▎ 摘　　要

NOVELTY - Application of polyethylene glycol-modified graphene oxide is claimed as specific trypsin activating agent and stabilizer. The polyethylene glycol-modified graphene oxide is obtained by grafting polyvinylpyrrolidone on surface of graphite alkene oxide group of polyethylene glycol, and connecting graphene oxide with polyethylene glycol using amide bond. The precursor of the polyethylene glycol is branched polyethylene glycol with molecular weight of 9000-11000. The weight of the polyethylene glycol is 35-45 wt.%. The graphene oxide has size of 10-30 nm and height of 1-2 nm. USE - The polyethylene glycol-modified graphene oxide is useful as specific trypsin activating agent and stabilizer (claimed). ADVANTAGE - The product can be prepared simply, has excellent thermal stability, and meets requirements of biological medicine.