Controllable fabrication of elastomeric and porous graphene films with superior foldable behavior and excellent electromagnetic interference shielding performance

Lai, Dengguo; Chen, Xiaoxiao; Wang, Yin

doi:10.1016/j.carbon.2019.11.047

Cited by 61 publications

(36 citation statements)

References 34 publications

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“…In the FTIR spectra of CA, 3358 cm −1 is the stretching vibration peak of O–H, 2903 cm −1 is the stretching vibration peak of C–H in CH 2 , 1470~1320 cm -1 is the bending vibration peak of C–H, 1450 cm -1 is the stretching vibration peak of C=O, 1173 cm −1 is the stretching vibration peak of C–O–H, and 1058 cm -1 is the C–O–C stretching vibration peak. In the FTIR spectra of CA@GO, in addition to the characteristic peaks mentioned above, a stretching vibration peak of O–C=O at 1652 cm -1 appears, attributed to the introduction of GO [ 34 ]. In contrast, in the FTIR spectra of CCA@rGO, these functional groups almost completely disappear, mainly due to the fact that CCA@rGO is chemically inert so that it shows almost no characteristic absorption peaks.…”

Section: Resultsmentioning

confidence: 99%

Lightweight, Flexible Cellulose-Derived Carbon Aerogel@Reduced Graphene Oxide/PDMS Composites with Outstanding EMI Shielding Performances and Excellent Thermal Conductivities

et al. 2021

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In order to ensure the operational reliability and information security of sophisticated electronic components and to protect human health, efficient electromagnetic interference (EMI) shielding materials are required to attenuate electromagnetic wave energy. In this work, the cellulose solution is obtained by dissolving cotton through hydrogen bond driving self-assembly using sodium hydroxide (NaOH)/urea solution, and cellulose aerogels (CA) are prepared by gelation and freeze-drying. Then, the cellulose carbon aerogel@reduced graphene oxide aerogels (CCA@rGO) are prepared by vacuum impregnation, freeze-drying followed by thermal annealing, and finally, the CCA@rGO/polydimethylsiloxane (PDMS) EMI shielding composites are prepared by backfilling with PDMS. Owing to skin-core structure of CCA@rGO, the complete three-dimensional (3D) double-layer conductive network can be successfully constructed. When the loading of CCA@rGO is 3.05 wt%, CCA@rGO/PDMS EMI shielding composites have an excellent EMI shielding effectiveness (EMI SE) of 51 dB, which is 3.9 times higher than that of the co-blended CCA/rGO/PDMS EMI shielding composites (13 dB) with the same loading of fillers. At this time, the CCA@rGO/PDMS EMI shielding composites have excellent thermal stability (THRI of 178.3 °C) and good thermal conductivity coefficient (λ of 0.65 W m-1 K-1). Excellent comprehensive performance makes CCA@rGO/PDMS EMI shielding composites great prospect for applications in lightweight, flexible EMI shielding composites. Graphic abstract

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Section: Resultsmentioning

confidence: 99%

Lightweight, Flexible Cellulose-Derived Carbon Aerogel@Reduced Graphene Oxide/PDMS Composites with Outstanding EMI Shielding Performances and Excellent Thermal Conductivities

et al. 2021

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“…47 The collection of microscale-diameter graphene sheets in fibres provides a large surface area that is attractive for shielding because it increases the number of interactions with EM waves. 48,49 In addition, the microstructure of the graphene fibre surface, such as wrinkles, grooves, and other heterogeneous interfaces, synergistically enhances the interaction with EM waves. 50 By controlling the surface density and configuration structure of GFF, the electrical and EMI shielding properties of graphene nanocomposites can be easily adjusted to suit the practical application environment.…”

Section: Electromagnetic Interference Shielding Performancementioning

confidence: 99%

Graphene fibre film/polydimethylsiloxane nanocomposites for high-performance electromagnetic interference shielding

Dong

et al. 2022

Nanoscale Adv.

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“…To emphasize the efficient EMI SE of the oRGOF membranes, the SSE/t of EMI shielding materials in the latest document is listed in Figure 8. [40][41][42][43][44][45] The oRGOF membranes mentioned have a higher SSE/t (33333 dB cm 2 g -1 ) along the fiber axial direction, which is much higher than other materials presented in Figure 8. This prominent feature is mainly due to unique orientation, hierarchical structures of graphite sheets and ordered distribution of graphite fibers, demonstrating the superiority of ultrathin microstructure in EMI shielding materials.…”

Section: Figure 4amentioning

confidence: 99%

Ultrathin, Ultralight, and Anisotropic Ordered Reduced Graphene Oxide Fiber Electromagnetic Interference Shielding Membrane

Chi

et al. 2021

Adv Materials Technologies

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Developing an electromagnetic interference (EMI) shielding material with lightweight, ultrathin, and high‐performance complex electromagnetic wave pollution has become a research trend. Here, a novel ultrathin ordered reduced graphene oxide fiber (oRGOF) membranes are reported with wrinkles, grooves, and hierarchical structure by a simple assembly process based on wet spinning. The results show that the oRGOF membranes have obvious anisotropic conductivity and directional electromagnetic shielding properties. The measured electrical conductivity along the fiber axial direction (0°) is higher than that along the fiber radial direction (90°). Furthermore, the EMI shielding performance difference under different rotation angles is more than 25 dB (31.0 dB at 0°, 4.9 dB at 90°). The thickness of the resultant oRGOF membrane is 0.03 mm and area density of 0.9 mg cm−2, and the specific EMI SE (SSE/t) is 33333 dB cm2 g−1 along the fiber axis. The oRGOF membranes show flexible and durable performance under repeated bending and straightening cycles tests over 160 times, without significant reduction of the shielding performance. Thus, the ultrathin, ultralight, and anisotropic oRGOF electromagnetic interference shielding membrane have broad prospects for both civilian and military applications.

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Controllable fabrication of elastomeric and porous graphene films with superior foldable behavior and excellent electromagnetic interference shielding performance

Cited by 61 publications

References 34 publications

Lightweight, Flexible Cellulose-Derived Carbon Aerogel@Reduced Graphene Oxide/PDMS Composites with Outstanding EMI Shielding Performances and Excellent Thermal Conductivities

Lightweight, Flexible Cellulose-Derived Carbon Aerogel@Reduced Graphene Oxide/PDMS Composites with Outstanding EMI Shielding Performances and Excellent Thermal Conductivities

Graphene fibre film/polydimethylsiloxane nanocomposites for high-performance electromagnetic interference shielding

Ultrathin, Ultralight, and Anisotropic Ordered Reduced Graphene Oxide Fiber Electromagnetic Interference Shielding Membrane

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