Polyamide 6/MXene-grafted graphene oxide hybrid nanocomposites

Polymer nanocomposites offer a way to bridge the gap between nanomaterials and macroscale materials. Nanocomposites based on MXene (2D transition metal carbide, nitride, or carbonitride) and graphene are a hot topic in the fields of materials and chemistry because of their unique properties. In this research, MXene and graphene oxide were modified by acidified 6-aminocaproic acid and hexamethylene diamine, respectively. The modified MXene and graphene oxide were hybridized through condensation reaction to give MXene-grafted graphene oxide (MXene-g-GO). The resulting MXene-g-GO hybrid filler was further blended with commercial polyamide 6 (PA6). The effects of MXene, grapheme oxide and MXene-grafted graphene oxide on thermal stability, mechanical properties and electromagnetic interference shielding efficiency of PA6 were investigated through material characterization and relevant tests. The pattern of SEM, XRD and XPS demonstrated that modified MXene (mMXene) was grafted to the surface of modified graphene oxide (mGO) successfully. The results of TGA and mechanical experiments showed that MXene and graphene have a certain synergistic effect on some properties of polyamide 6 nanocomposites and aggregation between the fillers was alleviated. Besides, PA6 nanocomposites, having improved electromagnetic interference shielding efficiency, can be prepared using hybridized fillers. This study introduced a polymer material that can be used to make the external shell of the communication device, which has a specific reference value to control harming of the electromagnetic waves.

Automated summary

Polymer nanocomposites containing MXene-grafted graphene oxide (MXene-g-GO) were synthesized and their effects on the properties of polyamide 6 (PA6) were studied. The modified MXene and graphene oxide were successfully hybridized and the resulting MXene-g-GO filler showed improved thermal stability, mechanical properties, and electromagnetic interference shielding efficiency. This study provides a novel polymer material for the external shell of communication devices with the potential for controlling electromagnetic waves.