Lignin-assisted direct exfoliation of graphite to graphene in aqueous media and its application in polymer composites

Liu, Wanshuang; Zhou, Rui; Zhou, Dan; Ding, Guoqiang; Soah, Jie Miin; Yue, Chee Yoon; Lu, Xuehong

doi:10.1016/j.carbon.2014.11.036

Cited by 136 publications

(92 citation statements)

References 36 publications

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“…Water, the "natural" solvent, has γ ≈72 mJ m −2 , 23 which is too high (≈30 mJ m −2 greater than NMP) for dispersing graphene and graphite. 24 However, by adding charged DSAs, such as pyrenes [25][26][27][28] or polymers [29][30][31][32][33] , exfoliation in water can be accomplished. 13,15 Nevertheless, waterbased dispersions may not be suitable for all applications.…”

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confidence: 99%

Liquid-Phase Exfoliation of Graphite into Single- and Few-Layer Graphene with α-Functionalized Alkanes

Haar

Bruna

Lian

et al. 2016

J. Phys. Chem. Lett.

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Graphene has unique physical and chemical properties, making it appealing for a number of applications in optoelectronics, sensing, photonics, composites, and smart coatings, just to cite a few. These require the development of production processes that are inexpensive and up-scalable. These criteria are met in liquid-phase exfoliation (LPE), a technique that can be enhanced when specific organic molecules are used. Here we report the exfoliation of graphite in N-methyl-2-pyrrolidinone, in the presence of heneicosane linear alkanes terminated with different head groups. These molecules act as stabilizing agents during exfoliation. The efficiency of the exfoliation in terms of the concentration of exfoliated single- and few-layer graphene flakes depends on the functional head group determining the strength of the molecular dimerization through dipole-dipole interactions. A thermodynamic analysis is carried out to interpret the impact of the termination group of the alkyl chain on the exfoliation yield. This combines molecular dynamics and molecular mechanics to rationalize the role of functionalized alkanes in the dispersion and stabilization process, which is ultimately attributed to a synergistic effect of the interactions between the molecules, graphene, and the solvent.

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confidence: 99%

Liquid-Phase Exfoliation of Graphite into Single- and Few-Layer Graphene with α-Functionalized Alkanes

Haar

Bruna

Lian

et al. 2016

J. Phys. Chem. Lett.

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“…Typically, in most cases, graphene converts into graphene oxide in contact with oxygen as a result of transition of sp 2 carbon atoms into sp 3 state that impairs the electrical properties of materials [21,22]. Conversion of graphene to graphene oxide is an irreversible process, and it is impossible to return an original structure and the electrical properties by reduction, the product of which is called a reduced graphene oxide [23].…”

Section: Introductionmentioning

confidence: 99%

“…For example, exfoliation of graphene sheets was carried out in the aqueous solutions of alkaline lignin [22], sodium dodecyl sulfate [29], and sodium dodecylbenzene sulfonate [13], as well as in organic solutions of imidazole [30], 1-pyrenecarboxylic acid [31], dimethylformamide [32], mixture of benzene and hexafluorobenzene [16], or heptane [33], as well as the products of polymerization of styrene and divinylbenzene [34].…”

Section: Introductionmentioning

confidence: 99%

Sonochemical Preparation and Subsequent Fixation of Oxygen‐Free Graphene Sheets at N,N‐Dimethyloctylamine‐Aqua Boundary

Trusova

Kotsareva

Кириченко

et al. 2018

Advances in Materials Science and Engineering

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In this study, the syntheses of oxygen-free graphene sheets and the method of its fixation at an oil-aqua interface were presented. e graphene sheets were prepared by exfoliation of synthetic graphite powder in an aqua-organic medium under ultrasound irradiation. N,N-Dimethyloctylamine-(DMOA-) aqua emulsion was used as the liquid medium, and pH was equal to 3. e obtained graphene nanosuspension was fractionated by sedimentation and decanted according to the weight. e graphene nanoparticle fractions, differing in configuration and number of layers, have been characterized using transmission electron microscopy (TEM), electron diffraction, HRTEM, Raman spectroscopy, and electron energy loss spectroscopy (EELS). It was found that using a DMOA-aqua mixture as the liquid medium in ultrasonic treatment of synthetic graphite leads to the formation of oxygen-free 1-2-layer graphene sheets attached to the DMOA-aqua interface. e proposed method differs from known ones by using a small amount of more environmentally friendly organic substances. It allows to obtain large quantities of oxygen-free graphene, and finally unconverted graphite can be directed for reuse. e proposed method allows to obtain both 2D graphene sheets with micron linear dimensions and 3D packages with a high content of defects. Both these species are in demand in areas related to the development of new materials with unique electrophysical properties.

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“…Alkali lignins and its degradation products in SPBL are a renewable resource with the highest natural carbon content, high dispersion and surface activity, which is an ideal precursor for biomass carbon materials. Lignin structure contains different functional groups such as phenolic hydroxyl groups, carboxylic acid groups, sulfonate groups, ether-bridges and methoxyl groups, and trace elements such as Si and S (Fig.1c) [7,8]. These highly hydrophilic groups can provide lone pair electrons and nucleation sites, adsorb metal ions and lead to the cross-linking reaction of lignins to form stable cross-linked structures (Fig.1d,e).…”

Section: Introductionmentioning

confidence: 99%

Graphene-like carbon sheet/Fe3O4 nanocomposites derived from soda papermaking black liquor for high performance lithium ion batteries

Zhang

et al. 2017

Electrochimica Acta

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like carbon sheet/Fe3O4 nanocomposites derived from soda papermaking black liquor for high performance lithium ion batteries, Electrochimica Acta http://dx.doi.org/10. 1016/j.electacta.2017.02.130 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. . Even at a high current density (1000 mA g -1 ), it still exhibits a high reversible capacity (750 mAh g -1 ) after 1400 discharge/charge cycles. More importantly, the removal efficiency of chemical oxygen demand of SPBL is up to 83.4% during the synthesis process, which reduce its load to environment and synthetic cost of carbon-based nanocomposite anodes.

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Lignin-assisted direct exfoliation of graphite to graphene in aqueous media and its application in polymer composites

Cited by 136 publications

References 36 publications

Liquid-Phase Exfoliation of Graphite into Single- and Few-Layer Graphene with α-Functionalized Alkanes

Liquid-Phase Exfoliation of Graphite into Single- and Few-Layer Graphene with α-Functionalized Alkanes

Sonochemical Preparation and Subsequent Fixation of Oxygen‐Free Graphene Sheets at N,N‐Dimethyloctylamine‐Aqua Boundary

Graphene-like carbon sheet/Fe3O4 nanocomposites derived from soda papermaking black liquor for high performance lithium ion batteries

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