▎ 摘　　要

NOVELTY - Three dimensional printing slurry comprises 10-20 wt.% gelatin derivative, 0.99-3.45 wt.% graphene oxide, 4-30 wt.% conductive particles, 2-10 wt.% photoinitiator, and 60-90 wt.% water. USE - The three dimensional printing slurry is useful for fast sintering of a powder in a photosensitive resin to form paste/slurry. ADVANTAGE - The slurry: disperses graphene oxide in methacrylic anhydride gelatin; avoids the use of photosensitive resin; can form a large number of pore structures after curing and separate water vapor and other gaseous components quickly; and has high sintering efficacy and good formability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: Preparing three dimensional printing slurry, comprising (i) taking gelatin, adding it into phosphate buffer solution, heating it in a constant temperature water bath at 50℃, stirring and dissolving evenly to obtain a 10% gelatin solution, adding 6% methacrylic anhydride into the above gelatin solution at a rate of 0.5ml/min and stirring continuously to obtain a methacrylic anhydride gelatin solution; (ii) dissolving 2 g graphene oxide and 1 g conductive particles in 97g of methacrylic anhydride gelatin by means of ultrasonic vibration dispersion or mechanical ball milling, and stirring the mixture evenly to obtain solution A; (iii) adding the above solution A into a dialysis bag at 70℃, replacing the deionized water for every 4-6 hours, and dialyzing in deionized water for 7 days; (iv) transferring the dialysis solution into a glass dish, sealing it with (Plastic paraffin film), freezing it in a refrigerator at 80℃, transferring into freeze-drying machine to freeze-dry and form white porous foam, and preserving in ultra-low temperature refrigerator; and (v) mixing the above-mentioned white porous foam with water at a ratio of 10-20%, ball milling uniformly, vacuumizing and stirring to eliminate air bubbles, add 2/1000 photoinitiator and dispersing evenly; andParafilm Preparing a graphene chip comprises (1) Designing the print model through computer-aided design software, using two-dimensional slicing software to preprocess the print model file and slicing it to obtain the st1 file; (2) importing the st 1 file into the digital light processing additive manufacturing printer, and adding the three dimensional printing slurry, coating the three dimensional printing slurry and solidifying layer by layer to prepare a graphene chip with a designed functional shape; and (3) freezing the graphene chip for 0.5-1 hour, placing it in a microwave sintering furnace, heating rapidly to remove the moisture in the graphene chip, and sintering.