Aramid nanofiber-induced assembly of graphene nanosheets toward highly thermostable and freestanding films for electromagnetic interference shielding

Li, Yike; Du, Pei-Yao; Wang, Zhixing; Huang, Hua‐Dong; Jia, Li‐Chuan

doi:10.1016/j.compositesa.2022.107063

Cited by 22 publications

(9 citation statements)

References 58 publications

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“…The use of liquid metals in the polymer composites showed high shielding values up to 90 dB. 27–29 The use of fillers such as Mxenes 30 and Ni plating 31 and graphene sheets 32 over CF were also studied in the past to improve the shielding effectiveness of the CF/PEEK laminates however, our results indicate that the process induced microstructure dominates both the structural as well as functional properties. It is important to note that the SE T values of our CF/PEEK laminates show higher EMI shielding performance without any modifications or addition of external materials.…”

Section: Resultsmentioning

confidence: 91%

Process dependent interface strengthening, de-icing and EMI shielding performance in PEEK/CF laminates

Raj¹,

Sampath²,

Kumar³

et al. 2023

Mater. Adv.

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Section: Resultsmentioning

confidence: 91%

Process dependent interface strengthening, de-icing and EMI shielding performance in PEEK/CF laminates

Raj¹,

Sampath²,

Kumar³

et al. 2023

Mater. Adv.

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“…The unique structures can extend the propagation path of electromagnetic waves inside the composite foam while also promoting multiple electromagnetic wave reflections and scatterings within the interfaces, thus facilitating electromagnetic wave shielding. However, R and A are the parameters to represent the ratio of electromagnetic power attenuated by the shielding materials toward the overall incident power, while SE R and SE A represent the capability of shielding materials to attenuate the penetrated electromagnetic waves. , As presented in Figure e, SE A for GP- x /SA-MF exhibits a significant enhancement due to the increase of the GP content, which indicates the generation of enriched networks in foams. SE R increases slightly but maintains at a low level overall (Figure f), showing that the composite foams have low reflection characteristics, which benefits from the three-dimensional porous structure of prepared materials for better access of electromagnetic waves.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The C 1 s peaks of SA at the binding energy of 284.8, 285.8, 287.2, and 288.4 eV are attributed to C−C, C−O, C�O, and O−C�O bonds individually (Figure 3e). From Figure 3f, the C 1 s peaks of GP-20/SA-MF related at 284.8, 286.1, 287.6, 288.8, and 290 eV correspond to C−C, C�C, C−O, C�O, and O−C�O bonds, respectively 47. The same chemical bonds as MF and SA appear in GP-20/SA-MF, while the XPS peak of C�C bond appears due to the addition of GP.…”

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confidence: 99%

Construction of Three-Dimensional Network Hierarchy Structure Based on Melamine Foam for Electromagnetic Shielding

Mo,

Li,

et al. 2023

ACS Appl. Nano Mater.

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With the rapid development of wireless communication and electronic equipment, there is an urgent need for lightweight and compressible electromagnetic interference (EMI) shielding materials to solve the increasingly serious problem of electromagnetic pollution. Graphene (GP) is widely used in functional materials with excellent electromagnetic interference shielding properties due to its large aspect ratio and specific surface area. Hierarchical structure attached by GP is constructed in melamine foams (MF) with the assistance of sodium alginate (SA) through simple impregnation and freeze-drying methods. Benefiting from such unique hierarchical porous structure, the composite foam achieves a high electrical conductivity of 39.1 S/m and an exceptional electromagnetic interference (EMI) shielding effectiveness (EMI SE) of 45.8 dB in the range of X-band (8.2−12.4 GHz) at only 2 mm thickness, resulting in a significant EMI shielding effectiveness as 3541.7 dB cm 2 g −1 . In addition, SA endows the improved compressive strength of MF with less effect on the resilience of MF due to the supporting effect of SA. The prepared foams show superior thermal stability, making it possible to expand the range of applications. This work fabricated highly efficient EMI shielding materials for reducing electromagnetic pollution, while also broadening the application areas of EMI shielding materials in complex environments.

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“…The characteristic of high specific surface area endows ANF with excellent processibility and makes it a kind of promising nanobuilding block . The excellent processibility of ANF has attracted plenty of researchers to focus on the design of diverse functional materials, such as electromagnetic interference shielding materials, − battery separator materials, − insulation materials, , sensor materials, , and structural materials. − Recently, there are also some works focused on the preparation of ANF/BNNS thermal conductive films . For instance, Fu et al reported a highly thermoconductive (46.7 W m –1 K –1 ) and super-flexible film that consisted of one-dimensional (1D) rigid ANFs and 2D BNNSs .…”

Section: Introductionmentioning

confidence: 99%

Self-Stacked 3D Anisotropic BNNS Network Guided by Para-Aramid Nanofibers for Highly Thermal Conductive Dielectric Nanocomposites

Miao

Xie

et al. 2023

ACS Appl. Mater. Interfaces

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The enhancement of the heat-dissipation property of polymerbased composites is of great practical interest in modern electronics. Recently, the construction of a three-dimensional (3D) thermal pathway network structure for composites has become an attractive way. However, for most reported high thermal conductive composites, excellent properties are achieved at a high filler loading and the building of a 3D network structure usually requires complex steps, which greatly restrict the large-scale preparation and application of high thermal conductive polymer-based materials. Herein, utilizing the framework-forming characteristic of polymerization-induced para-aramid nanofibers (PANF) and the high thermal conductivity of hexagonal boron nitride nanosheets (BNNS), a 3D-laminated PANF-supported BNNS aerogel was successfully prepared via a simple vacuum-assisted self-stacking method, which could be used as a thermal conductive skeleton for epoxy resin (EP). The obtained PANF-BNNS/EP nanocomposite exhibits a high thermal conductivity of 3.66 W m −1 K −1 at only 13.2 vol % BNNS loading. The effectiveness of the heat conduction path was proved by finite element analysis. The PANF-BNNS/EP nanocomposite shows outstanding practical thermal management capability, excellent thermal stability, low dielectric constant, and dielectric loss, making it a reliable material for electronic packaging applications. This work also offers a potential and promotable strategy for the easy manufacture of 3D anisotropic high-efficiency thermal conductive network structures.

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Aramid nanofiber-induced assembly of graphene nanosheets toward highly thermostable and freestanding films for electromagnetic interference shielding

Cited by 22 publications

References 58 publications

Process dependent interface strengthening, de-icing and EMI shielding performance in PEEK/CF laminates

Process dependent interface strengthening, de-icing and EMI shielding performance in PEEK/CF laminates

Construction of Three-Dimensional Network Hierarchy Structure Based on Melamine Foam for Electromagnetic Shielding

Self-Stacked 3D Anisotropic BNNS Network Guided by Para-Aramid Nanofibers for Highly Thermal Conductive Dielectric Nanocomposites

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