Polymer-stabilized graphene dispersions at high concentrations in organic solvents for composite production

Wajid, Ahmed S.; Das, Sriya; Irin, Fahmida; Ahmed, Hoda S.; Shelburne, John L.; Parviz, Dorsa; Fullerton, Robert J.; Jankowski, Alan F.; Hedden, Ronald C.; Green, Micah J.

doi:10.1016/j.carbon.2011.09.008

Cited by 267 publications

(224 citation statements)

References 59 publications

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“…Note that centrifugation rate was decreased to 2000 rpm due to using lower concentration of NaCMC and therefore lower viscosity of starting solutions. decrease the final graphene concentration in contrary to what was shown previously with polymers [47] or conventional surfactants [28]. We can even see that graphene concentration after 9 h of sonication in 5 mg/ml solution of NaCMC-90k is 2.36 mg/ml which is higher than the concentration of graphene achieved after 10 h of sonication in 10 mg/ml solution of NaCMC-90k (1.82 mg/ml) (see Table 1 composite 1 and 2).…”

Section: Exfoliation Of Graphite To Graphenecontrasting

confidence: 98%

“…4) which is almost equivalent to the decrease of the NaCMC concentration (2.5 times). The results are consistent with observations made in [47] where concentration of graphene correlated with the concentration of exfoliating polymer. So the highest achieved graphene concentration was 4.3 mg/ml after 10 h of sonication time as shown in Fig.…”

Section: Exfoliation Of Graphite To Graphenesupporting

confidence: 92%

“…sodium dodecylbenzene sulfonate (1390 Lg −1 m −1 ) [27]) or polymers (e.g. poly(vinyl pyrrollidone) (1293 Lg −1 m −1 ) [47]). Such difference is most probably caused by influence of stabilizing agents on the optical properties of dispersion (e.g.…”

Section: Exfoliation Of Graphite To Graphenementioning

confidence: 99%

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Graphene/Na carboxymethyl cellulose composite for Li-ion batteries prepared by enhanced liquid exfoliation

Naboka

Yim

Abu-Lebdeh

2016

Materials Science and Engineering: B

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1016/j.mseb.2016.04.003Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Graphene/Na carboxymethyl cellulose composite for Li-ion batteries prepared by enhanced liquid exfoliation Naboka, Olga; Yim, Chae-Ho; Abu-Lebdeh, Yaser http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/droits L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=53b49153-7e23-4e60-9847-41177eef882f http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=53b49153-7e23-4e60-9847-41177eef882f In the present work, we report a sonication-assisted exfoliation method of graphene preparation enhanced by the use of microwave heating and "green" exfoliant -sodium carboxymethyl cellulose (NaCMC). Introducing microwave heating during sonication of graphite dispersions in aqueous solutions of NaCMC results in the formation of graphene dispersions with concentration as high as 4.29 mg/ml. It is found that drying the dispersions results in the formation of graphene/NaCMC composites with graphene content up to 38.65 wt%. A study of the composite with High Resolution Transmission Electron Microscopy and Raman Spectroscopy reveals the formation of few-layer graphene approximately below five layers. The as-prepared graphene/NaCMC composite shows higher capacities than commercial graphite in Li-ion half cells reaching 397 mAh/g (graphene) . Also, when the composite is used with a nanosilicon (33 wt%) in a Li-ion half cell high initial reversible capacities of 1611 mAh/g (Si) with good cyclability and rate capability have been reached.

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Section: Exfoliation Of Graphite To Graphenecontrasting

confidence: 98%

Section: Exfoliation Of Graphite To Graphenesupporting

confidence: 92%

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Graphene/Na carboxymethyl cellulose composite for Li-ion batteries prepared by enhanced liquid exfoliation

Naboka

Yim

Abu-Lebdeh

2016

Materials Science and Engineering: B

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“…An alternative way to improve cg is to use stabilizing reagents (SRs) [13][14][15][16][17]. This strategy can also greatly expand the range of solvents used for the exfoliation of graphite, even in aqueous solutions [18].…”

Section: Introductionmentioning

confidence: 99%

“…This strategy can also greatly expand the range of solvents used for the exfoliation of graphite, even in aqueous solutions [18]. Typical SRs include alkylated compounds with different functional groups [13][14][15], polymers [16] and porphyrin derivatives [17]. For the alkylated compounds attempted up to now, the molecular structures are limited, i.e., only molecule bearing one aliphatic chain has been tried.…”

Section: Introductionmentioning

confidence: 99%

Thermo-responsive graphene dispersions by liquid phase exfoliation of graphite aided by an alkylated Percec monodendron

et al. 2017

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Large-scale production of graphene and subsequent sample engineering is the key for fully-realizing the potential applications proposed to this intriguing two-dimensional nanomaterial. Herein, smart graphene dispersions with low defects and thermo-responsive properties can be obtained by liquid phase exfoliation of graphite using an alkylated Percec monodendron (3,4,5-trioctadecyloxybenzaldehyde, 1) as the stabilizing reagent. By simply changing the temperature, the dispersed graphene and 1 can be detached, leading to the recovery of both components. Besides noncovalent wrapping, the stabilizing reagent 1 can be also covalently attached to graphene through [3+2] cycloaddition. The covalently functionalized graphene sheets show improved dispersibility in organic solvents compared to the pristine graphene, which opens the door for their applications in various polymer matrixes. The strategy demonstrated here provides a new methodology to get smart graphene dispersions with multiple functions.

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Surface Modification of Graphene

Kuila¹,

Banerjee²,

Murmu³

2013

Advanced Carbon Materials and Technology

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Polymer-stabilized graphene dispersions at high concentrations in organic solvents for composite production

Cited by 267 publications

References 59 publications

Graphene/Na carboxymethyl cellulose composite for Li-ion batteries prepared by enhanced liquid exfoliation

Graphene/Na carboxymethyl cellulose composite for Li-ion batteries prepared by enhanced liquid exfoliation

Thermo-responsive graphene dispersions by liquid phase exfoliation of graphite aided by an alkylated Percec monodendron

Surface Modification of Graphene

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