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利用氧化石墨烯(GO)改性聚己内酯(PCL)与聚乳酸(PLA)共混,制备了PCL/PLA/GO纳米复合材料。采用DSC、XRD和POM测试手段,表征了复合材料的结晶性能,通过SEM扫描观察了纳米复合材料的微观形貌,并对复合材料的力学性能进行了测试。结果表明:随着GO含量的增加,结晶度有一定程度的提高,且晶核密度增加;GO片层穿插在PLA相中,褶皱或重叠,这跟GO的分散均匀性有关,且复合材料的拉伸强度从50.38 MPa升高到55.91 MPa,而断裂伸长率则有一定程度的降低。
PCL / PLA / GO nanocomposites were prepared by blending GO with modified polycaprolactone (PCL) and polylactic acid (PLA). The crystalline properties of the composites were characterized by DSC, XRD and POM. The microstructure of the nanocomposites was observed by SEM and the mechanical properties of the composites were tested. The results show that with the increase of GO content, the crystallinity increases to a certain extent and the density of nuclei increases. The GO sheets interspersed in the PLA phase and fold or overlap, which is related to the GO homogeneity. Tensile strength increased from 50.38 MPa to 55.91 MPa, while the elongation at break decreased to a certain degree.