Mechanically Robust, Electrically Conductive and Stimuli‐Responsive Binary Network Hydrogels Enabled by Superelastic Graphene Aerogels

Qiu, Ling; Liu, Diyan; Wang, Yufei; Cheng, David C.; Zhou, Kun; Ding, Jie; Truong, Van-Tan; Li, Dan

doi:10.1002/adma.201305359

Cited by 184 publications

(130 citation statements)

References 48 publications

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“…Two-dimensional (2D) graphene sheets exhibiting extraordinary high specific surface area [4,5], high intrinsic stiffness and strength [6], high electrical/thermal property [7,8] have been exploited in three-dimensional (3D) graphene foams [9][10][11] or aerogels [12][13][14]. These 3D graphene structures with low-density and versatility show great promise for a broad range of applications in the fields of catalysis, sensor, electronics, energy storage/conversion, oil/water separation [14][15][16][17][18][19][20][21][22]. However, the challenge remains on how to effectively tune the chemistry, architecture and functionality of these 3D porous materials with reversible compressibility, which is essential to ensure their reliable function.…”

Section: Introductionmentioning

confidence: 99%

Silane bonded graphene aerogels with tunable functionality and reversible compressibility

Guan

Gao

Pei

et al. 2016

Carbon

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Section: Introductionmentioning

confidence: 99%

Silane bonded graphene aerogels with tunable functionality and reversible compressibility

Guan

Gao

Pei

et al. 2016

Carbon

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“…Graphene frameworks with continuous and interconnected channels were constructed using several methods like vacuum filtration of graphene suspension, CVP on nickel foams, hydrothermal synthesis, thermal reduction and lyophilization [43][44][45][46]. 3D graphene provided a superior platform to form high quality composites [47,48]. For instance, Cheng et al successfully loaded poly(dimethyl siloxane) into 3D graphene foams by infiltration, as shown in Fig.…”

Section: Synthesis Of Graphene-polymer Nanocompositesmentioning

confidence: 99%

Graphene Polymer Nanocomposites for Fuel Cells

Zhu

Liu

Mahmood

et al. 2015

Graphene-Based Polymer Nanocomposites in Electronics

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Fuel cells have long been considered as highly efficient devices for energy conversion which transform chemical energy directly into electricity, without any venomous pollutants emitted into ambient environment. In recent years, graphene-polymer nanocomposites have attracted intense interest as functional components in fuel cells. This chapter focuses on the potential applications of graphene-polymer composites in fuel cells. Recent advancement in the synthesis of graphene, polymer, graphene-polymer composites will be presented. Then, latest explorations of graphene-polymer composites applied as membranes, anode and cathode materials will be summarized. Furthermore, the vital roles of graphene-polymer to support noble metal catalysts will be illustrated. Finally, prospects of graphene-polymer composites for fuel cells will be outlined for further development.

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“…Dan Li * and Ling Qiu Low-density cellular materials with high compressibility, elasticity and fatigue resistance hold promise for applications in mechanical damping, flexible electronics, actuators and multifunctional polymer nanocomposites [1][2][3][4][5]. Recently, cellular materials with ultralow density and superelasticity have been successfully synthesized with robust and flexible nanoscale building blocks such as graphene and carbon nanotubes [6][7][8][9].…”

Section: Super-carbon Spring: a Biomimetic Designmentioning

confidence: 99%

Super-carbon spring: a biomimetic design

Qiu

2016

Sci. China Mater.

Self Cite

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Low-density cellular materials with high compressibility, elasticity and fatigue resistance hold promise for applications in mechanical damping, flexible electronics, actuators and multifunctional polymer nanocomposites [1][2][3][4][5]. Recently, cellular materials with ultralow density and superelasticity have been successfully synthesized with robust and flexible nanoscale building blocks such as graphene and carbon nanotubes [6][7][8][9]. However, when these cellular materials undergo large strain cyclic compression, microstructure cracking or buckling failure often occurs, leading to large energy dissipation, plastic deformation and reduction of strength [1,2,6]. As the mechanical properties of a cellular material are dependent on not only the mechanical attributes of the basic building blocks, but also the hierarchical structure of the assembled cellular network, it has been very challenging to find an effective solution to synthesize a cellular material with combined high compressibility, elasticity and fatigue resistance.Excitingly, a team led by Shu-Hong Yu and Heng-An Wu from the University of Science and Technology of China (USTC) [10] recently reported a new biomimetic design to tackle this long-standing challenge by borrowing a design widely existing in macroscopic biological world. They observed that the arch-shape structure in biology was highly favorable for realization of combined fatigue resistance and elasticity. A good example is the arch of human feet, which acts as an elastic spring-type cushioning system to facilitate human motions (Fig. 1a) and the arch-shaped spring-type suspension systems can help to support the axle and absorb mechanical shock.The USTC researchers have provided a smart strategy to realize the biomimetic design at the micrometer scale in carbon-based cellular materials. They first fabricated a monolithic chitosan-graphene oxide (CS-GO) composite cellular scaffold consisting of numerous parallel, aligned and thin lamellas through a bidirectional freezing process, followed by freeze drying and thermal annealing. Interestingly, they discovered that the thin lamellas were self-crumpled into waved micro-arch morphology as a result of the local volume decrease of the CS matrix caused by its partial mass loss in the annealing process (Fig. 1b).The resultant carbon cellular structure containing lamellar micro-arches is found to be highly elastic, despite the fact that the obtained monolithic material is composed of amorphous carbon-graphene (C-G) composite constituent, which is generally very brittle. The carbon elastomer can completely recover to its original shape upon 90% compression strain with a small energy dissipation of~0.2, which is lower than that of all the previously reported values (0.3-0.7). It can rebound a steel ball in spring-like fashion with fast recovery speed of~580 mm s −1 (more than four times of the previously reported maximum value) (Fig. 1c). More interestingly, this carbon elastomer also exhibits a high level of fatigue resistance. It can undergo more ...

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Mechanically Robust, Electrically Conductive and Stimuli‐Responsive Binary Network Hydrogels Enabled by Superelastic Graphene Aerogels

Cited by 184 publications

References 48 publications

Silane bonded graphene aerogels with tunable functionality and reversible compressibility

Silane bonded graphene aerogels with tunable functionality and reversible compressibility

Graphene Polymer Nanocomposites for Fuel Cells

Super-carbon spring: a biomimetic design

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