Aramid-based highly conductive composite films by incorporating graphene for electromagnetic interference shielding and Joule heating applications

Xie, Chunjie; Fang, Yuwen; Chen, Yuexi; Liu, Jing; Guo, Zhao‐Xia; Hao, Xiangyang; Li, Chun; Tuo, Xinlin

doi:10.1016/j.compscitech.2023.109992

Cited by 22 publications

(6 citation statements)

References 71 publications

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“…Table compares the EMI SE of some recently reported EMI shielding materials to those of our films. Evidently, our CFO–CNTs/RGO p film exhibits a superior EMI shielding performance owing to its high EMI SE at a low thickness. ,,− …”

Section: Resultsmentioning

confidence: 87%

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Liu,

Zhang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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Thin, high-strength graphene films are at the forefront of research regarding electromagnetic interference (EMI) shielding applications. Herein, we synthesized a novel graphene-based film (CoFe 2 O 4 nanoparticle-carbon nanotubes (CFO−CNTs)/reduced graphene oxide (RGO)p) reinforced with porous CFO−CNTs nanocomposites and self-cross-linking trimethylolpropane triacrylate between the RGO sheets. Only a 15-μm-thick (thin) CFO−CNTs/RGOp film exhibits an excellent EMI shielding effectiveness (EMI SE) value of 38.7 dB as well as an excellent tensile strength (84.5 MPa) because of synergistic interfacial and cross-linking interactions. Further, the film subjected to ultraviolet aging retains 86.6% and 82.4% of its original EMI SE and tensile strength, respectively, indicating high durability. Because of the outstanding integrated features and high durability, the as-prepared film can be used to shield aircrafts and miniaturized electronic devices from EMIs in extreme environments.

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Section: Resultsmentioning

confidence: 87%

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Liu,

Zhang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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“…Since the conductivity largely affects the value of R, the comparison of Figure 8d,e shows that the value of the R curve increases significantly with the increase of the film conductivity. 4 The R values of both 0.4 wt % C-MWCNTs/PI films and CPFs are high versus A, but the difference between the former is substantially less than that of the latter. Additionally, the values of T for both are minimal.…”

Section: Electrical Conductivity and Emi Shielding Performancementioning

confidence: 94%

“…SE M can be negligible when the shield thickness is greater than the skin depth or when SE T is higher Since the conductivity largely affects the value of R, the comparison of Figure 8d,e shows that the value of the R curve increases significantly with the increase of the film conductivity. 4 The R values of both 0.4 wt % C-MWCNTs/PI films and CPFs are high versus A, but the difference between the former is substantially less than that of the latter. Additionally, the values of T for both are minimal.…”

Section: Electrical Conductivity and Emi Shielding Performancementioning

confidence: 94%

“…Increasing the filler content may sacrifice the mechanical properties and thickness of the composite material, which is contrary to the development goal of "portability" of today's devices. 4 Therefore, it is a common solution strategy to utilize a variety of conductive materials for the composition and construction of a suitable film structure.…”

Section: Introductionmentioning

confidence: 99%

“…However, selecting only one conductive material as the conductive filler for the composite film is restricted in achieving the desired level of performance. Increasing the filler content may sacrifice the mechanical properties and thickness of the composite material, which is contrary to the development goal of “portability” of today’s devices . Therefore, it is a common solution strategy to utilize a variety of conductive materials for the composition and construction of a suitable film structure.…”

Section: Introductionmentioning

confidence: 99%

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Caffeic-Acid-Functionalized MWCNTs and PEDOT:PSS Formed Composite Flexible Films with “Reinforced Concrete” Structure for Electrical Heating and EMI Shielding

Liu,

Tian,

Bao

et al. 2024

ACS Appl. Mater. Interfaces

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Nowadays, flexible multifunctional composites are attracting much attention and are practically being used in various emerging electronic devices. However, most composites suffer from the disadvantages of high loadings of conductive fillers, complicated preparation processes, and low energy conversion efficiency. In this article, Caffeic acidmodified multiwalled carbon nanotubes (C-MWCNTs)/poly(3,4-ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS)/polyimide (PI) composite films (CPFs) were prepared using a simple layer-by-layer deposition method. The "reinforced concrete" structure of the C-MWCNTs/PEDOT:PSS layer ensures high electrical conductivity of the film, while the PI layer provides excellent mechanical properties (72.69 MPa). The composite film exhibits excellent electrothermal response and thermal stability up to approximately 125 °C at 5 V. In addition, the good conductivity of the film provides its electromagnetic shielding effectiveness (32.69 dB). With these advantages, we expect that flexible CPFs will be widely utilized in wearable devices, electromagnetic interference (EMI) shielding applications, and thermal management of personal or electronic devices.

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A Facile Method in Fabricating Flexible Conductive Composites with Large‐Size Segregated Structures for Electromagnetic Interference Shielding

He,

Chen,

Shao

et al. 2024

Macromol. Rapid Commun.

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To resist the plastic deformation of polymer particles during hot press molding, high molecular weights, and moduli are required for composites with segregated structures, thus the prepared composites exhibit poor flexibility. Also, larger particle sizes can bring lower percolation thresholds while the ensuing greater deformation destroys the conductive network. Moreover, segregated composites still face preparation complexities. Herein, a facile method for developing flexible composites with large‐size segregated structures is proposed. First, silver‐coated polydopamine‐modified reduced graphene oxide (Ag@PrGO), as conductive fillers, is prepared by electroless plating. Next, polydimethylsiloxane (PDMS)‐coated polyolefin elastomer (POE) beads are put into a bag containing the fillers. After a simple shaking, the fillers are adhered to the POE surface as the cohesive property of cured PDMS. Finally, flexible composites with large‐size segregated structures are obtained via hot pressing. Benefiting from the 2D structure of the Ag@PrGO and the ability to slip, the conductive networks possess adaptable deformability. The prepared composites exhibit excellent electrical conductivity (203.55 S cm−1) at filler volume fractions of 3.4 vol%. The EMI shielding effectiveness can reach 70 dB in the X‐band at a thickness of 1.9 mm and remains stable after bending and rubbing damage. This work paves the way for constructing large‐size segregated structures.

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Aramid-based highly conductive composite films by incorporating graphene for electromagnetic interference shielding and Joule heating applications

Cited by 22 publications

References 71 publications

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Caffeic-Acid-Functionalized MWCNTs and PEDOT:PSS Formed Composite Flexible Films with “Reinforced Concrete” Structure for Electrical Heating and EMI Shielding

A Facile Method in Fabricating Flexible Conductive Composites with Large‐Size Segregated Structures for Electromagnetic Interference Shielding

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Aramid-based highly conductive composite films by incorporating graphene for electromagnetic interference shielding and Joule heating applications

Cited by 22 publications

References 71 publications

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe2O4 Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe2O4 Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Caffeic-Acid-Functionalized MWCNTs and PEDOT:PSS Formed Composite Flexible Films with “Reinforced Concrete” Structure for Electrical Heating and EMI Shielding

A Facile Method in Fabricating Flexible Conductive Composites with Large‐Size Segregated Structures for Electromagnetic Interference Shielding

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Product

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Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding