A three-dimensional absorber hybrid with polar oxygen functional groups of MWNTs/graphene with enhanced microwave absorbing properties

作者：Chen, Yijun; Zhang, Aibo^*; Ding, Lichao; Liu, Yang; Lu, Honglong

来源：Composites Part B: Engineering , 2017, 108: 386-392.

DOI：10.1016/j.compositesb.2016.10.014

• Reduced graphene oxide
• Polar oxygen functional groups
• Three-dimensional structures
• Microwave absorbing property

A three-dimensional absorber hybrid with polar oxygen-containing functional groups was fabricated by the incorporation of two-dimensional reduced graphene oxide (rGO) with one-dimensional multi-walled carbon nanotubes (MWNTs) via ultrasonication filtration method. The aim of the work is to investigate the effectiveness of three-dimensional absorber hybrid with polar oxygen-containing functional groups on the enhanced microwave absorbing properties. As a contrast, the three-dimensional absorber hybrid of Graphene nanoplatelets (GNPs) and MWNTs were also fabricated by the same method. The structure and morphology of the GNPs(rG0)/MWNTs hybrids were characterized by scanning electron microscopy (SEM), trans-mission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. SEM and TEM results indicated that the three-dimensional architecture of GNPs(rGO)/MWNTs was fabricated, and the dispersion of GNPs(and/or rGO) was promoted due to the bridge construct of MWNTs between GNPs. The polarization differences between GNPs/MWNTs and rGO/MWNTs were investigated by the Cole-Cole semicircle model. The microwave absorbing results revealed that the rGO/MWNTs hybrids exhibited a 41 dB reflection loss in the frequency at 9.6 GHz with a bandwidth of 0.8 GHz (9.2 GHz-10 GHz) below 20 dB, which was higher than that of the GNPs/MWNTs hybrids (-23 dB at 8.4 GHz, 0.2 GHz bandwidth below 20 dB). This investigation indicated that the three-dimensional with polar oxygen-containing functional groups was beneficial to enhancing microwave absorbing properties.

• 出版日期2017-1-1
• 单位西北工业大学