The chemical functionalization of graphene nanoplatelets through solvent-free reaction

Cunha, Eunice; He, Rujie; Lin, Fei; Kinloch, Ian A.; Sun, Qiang; Fan, Zhengfu; Young, Robert J.

doi:10.1039/c8ra04817g

Cited by 19 publications

(14 citation statements)

References 52 publications

(54 reference statements)

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“…Graphene nanoplatelets (GNP) are usually produced by the intercalation of graphite through various means, followed by an acid purification process, and further exfoliation of the initial GNP flakes [9]. Besides intercalation, irradiation with microwaves, or extreme heating is also sometimes used to produce GNP from the host graphite source [10].…”

Section: Methodsmentioning

confidence: 99%

Raman Spectroscopy of Graphene, Graphite and Graphene Nanoplatelets

Casimir¹,

Alghamdi²,

Ahmed³

et al. 2019

2D Materials

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The theoretical simplicity of sp 2 carbons, owing to their having a single atomic type per unit cell, makes these materials excellent candidates in quantum chemical descriptions of vibrational and electronic energy levels. Theoretical discoveries, associated with sp 2 carbons, such as the Kohn anomaly, electron-phonon interactions, and other exciton-related effects, may be transferred to other potential 2D materials. The information derived from the unique Raman bands from a single layer of carbon atoms also helps in understanding the new physics associated with this material, as well as other two-dimensional materials. The following chapter describes our studies of the G, D, and G′ bands of graphene and graphite, and the characteristic information provided by each material. The G-band peak located at ~1586 cm −1 , common to all sp 2 carbons, has been used extensively by us in the estimation of thermal conductivity and thermal expansion characteristics of the sp 2 nanocarbon associated with single walled carbon nanotubes (SWCNT). Scanning electron microscope (SEM) images of functionalized graphene nanoplatelet aggregates doped with argon (A), carboxyl (B), oxygen (C), ammonia (D), fluorocarbon (E), and nitrogen (F), have also been recorded and analyzed using the Gwyddion software.

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Section: Methodsmentioning

confidence: 99%

Raman Spectroscopy of Graphene, Graphite and Graphene Nanoplatelets

Casimir¹,

Alghamdi²,

Ahmed³

et al. 2019

2D Materials

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“…The carboxyl-methyl-pyrrolidine-functionalized GNP (f-GNP, scheme 1) was functionalized according a procedure described in our previous work [25,26]. The f-GNP-Si was prepared as follows: APTMS (2.0 ml) was added to a suspension of f-GNP (3.0 g) in chloroform (200 ml).…”

Section: Functionalization Of the Graphene Nanoplateletsmentioning

confidence: 99%

“…The first step involves the functionalization of the GNP through 1, 3-dipolar cycloaddition reaction leading to the formation of carboxyl-methyl-pyrrolidine-functionalized GNPs (f-GNP, scheme 1). The detailed characterization of these functionalized GNP is described in references [25,26]. The second step involves the reaction of the carboxylic acid functional groups of the f-GNP with a silane coupling agent APTMS to obtain the f-GNP-Si (scheme 1).…”

Section: Silane-functionalized Graphenementioning

confidence: 99%

“…Typically, GO or rGO is used as a precursor for further reactions with silane coupling agents [17][18][19][20]22]. In this work, a different approach was used as first step involving the introduction of carboxyl functionalities to the surface of the GNP, through a solvent-free reaction, according our previous work [25,26]. The second step comprised the reaction of those carboxyl functionalities with (3-aminopropyl)-trimethoxysilane (APTMS).…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Silane-functionalized graphene nanoplatelets for silicone rubber nanocomposites

Cunha

et al. 2022

J Mater Sci

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Silane-functionalized graphene nanoplatelets (GNPs) were prepared using a newly developed approach based upon a simple two-step strategy. The effect of their dispersion and interfacial bonding on the mechanical properties and thermal conductivity of reinforced silicone rubber (SR) was investigated. It was found by Raman mapping that the silane-functionalized GNPs could be dispersed uniformly into the SR matrix, leading to an increase of up to 25% in Young’s modulus at only 2 parts per hundred rubber (phr) loading and a considerable enhancement of up to 150% in the thermal conductivity at 5-phr loading. Both the Young’s modulus and thermal conductivity experimental results were found to be in agreement with the values predicted using theoretical models. Graphical abstract

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“…Our group has recently studied the solvent-free 1,3-DCA reaction of GNPs with IDA and PFA, by which time-efficient and scalable functionalization of GNPs can be realized. 30 The determination of functionality is important for the surface modication of GNPs, especially where further quantitative reactions or functional group density sensitivity studies are to be performed. Considering the insoluble nature of GNPs and their derivatives in common solvents, Boehm titration can be applied as an effective method for characterizing the oxygencontaining functional groups of f-GNPs.…”

Section: Introductionmentioning

confidence: 99%