▎ 摘　　要

NOVELTY - Degradable polylactic acid plastic comprises polylactic acid resin and modified poly(2-acrylamido-2-methyl-1-propanesulfonic acid). The modified poly(2-acrylamido-2-methyl-1-propanesulfonic acid) comprises poly(2-acrylamido-2-methyl-1-propanesulfonic acid) grafted on the surface of the graphene oxide and sepiolite. The D50 of the graphene oxide is 80-120 nm. The D50 of the sepiolite is 5-35 µm. USE - The plastic is useful in tissue engineering support in biomedical field and medicine carrier. ADVANTAGE - The plastic is stable and dispersed, can keep stable performance, can obtain faster degradation speed than pure poly lactic acid resin in the degradation process, and the product after degradation has no secondary pollution to the environment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the plastic, comprising mixing and ball milling the graphene oxide and sepiolite in a mass ratio of 1:5-1:8 to get the grinding material, mixing 2-acrylamido-2-methyl-1-propanesulfonic acid monomer and water according to the quality ratio of 1:8-1:10, mixing and stirring to dissolve, adding alkaline liquid and adjusting the neutrality of 2-acrylamido-2-methyl-1-propanesulfonic acid to 50-60%, adding 10-15% 2-acrylamido-2-methyl-1-propanesulfonic acid quality of the ball grinding material, adding 0.3-0.5% 2-acrylamide-2-methylopenulfonic acid of N,N-methylenebisacrylamide after the dispersing, adding 0.6-0.8% 2-acrylamide-2-methylopenulfonic acid of initiator, filtering after heating polymerization reactions, drying to obtain modified poly(2-acrylamido-2-methyl-1-propanesulfonic acid), where in the polylactic acid resin, the mass of polylactic acid resin is 10-12% according to the addition, adding modified poly(2-acrylamido-2-methyl-1-propanesulfonic acid), uniformly mixing, and injection molding to get the product.