▎ 摘　　要

NOVELTY - A medical laser absorbing material is prepared by adding graphene with surfactant and ultra-pure water to prepare graphene solution, adding carbon nanotube with surfactant and ultra-pure water to prepare carbon nanotube solution, ultrasonically dispersing graphene solution and carbon nanotube solution, centrifuging carbon nanotube solution, pouring supernatant to obtain carbon nanotube slurry, adding black coating to prepare mixed coating, coating graphene on detector surface, drying, coating on surface of detector graphene using screen printing method and drying. USE - Method for preparing medical laser absorbing material (claimed). ADVANTAGE - The product has simple technology, reduces scattering, protects medical staff safety, and improves visible and near infrared wave band absorptivity of laser. DETAILED DESCRIPTION - A medical laser absorbing material is prepared by selecting graphene, carbon nanotube and black coating, adding graphene with surfactant and ultra-pure water to prepare graphene solution, adding carbon nanotube with surfactant and ultra-pure water to prepare carbon nanotube solution, ultrasonically dispersing graphene solution and carbon nanotube solution, centrifuging carbon nanotube solution, pouring supernatant to obtain carbon nanotube slurry, adding black coating to prepare mixed coating, coating graphene on detector surface by spraying at thickness of 5-10 mu m, drying into high temperature furnace, coating on surface of detector graphene using screen printing method at thickness of 20-30 mu m and drying into high temperature furnace. The graphene has purity of more than 95% and length of less than 10 mu m. The carbon nanotube is single-wall carbon nanotube or multi-wall carbon nanotube with purity of more than 90% and length of less than 10 mu m. The black coating is 3M black coating, EPC-2200 black coating or Martin black coating. The content of graphene and surfactant in graphene oxide solution is 100-120 g/L and 2.5 g/L, respectively. The content of carbon nanotube and surfactant in carbon nanotube solution is 60-80 g/L and 2 g/L, respectively.