Compressible, amphiphilic graphene-based aerogel using a molecular glue to link graphene sheets and coated-polymer layers

Yu, Xiang; Liu, Libin; Li, Ting; Dang, Zhao

doi:10.1016/j.matdes.2016.08.057

Cited by 20 publications

(8 citation statements)

References 55 publications

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“…The aerogel shows reversibility even at the strain up to 95%, and the curve, which can recover to the origin point, implies the fully reversible elastic deformation of CGA. 31,32 In Figure 2-2c, the CGA has a larger maximum stress compared with other studies, which is attributed to the surface and interface reinforce. 33−37 As the large deformation occurred in CGA, there was no obvious destruction in the microstructure owing to the protection of metallic-CNT network structures and the tightly connected NPs, which can be seen in Figure S3.The relationship of the amount of magnetic NPs with mechanical stress and density is shown in Figure S4.…”

Section: Resultsmentioning

confidence: 66%

“…In Figure -2a, the stress–strain curves were almost unchanged even after 200 cycles at the maximum strain of 30%, which illustrated the nice structural stability of CGA. , Figure -2b shows the stress–strain curve of CGA at maximum strains of 30, 65, 80, and 95%. The aerogel shows reversibility even at the strain up to 95%, and the curve, which can recover to the origin point, implies the fully reversible elastic deformation of CGA. , In Figure -2c, the CGA has a larger maximum stress compared with other studies, which is attributed to the surface and interface reinforce. − As the large deformation occurred in CGA, there was no obvious destruction in the microstructure owing to the protection of metallic-CNT network structures and the tightly connected NPs, which can be seen in Figure S3.The relationship of the amount of magnetic NPs with mechanical stress and density is shown in Figure S4. As the amount of magnetic NPs increased, the mechanical performance showed wavy variations owing to the increase of hardness caused by the redundant NPs adsorbed on graphene sheets.…”

Section: Resultsmentioning

confidence: 78%

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Preparation of Graphene Aerogel with High Mechanical Stability and Microwave Absorption Ability via Combining Surface Support of Metallic-CNTs and Interfacial Cross-Linking by Magnetic Nanoparticles

Qin

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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The preparation of graphene aerogel by hydrothermal or chemical reduction has been one of the hot topics of research. But in the process of assembly, the random weak connection of GO flakes leads to irreversible deformation under compression, and the mechanical stability of aerogel based on graphene is one of its drawbacks that is hard to overcome. Here, a novel method to prepare graphene aerogel with high mechanical stability was proposed via combining surface support brought by metallic-CNT networks and interfacial cross-linking of GO sheets achieved by nanoparticle selective absorption. Thoroughly dispersed metallic-CNTs absorbed on the basal plane of GO flakes formed continuous network structures, which not only improve the mechanical performance of flakes but also provide steric effects to impel the adsorption of metallic oxide magnetic nanoparticles concentrated on the edge of GO flakes, thereby guaranteeing the interfacial connection of adjacent rGO flakes by nanoparticle cross-linking. Meanwhile, the surface and interface reinforce approach can greatly improve the electrical conductivity and mechanical stability of composites. Owing to the light weight, abundant interface, high electrical conductivity, combined with the superparamagnetic properties brought by the magnetic nanoparticles, composite aerogel with high mechanical stability and excellent microwave absorption was achieved, of which the effective absorption bandwidth of the aerogel is 4.4–18 GHz and the maximum value can reach −49 dB. This approach could not only be used to prepare microwave absorption materials with light weight and high performance but also be meaningful to enlarge the construction and application of carbon-based materials.

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Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 78%

Preparation of Graphene Aerogel with High Mechanical Stability and Microwave Absorption Ability via Combining Surface Support of Metallic-CNTs and Interfacial Cross-Linking by Magnetic Nanoparticles

Qin

Zhang

et al. 2019

ACS Appl. Mater. Interfaces

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“…The relatively smooth curve of the PO‐GH indicates that there are no obvious fractures of the network during the compression process. The PO‐GH and PO‐GA exhibited a maximum compressive stress of 200± 2.5 KPa and 75± 3.6 KPa, Young's modulus of 266.2± 0.5 KPa and 14.75± 0.5 KPa, which were considerably higher than those of other graphene aerogels . Moreover, both curves show steady rise and no sudden decrease, suggesting that their structures have a certain degree of flexibility and can endure some form of deformation.…”

Section: Resultsmentioning

confidence: 94%

1, 2‐Epoxy Propane Induced Self‐Assembly of Macroscopic Graphene with Good Adsorption

Gao

et al. 2017

ChemistrySelect

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A universal and simple one‐step approach to fabricate three‐dimensional (3D) graphene materials with the aid of 1, 2‐epoxy propane (PO) has been reported in this paper. PO, as one of widely used engineering materials, is easy to produce ring‐opening reaction under acidic conditions. When PO is introduced into graphene oxide (GO) dispersion (pH=2.4‐3.8), a 3D graphene architecture will be formed through the reaction of PO with oxygen‐containing functional groups (i. e. epoxy, carbonyl and carboxyl groups) on the surface of GO sheets. The obtained 3D graphene monolithic exhibits high porosity, strong mechanical performance, and good adsorption capacities for oil and organic dyes, which may find potential applications in wastewater treatment, environmental remediation, and electrochemistry.

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“…Synthetic polymer/GCA has higher strength, lower density, larger specific surface area, and good strength and electrochemical properties, and can make sensors, adsorbents, catalysts, and other items [ 29 ]. As shown in Figure 6 , Xiang et al [ 17 ] prepared PVA/GCA by using γ -oxo-1-pyranobutyric acid (OPBA) as adhesive to hold the PVA coating and graphene skeleton together. The GCA can be used as a pressure response sensor due to its compressibility and deformation recovery.…”

Section: Composition Of Gcamentioning

confidence: 99%

Fabrication, Structure, Performance, and Application of Graphene-Based Composite Aerogel

Wei

Liu

et al. 2021

Materials

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Graphene-based composite aerogel (GCA) refers to a solid porous substance formed by graphene or its derivatives, graphene oxide (GO) and reduced graphene oxide (rGO), with inorganic materials and polymers. Because GCA has super-high adsorption, separation, electrical properties, and sensitivity, it has great potential for application in super-strong adsorption and separation materials, long-life fast-charging batteries, and flexible sensing materials. GCA has become a research hotspot, and many research papers and achievements have emerged in recent years. Therefore, the fabrication, structure, performance, and application prospects of GCA are summarized and discussed in this review. Meanwhile, the existing problems and development trends of GCA are also introduced so that more will know about it and be interested in researching it.

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Compressible, amphiphilic graphene-based aerogel using a molecular glue to link graphene sheets and coated-polymer layers

Cited by 20 publications

References 55 publications

Preparation of Graphene Aerogel with High Mechanical Stability and Microwave Absorption Ability via Combining Surface Support of Metallic-CNTs and Interfacial Cross-Linking by Magnetic Nanoparticles

Preparation of Graphene Aerogel with High Mechanical Stability and Microwave Absorption Ability via Combining Surface Support of Metallic-CNTs and Interfacial Cross-Linking by Magnetic Nanoparticles

1, 2‐Epoxy Propane Induced Self‐Assembly of Macroscopic Graphene with Good Adsorption

Fabrication, Structure, Performance, and Application of Graphene-Based Composite Aerogel

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