Interface Control and Performance of Polylactide/Graphene Oxide Nanocomposites

doi:10.19491/j.issn.1001-9278.2019.01.016

Abstract

Abstract: Graphene oxide (GO) was firstly modified with ethylenediamine (EDA), dodecylamine (DA) and octadecylamine (ODA), and then functionalized graphene oxide (FGO) / poly (lactic acid) (PLA) nanocomposite films were prepared by hot pressing. The effects of GO-g-EDA, GO-g-DA and GO-g-ODA on the interfacial properties, mechanical properties, thermal stability and oxygen resistance of nanocomposites were studied. The results show that the combination property of composites is mainly depended on the chain length of the grafted molecular. the performance of composite filled with GO-g-ODA is superior to that filled with GO-g-EDA and GO-g-DA fillers . With addition of 0.5wt% GO-g-ODA loading, the tensile strength and elongation at break reach a maximum of 88.52MPa and 9.68%; the oxygen permeability coefficient decreased from 4.21×10-13 to 1.172×10-14 cm3cm/(cm2?s?Pa), about 97.2% decline. In addition, the thermal stability of PLA is also improved with the presence of functionalized graphene oxide.

References

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