▎ 摘　　要

NOVELTY - Concentrating big sheet graphene oxide solution involves passing graphene oxide solution at speed of 20-100 m/second through slit, flowing for 1-2 minutes, coagulating oxidized graphene, centrifuging in bag, and then dehydrating to obtain oxidized graphene coagulation, and concentrating. The cross section of the slit cross one dimension is not greater than 10um. The size of the oxidized graphene is greater 3 mm. USE - Method for concentrating big sheet graphene oxide solution. ADVANTAGE - The method enables to concentrate big sheet graphene oxide solution that has uniform shape structure and good dispersion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a concentrated system for big sheet graphene oxide solution, which comprises cutting device, and dewatering device, where cutting device is provided with slit section of the mold, and one-dimensional dimension of cross section of the slit is not greater than 10 mm.