Flexible thermoplastic polyurethane/reduced graphene oxide composite foams for electromagnetic interference shielding with high absorption characteristic

Jiang, Qiuyue; Liao, Xia; Li, Junsong; Jia, Chen; Gui, Wang; Yi, J. Z.; Yang, Qi; Li, Guangxian

doi:10.1016/j.compositesa.2019.05.017

Cited by 153 publications

(83 citation statements)

References 52 publications

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“…Among the initial studies, Yang et al [5] developed polystyrene foams obtaining shielding efficiencies (SE) around 20 dB with 15 wt.% and 7 wt.% carbon nanofibers and nanotubes, respectively. Subsequent works improved the SE or decreased the loading fractions required to achieve commercially attractive EMI shielding materials (around 20 dB in the X-band region (8.2-12.4 GHz)) and mostly looked at thermoplastic or rigid thermoset matrices or coated the foam surfaces with conductive nanofillers [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These previous studies have demonstrated that the development of the cellular structure causes the redistribution of the nanoparticles, decreasing the average gap between the nanoparticles along the cell walls, thus enhancing the electrical conductivity and EMI shielding properties [9,14].…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…Hence, we calculated the extent of improvement reported on foamed nanocomposites filled with hybrid fillers as a way to establish a comparative analysis ( Table 2 ). It can be observed that our synthesized EPDM foam filled with BT/MWCNTs (20/10 phr) shows the highest percentage of improvement for SE T (40%), compared to the other polymeric foams reported by others [ 7 , 13 , 34 , 44 , 49 , 50 ].…”

Section: Resultsmentioning

confidence: 57%

“…The small reduction could be attributed to the high elastic shape recovery resulting from the entropic features of cross-linked EPDM networks assisted by the air molecules trapped within the cells. Only one study has been found reporting a decrease in SE T after repeated bending for polyurethane/reduced graphene oxide nanocomposite foams at 10 GHz [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Highly Elastic Foams with Enhanced Electromagnetic Wave Absorption Based On Ethylene-Propylene-Diene-Monomer Rubber Filled with Barium Titanate/Multiwall Carbon Nanotube Hybrid

et al. 2020

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Hybrid ethylene-propylene-diene-monomer (EPDM) nanocomposite foams were produced via compression molding with enhanced electromagnetic wave absorption efficiency. The hybrid filler, consisting of 20 phr ferroelectric barium titanate (BT) and various loading fractions of multi-wall carbon nanotubes (MWCNTs), synergistically increased the electromagnetic (EM) wave absorption characteristics of the EPDM foam. Accordingly, while the EPDM foam filled with 20 phr BT was transparent to the EM wave within the frequency range of 8.2–12.4 GHz (X-band), the hybrid EPDM nanocomposite foam loaded with 20 phr BT and 10 phr MWCNTs presented a total shielding effectiveness (SE) of ~22.3 dB compared to ~16.0 dB of the MWCNTs (10 phr). This synergistic effect is suggested to be due to the segregation of MWCNT networks within the cellular structure of EPDM, resulting in enhanced electrical conductivity, and also high dielectric permittivity of the foam imparted by the BT particles. Moreover, the total SE of the BT/MWCNTs loaded foam samples remained almost unchanged when subjected to repeated bending due to the elastic recovery behavior of the crosslinked EPDM foamed nanocomposites.

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“…Polyurethane nanocomposites are a relatively common group of materials with graphene addition [69,70]. Example of SEM images of thermoplastic polyurethane (TPU) powders and reduced graphene oxide (RGO) coated TPU powders with 0, 0.5, 1.5, 2.5, 3.5 and 4.5 wt% RGO were shown in Figure 4.…”

Section: Properties Of Selected Composite Materials With Addition Of mentioning

confidence: 99%

Preparation and properties of composite materials containing graphene structures and their applicability in personal protective equipment: A Review

Kośla

Olejnik

Olszewska

2020

Reviews on Advanced Materials Science

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Graphene is a new, advanced material with many possible applications in basic and clinical medicine, electronics and automation. Graphene compounds can be successfully used as an integral part of drug delivery systems, in the construction of transistors, polar processors, touch screens, solar cells and in the production of materials for the manufacture of personal protective equipment, i.e. products and equipment intended to protect the health and life of users. The literature review presented in this paper concerns physical and mechanical properties of composites containing graphene or its structure as well as methods of obtaining polymer, metallic and ceramic composites doped with graphene structures. Data analysis of the potential use of graphene and its composites in personal protective equipment such as monitoring sensors, clothing and security equipment such as ballistic armor, helmets and protective clothing were also reviewed and summarized.

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Flexible thermoplastic polyurethane/reduced graphene oxide composite foams for electromagnetic interference shielding with high absorption characteristic

Cited by 153 publications

References 52 publications

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

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

Preparation and Characterization of Highly Elastic Foams with Enhanced Electromagnetic Wave Absorption Based On Ethylene-Propylene-Diene-Monomer Rubber Filled with Barium Titanate/Multiwall Carbon Nanotube Hybrid

Preparation and properties of composite materials containing graphene structures and their applicability in personal protective equipment: A Review

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