Charge transport mechanism of thermally reduced graphene oxide and their fabrication for high performance shield against electromagnetic pollution

Recycled polyvinyl butyral film (RPVB) is reactive blending with different dosages of styrene‐maleic anhydride copolymer (SMA) in a torque rheometer. The shape memory properties of the RPVB/SMA blends are studied. The cross‐linked reaction between RPVB and SMA is the main factor affecting the shape memory properties of the binary blends. When the RPVB and SMA blending ratios are 3:1 and 4:1, both blends exhibit superior shape memory properties (the shape fixation ratios are above 96% at room temperature, and the shape recovery ratios are over 99% at 80°C). Furthermore, the RPVB/SMA/NRGO composites are prepared by adding the NH2‐functionalized reduced graphene oxide (NRGO) with an excellent thermal stability. The introduction of NRGO not only improves the tensile properties of the composites, but also endows them with an excellent light‐induced shape memory function.

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“…A modified Hummers method was used to prepare GO from graphite 23 . Then, the obtained GO was used to prepare NRGO 24,25 .…”

Section: Methodssupporting

confidence: 71%

“…A modified Hummers method was used to prepare GO from graphite. 23 Then, the obtained GO was used to prepare NRGO. 24,25 The concrete step is as follows: (1) 2.5 g of GO was dispersed in 250 ml of deionized water and the mixture was sonicated for 1 h. The pH was adjusted to 10 with aqueous ammonia.…”

Section: Preparation Of Nrgomentioning

confidence: 99%

Combined heat‐ and light‐induced shape memory behavior of RPVB/SMA/NRGO composites by reactive melt blending

Zhang

Gao

et al. 2022

Polymers for Advanced Techs

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“…And in the Figure 7(e), two relaxation peaks can be observed in the ∼6 GHz and ∼17 GHz, which may be attributed to the interfacial polarization. According to the XPS spectra, some residual oxygenic functional groups (C−O and CO) still remain in the RGO of thermally ZFO@SiO 2 @RGO composites, which will act as polarized centers, 33 The polarizations are also induced by the multi-interfaces and double junctions (ZFO@SiO 2 , SiO 2 @RGO) as well as associated loss mechanism. 34 It is generally considered that the dielectric loss of a material consists of polarization loss and conduction loss.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis of Hierarchical ZnFe₂O₄@SiO₂@RGO Core–Shell Microspheres for Enhanced Electromagnetic Wave Absorption

Feng

Hou

Wang

et al. 2017

ACS Appl. Mater. Interfaces

171

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Hierarchical structured ZnFeO@SiO@RGO core-shell nanocomposites were prepared via a "coating-coating" route, and its structure, composition and electromagnetic properties were characterized. Compared with the binary composites of ZnFeO@SiO, the hierarchical ZnFeO@SiO@RGO ternary composites exhibited enhanced electromagnetic wave (EMW) absorption properties in terms of the effective bandwidth and minimum reflection loss (RL). Furthermore, EMW absorption properties of the prepared samples can be tuned by changing RGO content and thickness of SiO layer to reach the best impedance match. The minimum RL of the sample with a thickness of 2.8 mm can reach -43.9 dB at 13.9 GHz, and its effective bandwidth (RL ≤ -10 dB) was up to 6 GHz. Hence, the obtained products can be a new candidate for lightweight EMW absorbing materials.

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“…In our study, λ is 532 nm. The increase of the R value corresponded to the decrease of La, which indicates that the introduction of KH550 increased the number of unsaturated carbon atoms at the corner and edges of the carbon fiber surface [34,35]. Therefore, the introduction of KH550 would increase the disorder degree.…”

Section: Raman Spectra Analysismentioning

confidence: 99%

Fabrication of Core-Shell Chopped Cf-Phenolic Resin Composite Powder for Laser Additive Manufacturing of Cf/SiC Composites

et al. 2021

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Laser additive manufacturing is a promising technique for the preparation of complex-shaped SiC composites. High-quality powders are critical for high-precision laser printing. In this work, core-shell Cf @phenolic resin (PR) composites for selective laser sintering of carbon fiber reinforced silicon carbide (Cf/SiC) composites were fabricated by surface modification using 3-aminopropyltriethoxy silane coupling agent (KH550) in combination with planetary ball milling. PR coated uniformly on the fiber surface to form a core-shell structure. The effects of PR on the morphology, elemental composition, interfacial interactions, and laser absorption of the core-shell composite powder were investigated in detail. Results indicated that the composite powder exhibited good laser absorption within the infrared band.

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Charge transport mechanism of thermally reduced graphene oxide and their fabrication for high performance shield against electromagnetic pollution

Cited by 26 publications

References 52 publications

Combined heat‐ and light‐induced shape memory behavior of RPVB/SMA/NRGO composites by reactive melt blending

Combined heat‐ and light‐induced shape memory behavior of RPVB/SMA/NRGO composites by reactive melt blending

Synthesis of Hierarchical ZnFe₂O₄@SiO₂@RGO Core–Shell Microspheres for Enhanced Electromagnetic Wave Absorption

Fabrication of Core-Shell Chopped Cf-Phenolic Resin Composite Powder for Laser Additive Manufacturing of Cf/SiC Composites

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Charge transport mechanism of thermally reduced graphene oxide and their fabrication for high performance shield against electromagnetic pollution

Cited by 26 publications

References 52 publications

Combined heat‐ and light‐induced shape memory behavior of RPVB/SMA/NRGO composites by reactive melt blending

Combined heat‐ and light‐induced shape memory behavior of RPVB/SMA/NRGO composites by reactive melt blending

Synthesis of Hierarchical ZnFe2O4@SiO2@RGO Core–Shell Microspheres for Enhanced Electromagnetic Wave Absorption

Fabrication of Core-Shell Chopped Cf-Phenolic Resin Composite Powder for Laser Additive Manufacturing of Cf/SiC Composites

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Synthesis of Hierarchical ZnFe₂O₄@SiO₂@RGO Core–Shell Microspheres for Enhanced Electromagnetic Wave Absorption