▎ 摘　　要

NOVELTY - Preparing organic polymer involves grafting modified polylactic acid anti-bacterial agent and graphene, where the graft modified polylactic acid is prepared by 1, 3-propylene diamine grafted to polylactic acid side chain the chemical structural formula (I), the immobilized antibacterial agent is prepared by coating allicin and enzyme in the composite cage- shaped structure prepared by chitosan and citric acid the solid loading amount is 3-7wt.%. USE - Method for preparing new organic polymer technique. ADVANTAGE - The method has good anti-bacterial, hydrophilicity, biological compatibility and degradable performance. It can prolong the shelf life of food and other materials, after using, the packaging material can be completely degraded into carbon dioxide and water, it does not pollute the environment, and it has wide application prospect. DETAILED DESCRIPTION - Preparing organic polymer involves grafting modified polylactic acid anti-bacterial agent and graphene, where the graft modified polylactic acid is prepared by 1 3-propylene diamine grafted to polylactic acid side chain the chemical structural formula is represented by formula (I), n=500- 1000 The immobilized antibacterial agent is prepared by coating allicin and enzyme in the composite cage- shaped structure prepared by chitosan and citric acid the solid loading amount is 3-7 wt.%. An INDEPENDENT CLAIM is included for the method for preparing new organic polymer technique, which involves: 1. dispersing the 2-5 pts. wt. immobilized antibacterial agent, 1-3 pts. wt. oxide graphene in the water; 2. adding 50-70 pts. wt. graft modified polylactic acid, raising the temperature to 60-80℃, stirring and reacting for 2-4 hours to obtain the mixed solution; 3. transferring the mixed solution to the film-forming device at 50-90℃ to dry the film.