▎ 摘　　要

This effort reports on novel polylactic acid-derived polyurethane (PU) and polyamide 6,12 (PA6,12)-based blends and graphene-reinforced nanocomposite. PU/PA6,12 (50:50) blend was opted as matrix based on molecular weight and shear stress performance. PU/PA6,12 with 5 wt% graphene (PU/PA6,12/graphene 3) showed improved T-0 and T-max of 515 and 541 degrees C relative to neat blend. PU/PA6,12/graphene 3 also revealed significantly high tensile (53 MPa) and flexural strength (1,711 MPa). For Eschericia coli, Staphylococcus, and Pseudomonas bacterial strains, nanocomposite with higher graphene loading produced significant inhibitory effects. Novel nanocomposites displayed fine antimicrobial and barrier properties against O-2 and H2O to be used as a packaging material.