Ultralight Graphene Foam/Conductive Polymer Composites for Exceptional Electromagnetic Interference Shielding

Wu, Ying; Wang, Zhenyu; Liu, Xu; Shen, Xi; Zheng, Qingbin; Xue, Quan; Kim, Jang Kyo

doi:10.1021/acsami.7b01017

Cited by 465 publications

(219 citation statements)

References 67 publications

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“…When the screen printing method was used and the thickness was reduced to 50 µm, SE is about 13 dB. Wu et al [425] and total EMI SE of over 90 dB were obtained. The information of CP-based composites for EMI shielding in recent three years is summarized in Table 10.…”

Section: Electromagnetic Interference Shieldingmentioning

confidence: 99%

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

et al. 2018

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Section: Electromagnetic Interference Shieldingmentioning

confidence: 99%

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

et al. 2018

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“…Conducting polymers are effective discharge layers as well as conducting resists in electron beam lithography, find applications in metallization (electrolytic and electroless) of plated through-holes for printed circuit board technology, provide excellent electrostatic discharge protection for packages and housings of electronic equipment, provide excellent corrosion protection for metals, and may have applications in electromagnetic interference shielding [305]. Wu et al developed ultralight, high-performance electromagnetic interference (EMI) shielding graphene foam (GF)/poly (3,4ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) composites [306]. Intrinsically conducting polymers, especially PANI and PPY, are most promising alternative candidates for EMI shielding due to their lightweight, which is of critical importance in aerospace applications, corrosion resistance, ease of processing, and tunable conductivities [307].…”

Section: Current Applications and Future Challengesmentioning

confidence: 99%

Conducting Polymers: Concepts and Applications

Mishra

2018

Jour. Atomic Mole. Conden. Nano Phys.

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The developments in the field of electrically conducting polymers have grown very rapidly since the discovery and there is a very sharp increase in conductivity when intrinsically insulating organic conjugated polymers are doped with oxidizing and reducing agents. An overview of technological developments involving conducting polymers clearly indicates that the field expands at unprecedented rates. The manuscript first introduces the conducting polymers (CPs), conducting mechanism, concepts of doping and briefly introduces main applications. Different types of CPs, their unique properties and synthesis is discussed. The present review will help the effective implementation of conducting polymers in different fields, which directly depends on the degree of understanding of their behaviour and properties.properties of the conjugated polymers can be varied to a very large extent by appropriate functionalization. Most extensively studied area of the application of undoped conjugated polymers is the fabrication of the polymeric light-emitting diodes, i.e. electronic devices which exploit the phenomenon of electroluminescence. Electroluminescence of conjugated polymers and more precisely poly(p-phenylene vinylene) was first reported by Burroughes et al. [11] in 1990. These undoped conjugated polymers can also be used in the fabrication of a large variety of other devices like organic field-effect transistors. Polymer LEDs show attractive characteristics, including efficient light generation, with great potential for commercialisation. Again the polymer interests in polymers is in their potential use for rapid, low-cost processing using film-forming polymer solutions. Like the conductive polymers, the semi-conductive polymers obtain their properties from their conduction-molecular orbitals and valence molecular orbitals, i.e., bonding π and antibonding π * orbitals, respectively.In electro-chemical light emitting cells, the semi-conductive polymer could be surrounded asymmetrically with a hole-injection electrode on one side, and a low work function, electron injecting metal contact like aluminum, magnesium, calcium etc. on the other side. The emission of light is then the result of radiative charge carrier recombination in the polymer as electrons from one side and holes from the other recombine.Conducting polymers are conjugated polymers, namely organic compounds that have an extended p-orbital system, through which electrons can move from one end of the polymer to the other. In conjugated polymers, the bonding leads to one unpaired electron (the π-electron) per carbon atom. Moreover, π-bonding, in which the carbon orbitals are in the sp 2 pz configuration and in which the orbitals of successive carbon atoms along the backbone overlap, leads to electron delocalization along the backbone of the polymer. This electronic delocalization provides the "highway" for charge mobility along the backbone of the polymer chain. Electronically conducting polymers are extensively conjugated molecules, and it is believed that they po...

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“…Graphitic foams of relative density below 0.001 are generally supported by a polymeric layer [55][56][57] due to such problems of instability and irreproducibility.…”

Section: Microstructurementioning

confidence: 99%

Compressive behavior and failure mechanisms of freestanding and composite 3D graphitic foams

et al. 2018

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Open-cell graphitic foams were fabricated by chemical vapor deposition using nickel templates and their compressive responses were measured over a range of relative densities. The mechanical response required an interpretation in terms of a hierarchical micromechanical model, spanning 3 distinct length scales. The power law scaling of elastic modulus and yield strength versus relative density suggests that the cell walls of the graphitic foam deform by bending. The length scale of the unit cell of the foam is set by the length of the struts comprising the cell wall, and is termed level I. The cell walls comprise hollow triangular tubes, and bending of these strut-like tubes involves axial stretching of the tube walls. This length scale is termed level II. In turn, the tube walls form a wavy stack of graphitic layers, and this waviness induces interlayer shear of the graphitic layers when the tube walls are subjected to axial stretch. The thickness of the tube wall defines the third length scale, termed level III. We show that the addition of a thin, flexible ceramic Al 2 O 3 scaffold stiffens and strengthens the foam, yet preserves the power law scaling. The Page 2 of 33 hierarchical model gives fresh insight into the mechanical properties of foams with cell walls made from emergent 2D layered solids.

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Ultralight Graphene Foam/Conductive Polymer Composites for Exceptional Electromagnetic Interference Shielding

Cited by 465 publications

References 67 publications

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

Recent progress on nanostructured conducting polymers and composites: synthesis, application and future aspects

Conducting Polymers: Concepts and Applications

Compressive behavior and failure mechanisms of freestanding and composite 3D graphitic foams

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