▎ 摘　　要

The shape memory behavior studies are established concerning polycaprolactone/thermoplastic starch/graphene nanoplatelet (PCL/TPS/GNP) nanocomposites. Response surface methodology (RSM) and Box-Behnken statistical design experiment methods were employed to evaluate the effects of PCL, glycerol, and GNP contents on shape memory properties and to optimize the values of these experimental parameters. For this purpose, the shape fixity and shape recovery of 15 samples with various compositions were measured, and high R-2 values in the range of 0.75-0.88 were obtained for all responses. The shape recovery rate of several samples also was studied. The droplet-matrix morphology observed in SEM images and the DMTA results revealed enhanced compatibility between polymeric phases due to the presence of GNPs. The shape recovery step was accomplished using water stimuli. The results suggested that increasing the glycerol content from 15 to 25% (by weights) or decreasing the PCL content from 30 to 10% (by weights) amplifies the shape recovery of the nanocomposites by about 20% due to the higher potentials of water uptake. The recovery duration from temporary to permanent shape up to 100 s showed a high recovery rate of samples by immersion in 37 ? water. In contrast to inspections, adding GNP to the blends showed insignificant changes in shape memory behavior owing to choosing the water-stimuli method.{GRAPHICAL ABSTRACT}