▎ 摘　　要

NOVELTY - Composite conductive film comprises 80-100 pts. wt. microcrystalline cellulose, 20-30 pts. wt. graphene, 3-5 pts. wt. concentrated sulfuric acid, 3-5 pts. wt. concentrated hydrochloric acid, 1-3 pts. wt. sodium hydroxide, 5-10 pts. wt. urea, 15-20 pts. wt. tin dioxide-doped carbon nanotubes, 30-40 pts. wt. aniline, 0.1-1 pts. wt. diethanolamine, 0.1-0.2 pts. wt. ammonium persulfate, 500-800 pts. wt. silane coupling agent distilled water. USE - The composite conductive film is useful for touch display screen (claimed). ADVANTAGE - The composite conductive film: has excellent mechanical properties, high electrical conductivity and light transmittance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite conductive film comprising (1) diluting concentrated sulfuric acid with distilled water to certain concentration of sulfuric acid solution, adding microcrystalline cellulose, heating to 50-60 degrees C under mechanical stirring for 3-5 hours, natural cooling to room temperature, suction filtering, washing the product to neutrality, drying under reduced pressure, adding to distilled water to prepare a suspension with certain mass fraction, transferring the suspension into ultrasonic device with 400-800 W ultrasonic treatment for 10-15 minutes, vacuum filtering, and freeze-drying for 50-80 hours to obtain nano-microcrystalline cellulose; (2) diluting concentrated hydrochloric acid with distilled water to certain mass fraction of hydrochloric acid solution, adding aniline to the hydrochloric acid solution, stirring to dissolve, adding tin dioxide doped carbon nanotubes, carrying ultrasonic treatment at 400-800 W for 30-50 minutes to make suspension, slowly adding the prepared ammonium persulfate solution into the suspension under an ice bath, controlling the drop temperature at less than or equal to 5 degrees C, removing the ice bath after completing dropping, naturally cooling to room temperature for 3-6 hours, filtering with suction, washing with water, and vacuum drying to obtain polyaniline-coated tin dioxide-doped carbon nanotubes; (3) placing the polyaniline-coated tin dioxide-doped carbon nanotubes in tube furnace, heating to 200-250 degrees C at a certain speed, keeping the temperature for 3-5 hours under a nitrogen atmosphere, heating to 700-800 degrees C for two times at certain speed and maintaining the temperature constant for 1-2 hours, and naturally cooling to room temperature; (4) mixing the sodium hydroxide, urea, diethanolamine, and distilled water to make a uniform solution; treating the polyaniline-coated tin dioxide-doped carbon nanotubes with silane coupling agent, adding to the above solution, adding nano-microcrystalline cellulose and graphene, carrying ultrasonic treatment on mixed solution at 800-1000 W for 5-10 minutes to obtain composite film solution; and (5) fixing the glass substrate on the center plate of the homogenizer, adding the composite film droplet onto the glass substrate, stopping the rotation of the homogenizer, allowing to stand for 2-5 minutes, removing the glass substrate, placing it in an oven at 40-50 degrees C, and drying at low temperature for 10-15 hours, and carefully removing the film.