A water-based green approach to large-scale production of aqueous compatible graphene nanoplatelets

Ding, Jiheng; Zhao, Hongran; Yu, Haibin

doi:10.1038/s41598-018-23859-5

Cited by 65 publications

(29 citation statements)

References 36 publications

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“…The sharp diffraction peak at 26.5° of graphite was the (002) reflection peak, suggesting the graphite plane composed of well ordered graphenes with an interlayer spacing of 3.35 Å. A diffraction peak at ~10.8° was observed in GO, which was related to the existence of functional groups on the surface of GO 22 . For the XRD spectrum of bGO, no clearly visible peak can be observed, indicating the sheets stack together in a looser way caused the decreased size of sp 2 bonded crystalline domains after BFDE functionalization 23 .…”

Section: Resultsmentioning

confidence: 95%

Variation of mechanical and thermal properties in sustainable graphene oxide/epoxy composites

Zhao

Ding

2018

Sci Rep

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In this work, the functional graphene oxide (bGO) was facilely synthesized through a grafted reaction between graphene oxide (GO) and bio-based bis-furan di-epoxide (BFDE). The structure of bGO was confirmed by FTIR spectra and Raman spectra. The properties of polymer composite materials depend on the distribution of the nanofiller in the matrix and due to the presence of polymer chains our bGO sheets exhibit a better dispersibility in solvents and polymer matrix, which provides a potential opportunity for the preparation of BFDE composites with excellent performance. Bio-based BFDE composites containing 0.05–0.5 wt.% of bGO exhibit superior mechanical and thermal properties. The addition of just 0.5 wt% such bGO to an BFDE causes 80%, 49%, 21%, 69% and 97% enhancement in tensile strength, flexural strength, flexural modulus, critical stress intensity factor and critical strain energy release rate, respectively. The thermal decomposition temperature Td of bGO/BFDE composites was increased about ~17 °C compared to blank BFDE sample. In addition, we found that introducing unmodified GO to epoxy matrix lead to an insignificant increase of the thermal property of the resulting GO/BFDE composites. The enhanced mechanical properties and thermal properties of bGO/BFDE composites could be attributed to strong interfacial interactions and high affinity between bGO and epoxy matrix.

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Section: Resultsmentioning

confidence: 95%

Variation of mechanical and thermal properties in sustainable graphene oxide/epoxy composites

Zhao

Ding

2018

Sci Rep

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“…More importantly, this method is promising for preparing various bulk-layered materials. The graphite pretreated by vapor can be used to product the edge hydroxylated graphene nanosheets in pure water without the addition of any surfactants or polymers by sonication-assisted liquid-phase exfoliation ( Figure 24 ) [ 117 ]. The concentration of stable graphene dispersion arrived up to ~0.55 mg mL −1 .…”

Section: Media Of Liquid-phase Exfoliationmentioning

confidence: 99%

“… Schematic illustration of the exfoliation process. Reproduced from [ 117 ]. Copyright Nature Publishing Group, 2018.…”

Section: Figurementioning

confidence: 99%

Liquid-Phase Exfoliation of Graphene: An Overview on Exfoliation Media, Techniques, and Challenges

et al. 2018

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Graphene, a two-dimensional (2D) carbon nanomaterial, has attracted worldwide attention owing to its fascinating properties. One of critical bottlenecks on some important classes of applications, such as printed electronics, conductive coatings, and composite fillers, is the lack of industrial-scale methods to produce high-quality graphene in the form of liquid suspensions, inks, or dispersions. Since 2008, when liquid-phase exfoliation (LPE) of graphene via sonication was initiated, huge progress has been made in the past decade. This review highlights the latest progress on the successful preparation of graphene in various media, including organic solvents, ionic liquids, water/polymer or surfactant solutions, and some other green dispersants. The techniques of LPE, namely sonication, high-shear mixing, and microfluidization are reviewed subsequently. Moreover, several typical devices of high-shear mixing and exfoliation mechanisms are introduced in detail. Finally, we give perspectives on future research directions for the development of green exfoliation media and efficient techniques for producing high-quality graphene. This systematic exploratory study of LPE will potentially pave the way for the scalable production of graphene, which can be also applied to produce other 2D layered materials, such as BN, MoS2, WS2, etc.

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“…Additionally, the dispersions have good quality graphene flakes with an average of three-layered graphene with a lateral size of 1 µm. Ding et al [ 70 ] explained a water-based “green” approach for the preparation of stable aqueous-compatible graphene nanoplatelets. Graphite nanosheets were dispersed into DMF and exfoliated by ball milling, resulting in graphene sheets with three layers and a thickness of about 0.8–1.8 nm [ 71 ].…”

Section: Stable Graphene Dispersions Using Solventsmentioning

confidence: 99%

Recent Studies on Dispersion of Graphene–Polymer Composites

2021

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Graphene is an excellent 2D material that has extraordinary properties such as high surface area, electron mobility, conductivity, and high light transmission. Polymer composites are used in many applications in place of polymers. In recent years, the development of stable graphene dispersions with high graphene concentrations has attracted great attention due to their applications in energy, bio-fields, and so forth. Thus, this review essentially discusses the preparation of stable graphene–polymer composites/dispersions. Discussion on existing methods of preparing graphene is included with their merits and demerits. Among existing methods, mechanical exfoliation is widely used for the preparation of stable graphene dispersion, the theoretical background of this method is discussed briefly. Solvents, surfactants, and polymers that are used for dispersing graphene and the factors to be considered while preparing stable graphene dispersions are discussed in detail. Further, the direct applications of stable graphene dispersions are discussed briefly. Finally, a summary and prospects for the development of stable graphene dispersions are proposed.

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A water-based green approach to large-scale production of aqueous compatible graphene nanoplatelets

Cited by 65 publications

References 36 publications

Variation of mechanical and thermal properties in sustainable graphene oxide/epoxy composites

Variation of mechanical and thermal properties in sustainable graphene oxide/epoxy composites

Liquid-Phase Exfoliation of Graphene: An Overview on Exfoliation Media, Techniques, and Challenges

Recent Studies on Dispersion of Graphene–Polymer Composites

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