The composition and microstructure of graphene aerogels (GAs) play crucial roles in the electromagnetic shielding performance of their polymer composites. In this paper, the microwave-reduced graphene aerogel was prepared by the rapid microwave irradiation of GA. And then, the MRGA/Polyetherketone cardo (PEK-C) composites were fabricated via a vacuum-assisted impregnating method. The study showed that the microwave irradiation significantly enhances the quality of GAs, leading to a less defective structure and an increase in conductivity. Furthermore, the MRGAs are very effective in endowing composites with high electromagnetic interference (EMI) shielding efficiency. When the filler content is 4.06 wt-%, the MRGA/PEK-C composite exhibits an EMI SE of 36.4 dB in the X band (8.2–12.4 GHz). The study also indicated that the shielding mechanism of composites is dominated by absorption.
SongZ, XiaZ, NieJ, Improving the electrical and electromagnetic shielding properties of conductive silicon rubber filled with Ni-coated carbon fibre by magnetic field. Plast Rubber Compos. 2016; 45 ( 5 ): 224–228.
6.
ShuiX, ChungD.Nickel filament polymer-matrix composites with low surface impedance and high electromagnetic interference shielding effectiveness. J Electron Mater. 1997; 26 ( 8 ): 928–934.
7.
ThomassinJ-M, JeromeC, PardoenT, Polymer/carbon based composites as electromagnetic interference (EMI) shielding materials. Mater Sci Eng R. 2013; 74 ( 7 ): 211–232.
8.
HayashidaK, MatsuokaY.Electromagnetic interference shielding properties of polymer-grafted carbon nanotube composites with high electrical resistance. Carbon. 2015; 85: 363–371.
9.
VermaP, SainiP, MalikRS, Excellent electromagnetic interference shielding and mechanical properties of high loading carbon-nanotubes/polymer composites designed using melt recirculation equipped twin-screw extruder. Carbon. 2015; 89: 308–317.
10.
YuanB, YuL, ShengL, Comparison of electromagnetic interference shielding properties between single-wall carbon nanotube and graphene sheet/polyaniline composites. J Phys D: Appl Phys. 2012; 45 ( 23 ): 235108.
11.
LiS, LiW, NieJ, Synergistic effect of graphene nanoplate and carbonized loofah fiber on the electromagnetic shielding effectiveness of PEEK-based composites. Carbon. 2019; 143: 154–161.
12.
JeddiJ, KatbabAA, MehranvariM.Investigation of microstructure, electrical behavior, and EMI shielding effectiveness of silicone rubber/carbon black/nanographite hybrid composites. Polym Compos. 2019; 40 ( 10 ): 4056–4066.
13.
ChenY, ZhangH-B, WangM, Phenolic resin-enhanced three-dimensional graphene aerogels and their epoxy nanocomposites with high mechanical and electromagnetic interference shielding performances. Compos Sci Technol. 2017; 152: 254–262.
14.
WangH, LiN, WangW, Bead nano-necklace spheres on 3D carbon nanotube scaffolds for high-performance electromagnetic-interference shielding. Chem Eng J. 2019; 360: 1241–1246.
15.
ShenB, LiY, ZhaiW, Compressible graphene-coated polymer foams with ultralow density for adjustable electromagnetic interference (EMI) shielding. ACS Appl Mater Interfaces. 2016; 8 ( 12 ): 8050–8057.
JiaJ, SunX, LinX, Exceptional electrical conductivity and fracture resistance of 3D interconnected graphene foam/epoxy composites. ACS Nano. 2014; 8 ( 6 ): 5774–5783.
18.
LiX-H, LiX, LiaoK-N, Thermally annealed anisotropic graphene aerogels and their electrically conductive epoxy composites with excellent electromagnetic interference shielding efficiencies. ACS Appl Mater Interfaces. 2016; 8 ( 48 ): 33230–33239.
19.
GonzálezM, BaselgaJ, PozueloJ.Modulating the electromagnetic shielding mechanisms by thermal treatment of high porosity graphene aerogels. Carbon. 2019; 147: 27–34.
20.
HuangfuY, RuanK, QiuH, Fabrication and investigation on the PANI/MWCNT/thermally annealed graphene aerogel/epoxy electromagnetic interference shielding nanocomposites. Compos Part A Appl Sci Manuf. 2019; 121: 265–272.
21.
WangH, TengK, ChenC, Conductivity and electromagnetic interference shielding of graphene-based architectures using MWCNTs as free radical scavenger in gamma-irradiation. Mater Lett. 2017; 186: 78–81.
22.
KahrizPK, MahdaviH, EhsaniA, Influence of synthesized functionalized reduced graphene oxide aerogel with 4,4′-methylenedianiline as reducing agent on electrochemical and pseudocapacitance performance of poly orthoaminophenol electroactive film. Electrochim Acta. 2020; 354: 136736.
23.
LiW, ZhouB, WangM, Silane functionalization of graphene oxide and its use as a reinforcement in bismaleimide composites. J Mater Sci. 2015; 50 ( 16 ): 5402–5410.
24.
ZhangJ, YangH, ShenG, Reduction of graphene oxide via l-ascorbic acid. Chem Commun. 2010; 46 ( 7 ): 1112–1114.
StobinskiL, LesiakB, MalolepszyA, Graphene oxide and reduced graphene oxide studied by the XRD, TEM and electron spectroscopy methods. J Electron Spectros Relat Phenom. 2014; 195: 145–154.
27.
MatteviC, EdaG, AgnoliS, Evolution of electrical, chemical, and structural properties of transparent and conducting chemically derived graphene thin films. Adv Funct Mater. 2009; 19 ( 16 ): 2577–2583.
28.
GaoJ, LiuF, LiuY, Environment-friendly method to produce graphene that employs vitamin C and amino acid. Chem Mater. 2010; 22 ( 7 ): 2213–2218.
29.
HuangfuY, LiangC, HanY, Fabrication and investigation on the Fe3O4/thermally annealed graphene aerogel/epoxy electromagnetic interference shielding nanocomposites. Compos Sci Technol. 2019; 169: 70–75.
30.
SunY, LuoS, SunH, Engineering closed-cell structure in lightweight and flexible carbon foam composite for high-efficient electromagnetic interference shielding. Carbon. 2018; 136: 299–308.
31.
ZengZ, ZhangY, MaXYD, Biomass-based honeycomb-like architectures for preparation of robust carbon foams with high electromagnetic interference shielding performance. Carbon. 2018; 140: 227–236.
RavindrenR, MondalS, BhawalP, Superior electromagnetic interference shielding effectiveness and low percolation threshold through the preferential distribution of carbon black in the highly flexible polymer blend composites. Polym Compos. 2019; 40 ( 4 ): 1404–1418.
36.
BatrakovK, KuzhirP, MaksimenkoS, Enhanced microwave-to-terahertz absorption in graphene. Appl Phys Lett. 2016; 108 ( 12 ): 123101.
