Improving the EMI shielding of graphene oxide (GNO)-coated glass-fiber–GNO–MA-grafted polypropylene (PP) composites and nylon 1D–2D nanocomposite foams

Raagulan, Kanthasamy; Ghim, Jinsoo; Braveenth, Ramanaskanda; Chai, Kyu Yun; Kim, Bo Mi

doi:10.1039/d1ra09124g

Cited by 9 publications

(4 citation statements)

References 33 publications

(106 reference statements)

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“…Results have confirmed that the EMI shielding properties were strongly associated with the shielding materials' ECs and magnetic permeabilities 62–64 . Many materials with outstanding electrical or magnetic conductivities have been applied in EMI shielding fields 65,66 . EMI shielding materials mainly include metal, inorganic, polymer composites, and so forth 67,68 .…”

Section: Research Progress Of Emi Shielding Materialsmentioning

confidence: 64%

“…[62][63][64] Many materials with outstanding electrical or magnetic conductivities have been applied in EMI shielding fields. 65,66 EMI shielding materials mainly include metal, inorganic, polymer composites, and so forth. 67,68 It should be pointed out that the CPCs filled with hybrid carbonbased/metallic/magnetic fillers have become the most promising materials for EMI shielding.…”

Section: Research Progress Of Emi Shielding Materialsmentioning

confidence: 99%

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Recent advances in structural design of conductive polymer composites for electromagnetic interference shielding

Zheng,

Wang,

Zhu

et al. 2023

Polymer Composites

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The proliferation of electronic devices and wireless communication in our daily lives has led to a significant increase in electromagnetic pollution. This issue poses a serious threat to the proper functioning of electronic equipment as well as human health. Therefore, the investigation of materials with superior electromagnetic interference (EMI) shielding capabilities has garnered growing interest. In this paper, the mechanisms of EMI shielding were first introduced briefly. It was noted that the development of advanced EMI shielding materials involved adhering to principles such as minimizing reflection loss, enhancing absorption loss, and incorporating multiple internal reflections. The construction and shielding properties of traditional EMI shielding materials were introduced. Unlike metal materials with high densities and reflection loss, lightweight conductive polymer composites (CPCs) have been the most promising EMI shielding materials. Meanwhile, carbon‐based nanofillers such as carbon nanotubes and graphene nanosheets, along with two‐dimensional transition metal carbonitrides MXenes Ti3C2Tx, have emerged as the most promising and versatile conductive nanofillers for CPCs. The EMI shielding performance and loss mechanism of CPCs with homogeneous structure, segregated structure, laminated structure, and porous structure were introduced in detail. It was noted that the EMI shielding performance could be significantly improved by incorporating multiple structures into the same CPCs, such as a rational combination of segregated and porous structures. Finally, the challenges and development trends of CPCs for EMI shielding applications were discussed.Highlights Mechanisms of EMI shielding were introduced from aspect of energy dissipation. Structure–property of traditional EMI shielding materials was described. EMI shielding performance of CPCs with different structures was summarized. Future challenges and growing trends of CPCs for EMI shielding were discussed. Absorption‐dominated loss and multiple structure design were emphasized.

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Section: Research Progress Of Emi Shielding Materialsmentioning

confidence: 64%

Section: Research Progress Of Emi Shielding Materialsmentioning

confidence: 99%

Recent advances in structural design of conductive polymer composites for electromagnetic interference shielding

Zheng,

Wang,

Zhu

et al. 2023

Polymer Composites

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“…These results indicate that the PDMS-NH 2 were successfully grafted on GO and then chemically reduced to PDMS-NH 2 -g-G, which are consistent with FTIR and Raman results. In the C1s spectrum of PI-MAg-G, the peak of C OH disappeared, and the concentration of C O C and O C O groups is much lower than that of GO, implying that most of the maleic anhydride of PI-MA reacted with the C OH groups of GO surface, 31,41,42 followed by the chemical reduction of oxygenated groups (Figure 3c).…”

Section: Characterization Of Pdms-nh 2 -G-g and Pi-ma-g-gmentioning

confidence: 99%

Compatibilization of immiscible polymer blends by reactive polymer grafted graphene with interfacial crosslinking

