A Review on Graphene Oxide Two-dimensional Macromolecules: from Single Molecules to Macro-assembly

Fang, Wenzhang; Peng, Li; Liu, Yingjun; Wang, Fang; Xu, Zhen; Gao, Chao

doi:10.1007/s10118-021-2515-1

Cited by 35 publications

(27 citation statements)

References 263 publications

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“…Compared with previous dilute solution processing, this new plastic processing method offers higher working accuracy, freedom, and fidelity. [ 2–5 ] Furthermore, the method is also generally applicable to many 2D layered solids, such as conductive graphene derivatives, MXene, and semiconductor MoS 2 (Figure 1f–h, Figures S5–S7, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…[ 1,2 ] Solution processing methods, including casting, spinning and additive manufacturing, [ 2–4 ] have been used to process dilute dispersions into macroscopic forms, such as films, fibers, and aerogels. [ 5 ] The solid content of homogeneous dispersions of 2D sheets is usually restricted to a range from 0.1 to 5.0 wt% due to their high aspect ratio and low affinity with common solvents. During the drying process, these sparse solid networks are too weak to resist compressive capillary stress and exhibit considerable volume shrinkage ratios, up to 1000 (for 0.1 wt% dispersion).…”

Section: Introductionmentioning

confidence: 99%

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Hydroplastic Micromolding of 2D Sheets

et al. 2021

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Processing 2D sheets into desired structures with high precision is of great importance for fabrication and application of their assemblies. Solution processing of 2D sheets from dilute dispersions is a commonly used method but offers limited control over feature size precision owing to the extreme volume shrinkage. Plastic processing from the solid state is therefore a preferable approach to achieve high precision. However, plastic processing is intrinsically hampered by strong interlayer interactions of the 2D sheet solids. Here, a hydroplastic molding method to shape layered solids of 2D sheets with micrometer‐scale precision under ambient conditions is reported. The dried 2D layered solids are plasticized by intercalated solvents, affording plastic near‐solid compounds that enable local plastic deformation. Such an intercalated solvent‐induced hydroplasticity is found in a broad family of 2D materials, for example graphene, MoS2, and MXene. The hydroplastic molding enables fabrication of complex spatial structures (knurling, origami) and microimprinted tubular structures down to diameters of 390 nm with good fidelity. The method enhances the structural accuracy and enriches the structural diversity of 2D macroassemblies, thus providing a feasible strategy to tune their electrical, optical, and other functional properties.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydroplastic Micromolding of 2D Sheets

et al. 2021

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“…(3) Commercial GO usually appears in the form of colloidal dispersion, which can be directly modified into printable inks with low cost. (4) Chemical structure and properties of printed GO structure like C:O ratio and conductivity can be easily regulated by chemically or thermally reducing, rendering GO inks more compatibility to different applications 21 …”

Section: Designing Printable Go Inksmentioning

confidence: 99%

“…Graphene, a single layer two‐dimensional (2D) matter with covalently bonded sp2 carbon hexagonal network, has emerged as a promising material for ESC applications due to its record thermal/electrical conductivity, large surface area, outstanding mechanical properties, and unique optical properties 15–18 . Apart from pristine graphene, graphene oxide (GO), composing of abundant oxygen‐containing groups on its basal plane and edges, is another extensively studied graphene‐based materials owning to its good processibility, tunable functionalization, and easy accessibility 19–21 . The unique structural features and superior properties of graphene and GO allow them to be ideal materials as building blocks for high‐performance ESC devices such as the electrodes of batteries and supercapacitors, 22–25 solar steam generators, 26 and electro‐thermal conversion devices 27 .…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional printing of graphene‐based materials for energy storage and conversion

Jiang

Guo

Liu

et al. 2021

SusMat

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Developing high‐performance energy storage and conversion (ESC) device relies on both the utilization of good constituent materials and rational design of assembly structure. Graphene‐based materials, due to their superior properties like high electrical/thermal conductivity, large surface area, and unique optical properties, have been extensively reported for ESC applications. The emerging three‐dimensional (3D) printing techniques, especially extrusion‐based direct ink writing technique, have brought a revolutionary improvement in structure control accuracy and designing capability to graphene‐based macro‐assemblies, triggering a boost in functionalities and performances of graphene‐based ESC devices. In these circumstances, understanding the very recent progress of 3D‐printed graphene materials and their design philosophy to bring new concepts for material designs and address the requirements for high‐performance ESC devices are urgently important. In this review, we aim to outline recent developments in 3D printing of graphene‐based materials and their applications in ESC applications. Basic requirements and theoretical analysis for preparation printable inks are discussed, as well as feasible GO ink preparation strategies in existing literatures. The representative explorations of 3D‐printed graphene materials in ESC applications like batteries, supercapacitors, solar steam generators, and electro‐thermal conversion are also reviewed. This study attempts to provide a comprehensive overview of the progresses and limitations of present 3D printed graphene materials, and seeks to enlighten the opportunities and orientations of future research in this field.

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“…Polymer morphology is an emerging and rapidly growing branch of materials science 25‐38 . Control of blend morphology at the microscopic scale is critical for optimizing the performance of materials 39‐42 .…”

Section: Introductionmentioning

confidence: 99%

Morphological evolution of self‐assembled PS‐g‐PA6 graft copolymer via in situ polymerization

Liu

Sun

et al. 2021

Polymers for Advanced Techs

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The self‐assembly behaviors of polystyrene graft polyamide‐6 (PS‐g‐PA6) copolymer obtained through incorporation of PA6 and PS segments with exact lengths via in situ polymerization were studied in this work. Copolymers were obtained via the bulk polymerization induced self‐assembly process without any external template or stabilizer. The morphological characteristics of PS‐g‐PA6 copolymer were probed using SEM and TEM techniques. Particular attention was paid to changing the PS‐g‐PA6 morphology from a simple nanospherical to the combined nano/microspherical phase structure by varying the [PA6]/[PS] mass ratio. At a [PA6]/[PS] mass ratio of 80:20, PS‐g‐PA6 copolymer revealed a specific phase structure, where the PS backbones formed a continuous phase and the PA6 side chains ensured the microspheres with dispersed nano‐scale inclusions. The grain diameter of a dispersed PA6 sphere phase was found to be about 75 nm. When the PS backbone mass ratio decreased to 10 wt%, the copolymer structure was self‐assembled into the 1–3 μm large microspheres with uniformly distributed nanospherical particles. A further decrease in the PS backbone content to 5 wt% led to the failure of phase inversion in the copolymers. The main feature of this project is that the structure of the main chain and branch chain of PS‐g‐PA6 copolymer can be reversed. The branched chain forms spherical phase and the main chain forms continuous phase structure. The strategy was proved to be effective to obtain the novel structure of graft copolymer.

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A Review on Graphene Oxide Two-dimensional Macromolecules: from Single Molecules to Macro-assembly

Cited by 35 publications

References 263 publications

Hydroplastic Micromolding of 2D Sheets

Hydroplastic Micromolding of 2D Sheets

Three‐dimensional printing of graphene‐based materials for energy storage and conversion

Morphological evolution of self‐assembled PS‐g‐PA6 graft copolymer via in situ polymerization

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