▎ 摘　　要

NOVELTY - Preparation of foamed film-based composite antibacterial nanomaterial involves preparing copper oxide/graphene oxide composite nanomaterial modified polylactic acid by dripping dichloromethane solution of polylactic acid into acetone dispersion of copper oxide/graphene oxide composite nanomaterial, ultrasonically processing, adding 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccinimide, reacting and drying, blending starch, nucleating agent and N-methylpyrrolidone to obtain premix (A), mixing 80-150 pts. wt. copper oxide/graphene oxide composite nanomaterial modified polylactic acid and 2-10 pts. wt. plasticizer, melt blending to obtain premix (B), mixing the premixes (A) and (B) and adding to twin-screw extruder for extrusion granulation to obtain modified polylactic acid particles, passing modified polylactic acid particles to two-stage twin-screw extruder, injecting gas foaming agent into twin-screw extruder at rate of 5-10 L/hour and extruding. USE - Preparation of foamed film-based composite antibacterial nanomaterial (claimed). ADVANTAGE - The prepared foamed film-based composite antibacterial nanomaterial has excellent anticorrosive property. DETAILED DESCRIPTION - Preparation of foamed film-based composite antibacterial nanomaterial involves preparing copper oxide/graphene oxide composite nanomaterial modified polylactic acid by dripping 20-100 mg/mL dichloromethane solution of polylactic acid into 3-10 mg/mL acetone dispersion of copper oxide/graphene oxide composite nanomaterial, stirring at 350-600 rpm, ultrasonically processing under water bath condition, adding 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccinimide in protective gas atmosphere, reacting at 60-80 degrees C under stirring condition for 4-8 hours and drying, melt blending 15-40 pts. wt. starch, 0.2-2 pts. wt. nucleating agent and 10-30 pts. wt. N-methylpyrrolidone at 135-150 degrees C for 10-30 minutes to obtain premix (A), mixing 80-150 pts. wt. copper oxide/graphene oxide composite nanomaterial modified polylactic acid and 2-10 pts. wt. plasticizer, melt blending at 145-165 degrees C for 10-30 minutes to obtain premix (B), mixing the premixes (A) and (B) and adding to twin-screw extruder for extrusion granulation to obtain modified polylactic acid particles, passing modified polylactic acid particles to two-stage twin-screw extruder, injecting gas foaming agent into twin-screw extruder at rate of 5-10 L/hour and extruding. The mass ratio of polylactic acid, copper oxide/graphene oxide composite nanomaterial, EDC and N-hydroxysuccinimide is 50-100:10:1-5:0.2-1.