Gavgani

Goharpey

2023

J of Applied Polymer Sci

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We investigate reactive compatibilization by applying two multifunctional polymers grafted on a graphene surface, which leads to crosslinked interphase at immiscible polymer blends. Reactive compatibilizer‐grafted graphene (RCG) nanoparticles were synthesized through esterification and amidation reactions between oxidative groups of graphene oxide and reactive multifunctional groups of polymers. Polymer blends of polyisoprene (PI) and polydimethysiloxane (PDMS) with PI:PDMS ratio of 30:70 or 70:30 and RCG nanoparticle loadings from 0.1 and 1 wt% were evaluated by optical microscopy and rheometry. The results indicated that the blend with 0.1 wt% RCG showed unusual characteristics including nonspherical and bridged droplets, while those containing 1 wt% RCG showed usual droplet‐matrix morphology. The rheological results are also asymmetric: the blend with 0.1 wt% RCG displayed gel‐like behavior in the dynamic oscillatory tests, high viscosity, slow interfacial relaxation during startup shear flow, and divergence in the transient stress response due to coalesced and bridged droplets. However, the latter blend containing 1 wt% RCG reveals liquid‐like behavior, low viscosity, and convergence in the transient stress response due to stabilized droplet‐matrix morphology. Overall, it was suggested that these asymmetries are attributable to interfacial crosslinked interphase formed through an in‐situ reaction between multifunctional polymers grafted on graphene sheets.

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“…For this reason, EMI shielding polymer nanocomposites are often prepared using conductive filler materials with excellent dielectric and magnetic properties, such as carbon black, carbon nanotubes (CNTs), graphene, , metal nanoparticles, conductive polymers, and core–shell composites . Many zero- (0D), one- (1D), two- (2D), and three-dimensional (3D) materials have also been studied and combined to create conductive filler materials. − Furthermore, it has been shown that the EMI shielding efficiency (SE) of a filler material is also significantly affected by its structural characteristics.…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanoplatelet/Multiwalled Carbon Nanotube/Polypyrrole Hybrid Fillers in Polyurethane Nanohybrids with 3D Conductive Networks for EMI Shielding

Lin

Chen

et al. 2022

ACS Omega

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This work reports the preparation of graphene nanoplatelet (GNP)/multiwalled carbon nanotube (MWCNT)/ polypyrrole (PPy) hybrid fillers via in situ chemical oxidative polymerization with the addition of a cationic surfactant, hexadecyltrimethylammonium bromide. These hybrid fillers were incorporated into polyurethane (PU) to prepare GNP/MWCNT/PPy/PU nanohybrids. The electrical conductivity of the nanohybrids was synergistically enhanced by the high conductivity of the hybrid fillers. Furthermore, the electromagnetic interference (EMI) shielding effectiveness (SE) was greatly increased by interfacial polarization between the GNPs, MWCNTs, PPy, and PU. The optimal formulation for the preparation of GNP/MWCNT/PPy three-dimensional (3D) nanostructures was determined by optimization experiments. Using this formulation, we successfully prepared GNP/PPy nanolayers (two-dimensional) that are extensively covered by MWCNT/PPy nanowires (one-dimensional), which interconnect to form GNP/MWCNT/PPy 3D nanostructures. When incorporated into a PU matrix to form a nanohybrid, these 3D nanostructures form a continuous network of conductive GNP−PPy−CNT−PPy−GNP paths. The EMI SE of the nanohybrid is 35−40 dB at 30−1800 MHz, which is sufficient to shield over 99.9% of electromagnetic waves. Therefore, this EMI shielding material has excellent prospects for commercial use. In summary, a nanohybrid with excellent EMI SE performance was prepared using a facile and scalable method and was shown to have great commercial potential.

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Improving the EMI shielding of graphene oxide (GNO)-coated glass-fiber–GNO–MA-grafted polypropylene (PP) composites and nylon 1D–2D nanocomposite foams

Abstract: The proliferation of the latest electronic gadgets and wireless communication devices can trigger electromagnetic interference (EMI), which has a detrimental impact on electronic devices and humans.

Cited by 9 publications

References 33 publications

Recent advances in structural design of conductive polymer composites for electromagnetic interference shielding

Recent advances in structural design of conductive polymer composites for electromagnetic interference shielding

Compatibilization of immiscible polymer blends by reactive polymer grafted graphene with interfacial crosslinking

Graphene Nanoplatelet/Multiwalled Carbon Nanotube/Polypyrrole Hybrid Fillers in Polyurethane Nanohybrids with 3D Conductive Networks for EMI Shielding

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