rolling the uniformly spread material, pressing the graphite carbon base material by the press roller, then transferring it to the final pressing roller, pressing the mixture to obtain a composite film thinner than 0.1 mm; (iv) scanning and thermally bridging by transferring the composite film to the scanning area by a pressing roller, gradually scanning the composite film by laser beam, electronic beam or ion beam till the scanned part is at higher than 3000 degrees C, carbonizing, graphitizing and crystallizing, combining the molecular frame of the graphene with the bridging carbon base, combining the nano graphene molecule and bridging carbon base to obtain super-conducting heat-conducting ultra-high-strength graphene composite film; and (v) rolling the composite film by a rolling device, mounting a photoelectric correcting device on the rolling device to ensure the levelness of the end surface.