Synergistic effect of carbon nanotube and graphene nanoplates on the mechanical, electrical and electromagnetic interference shielding properties of polymer composites and polymer composite foams

Zhang, Hongming; Zhang, Guangcheng; Meng, Tao; Zhou, Lisheng; Li, Jiantong; Fan, Xun; Shi, Xuetao; Qin, Jianbin

doi:10.1016/j.cej.2018.07.144

Cited by 260 publications

(98 citation statements)

References 59 publications

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“…It was also seen that hybrid specimens break at higher tensile values than copper doped specimens alone. Similar results are given in the literature [5,7,8,19].…”

Section: Mechanicalsupporting

confidence: 90%

“…where ρ c , ρ f and ρ m are the densities of composite, of the filler, and of the matrix, respectively, while Φ f is the volumetric concentration of filler. Substituting values in (7), one can obtain the variation of the density of the C/P composite material with respect to the volumetric concentration of the added filler material. This change is shown in Fig.…”

Section: Densitymentioning

confidence: 99%

“…In hybrid systems, Zhang et al [7] used two different dimensional fillers to explore their synergistic effect on the mechanical and electrical properties of PMMA composite. They reported that the hybrid filler promotes the mechanical performance but restricts the synergistic effect for electrical properties.…”

Section: Introductionmentioning

confidence: 99%

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Size, Concentration and Content Effect of Copper/Graphite Hybrid Dopant on Mechanical, Thermal and Electrical Conductivity Characteristics of Unsaturated Polyester Resin

Yaman

Öktem

2020

Acta Phys. Pol. A

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In this paper, mechanical, thermal, electrical, and physical properties of unsaturated polyester resin with dendritic-shaped copper(Cu)-graphite (Gr) fillers were experimentally investigated and correlations were proposed with several theoretical models. On the other hand, the Gr filler is added as a secondary filler to provide synergy and obtain better conductivities. For this purpose, 5 wt% Gr filler was added as a secondary filler while Cu was added with changing weight rates. In each experiment, the basic aim is to determine the effects of both filler size and concentration on the mechanical, thermal, and electrical characterizations of the composite mixture. It is observed that an increase in filler concentration causes an increase in thermal conductivities. On the contrary, the coefficient of thermal expansion and specific heat decrease with increasing filler content. The hybrid filler allows the positive synergistic effect on mechanical performance but restricts conductivity properties. The particle size also causes a minimal linear increase in thermal conductivity. Thermal analysis such as thermogravimetric analysis and differential scanning calorimetry show that the thermal stability increases with the filler concentration. On the other hand, the electrical conductivity increases with increasing filler particle size and concentration. Using this high conductive novel composite mixture as an electrode hard steel parts were engraved in an electric discharge machine. Regarding the experimental-theoretical correlation, the best agreement is achieved with the Maxwell model.

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“…It was also seen that hybrid specimens break at higher tensile values than copper doped specimens alone. Similar results are given in the literature [5,7,8,19].…”

Section: Mechanicalsupporting

confidence: 90%

Section: Densitymentioning

confidence: 99%

See 1 more Smart Citation

Size, Concentration and Content Effect of Copper/Graphite Hybrid Dopant on Mechanical, Thermal and Electrical Conductivity Characteristics of Unsaturated Polyester Resin

Yaman

Öktem

2020

Acta Phys. Pol. A

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“…Meanwhile, the samples filled with 10 phr MWCNTs showed excellent EMI SE performance,~30 and 35 dB at 10 GHz for solid and foam samples, respectively. The excellent electrical conductivities derived from electron tunneling, hopping, and conduction are closely linked to the ohmic loss, which is regarded as a crucial part of microwave absorption [47,48]._ENREF_53 Moreover, in the case of the foams, the scattering effects within the cellular structural increased the extent of the wave energy dissipation and, hence, increased the total EMI shielding values. Finally, we normalized the total EMI SE by the density, specific EMI SE, to properly compare the SE of the solid and foam samples (Figure 6b).…”

Section: Resultsmentioning

confidence: 99%

Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene–Propylene–Diene Monomer/Multiwall Carbon Nanotube Nanocomposites

et al. 2020

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The need for electromagnetic interference (EMI) shields has risen over the years as the result of our digitally and highly connected lifestyle. This work reports on the development of one such shield based on vulcanized rubber foams. Nanocomposites of ethylene–propylene–diene monomer (EPDM) rubber and multiwall carbon nanotubes (MWCNTs) were prepared via hot compression molding using a chemical blowing agent as foaming agent. MWCNTs accelerated the cure and led to high shear-thinning behavior, indicative of the formation of a 3D interconnected physical network. Foamed nanocomposites exhibited lower electrical percolation threshold than their solid counterparts. Above percolation, foamed nanocomposites displayed EMI absorption values of 28–45 dB in the frequency range of the X-band. The total EMI shielding efficiency of the foams was insignificantly affected by repeated bending with high recovery behavior. Our results highlight the potential of cross-linked EPDM/MWCNT foams as a lightweight EM wave absorber with high flexibility and deformability.

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“…It was demonstrated, for example, that in a polymer composite the presence of CNTs prevented aggregation of graphene nanoparticles and, on the other hand, graphene nanoparticles improved the dispersion of CNTs [7,8]. That enhanced the total dc conductivity and improved the mechanical and electromagnetic shielding interface properties of CNT/ graphene-based composite [9,10]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Recognition of Spatial Distribution of CNT and Graphene in Hybrid Structure by Mapping with Coherent Anti-Stokes Raman Microscopy

et al. 2020

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The shape of coherent anti-Stokes Raman scattering (CARS) spectral line depends on the ratio of the vibrational and electronic contributions to the third-order susceptibility of the material. The G-mode (1590 cm −1 ) of graphene and carbon nanotubes (CNTs) exhibits opposite features in the CARS spectrum, showing "dip" and "peak," respectively. Here, we consider the CARS spectra of graphene and carbon nanotubes in terms of Fano formalism describing the line shapes of CARS resonances. We show that imaging at only 1590 cm −1 is not sufficient to separate the constituents of a composite material consisting of both graphene and CNTs. We propose an algorithm to map the graphene and CNTs in a composite material.

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Synergistic effect of carbon nanotube and graphene nanoplates on the mechanical, electrical and electromagnetic interference shielding properties of polymer composites and polymer composite foams

Cited by 260 publications

References 59 publications

Size, Concentration and Content Effect of Copper/Graphite Hybrid Dopant on Mechanical, Thermal and Electrical Conductivity Characteristics of Unsaturated Polyester Resin

Size, Concentration and Content Effect of Copper/Graphite Hybrid Dopant on Mechanical, Thermal and Electrical Conductivity Characteristics of Unsaturated Polyester Resin

Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene–Propylene–Diene Monomer/Multiwall Carbon Nanotube Nanocomposites

Recognition of Spatial Distribution of CNT and Graphene in Hybrid Structure by Mapping with Coherent Anti-Stokes Raman Microscopy

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