Graphene-based polymer nanocomposites

Potts, Jeffrey R.; Dreyer, Daniel R.; Bielawski, Christopher W.; Ruoff, Rodney S.

doi:10.1016/j.polymer.2010.11.042

Cited by 2,845 publications

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“…This is equivalent to a rate of increase of d/dM f  18 GPa, comparable to the best graphene-polymer composites. [21][22][23] Again the fact that both composites display similar strengths suggests that the interfacial shear strength is not improved by the polymer grafting. However, we note that the ductility for both polymer and h-BN reinforced polymer are similar at 7-8%.…”

Section: Figure 2 Ftir Spectra Of A) Pristine H-bn B) Methoxybenzylmentioning

confidence: 99%

Covalently Functionalized Hexagonal Boron Nitride Nanosheets by Nitrene Addition

Sainsbury

Satti

May

et al. 2012

Chemistry A European J

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Exfoliated h-BN nanosheets were covalently functionalized via a one-step nitrene addition using azide precursor molecules. Functionalized h-BN nanosheets were found to exhibit markedly enhanced dispersability relative to pristine h-BN in a range of organic solvents. Extension of the functionalization methodology allowed the covalent attachment of polymer chains to the surface of h-BN nanosheets. Polymer nanocomposites were prepared using the molecularly-functionalized h-BN nanosheets within a polycarbonate (PC) matrix, while h-BN nanosheets functionalized with poly(bisphenol A-co-epichlorohydrin) (PBCE) chains were employed within a PBCE matrix. In both cases the mechanical properties were studied. Significant increases in moduli, strength and ductility of the functionalized h-BN nanocomposites indicated enhanced reinforcement of the functionalized h-BN filler materials over pristine h-BN. The implications of tuning the surface chemistry of exfoliated nanosheets exactly to the chemistry of a host polymer matrix are considered.Due to its exciting electrical, thermal and mechanical properties, 1 the last few years have seen a surge of interest in the exfoliation of graphene. 2,3 More recently, attention has shifted to other layered compounds, notably hexagonal boron nitride (h-BN) and the transition metal dichalcogenides. [4][5][6]

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Section: Figure 2 Ftir Spectra Of A) Pristine H-bn B) Methoxybenzylmentioning

confidence: 99%

Covalently Functionalized Hexagonal Boron Nitride Nanosheets by Nitrene Addition

Sainsbury

Satti

May

et al. 2012

Chemistry A European J

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“…For the last half decade, among several chemical reductants 4,5 , hydrazine has been the most commonly used reductant due to its ease of use (for example, via a one-pot synthesis in either liquid or gas phase) and its ability to achieve a high degree of reduction of graphene oxide without the need for further treatment 3,[6][7][8] . Hydrazine-treated graphene oxide (chemically reduced graphene oxide, 'CReGO') 3 is one of the most promising graphene-based materials for several applications, such as polymer composites, ultracapacitors, rechargeable batteries, chemical/biosensors and thin films [9][10][11][12][13][14] . A large fraction of the oxygen-based functional groups of graphene oxide are removed by exposure to hydrazine; however, the resulting graphene materials contain a small amount of O and N atoms (with approximate C/O and C/N ratios of 10 and 22, respectively) 3,6 .…”

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confidence: 99%

“…However, despite the use of CReGO in a variety of different ways [9][10][11] , the chemical identities of the functional groups containing those heteroatoms have not yet been fully determined. 13 C solid-state nuclear magnetic resonance (SSNMR) spectroscopy may be the most powerful method to study the detailed chemical structures of graphene-based materials such as graphene oxide, GO, reduced graphene oxide and other chemically modified graphenes (CMGs) 16,17 . However, the low natural abundance (1.1%) of the 13 C isotope results in a low signal-to-noise ratio, which, along with the broad peaks typically observed from CMGs, precludes the use of multidimensional SSNMR.…”

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confidence: 99%

“…13 C solid-state nuclear magnetic resonance (SSNMR) spectroscopy may be the most powerful method to study the detailed chemical structures of graphene-based materials such as graphene oxide, GO, reduced graphene oxide and other chemically modified graphenes (CMGs) 16,17 . However, the low natural abundance (1.1%) of the 13 C isotope results in a low signal-to-noise ratio, which, along with the broad peaks typically observed from CMGs, precludes the use of multidimensional SSNMR. This was the motivation for our recent work, which used 99% 13 C-labelled graphite made by chemical vapour deposition (CVD) as the precursor to 13 C-labelled GO, which was studied using 13 C SSNMR 18,19 .…”

mentioning

confidence: 99%

“…However, the low natural abundance (1.1%) of the 13 C isotope results in a low signal-to-noise ratio, which, along with the broad peaks typically observed from CMGs, precludes the use of multidimensional SSNMR. This was the motivation for our recent work, which used 99% 13 C-labelled graphite made by chemical vapour deposition (CVD) as the precursor to 13 C-labelled GO, which was studied using 13 C SSNMR 18,19 . This investigation revealed that hydroxyl, 1,2-epoxide and sp 2 carbons on the basal planes 20 are directly bonded to each other in GO.…”

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Chemical structures of hydrazine-treated graphene oxide and generation of aromatic nitrogen doping

et al. 2012

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Chemically modified graphene platelets, produced via graphene oxide, show great promise in a variety of applications due to their electrical, thermal, barrier and mechanical properties. understanding the chemical structures of chemically modified graphene platelets will aid in the understanding of their physical properties and facilitate development of chemically modified graphene platelet chemistry. Here we use 13 C and 15 n solid-state nuclear magnetic resonance spectroscopy and X-ray photoelectron spectroscopy to study the chemical structure of 15 nlabelled hydrazine-treated 13 C-labelled graphite oxide and unlabelled hydrazine-treated graphene oxide, respectively. These experiments suggest that hydrazine treatment of graphene oxide causes insertion of an aromatic n 2 moiety in a five-membered ring at the platelet edges and also restores graphitic networks on the basal planes. Furthermore, density-functional theory calculations support the formation of such n 2 structures at the edges and help to elucidate the influence of the aromatic n 2 moieties on the electronic structure of chemically modified graphene platelets.

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Graphene Functionalization for Polymer Nanocomposites

Salavagione

Quiles-Díaz

Shuttleworth

et al. 2020

Encyclopedia of Polymer Science and Technology

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Polymer nanocomposites represent one of the most important application materials of this century, and those based on the incorporation of graphene and related materials are at the forefront. This article describes the salient features of nanomaterials from the graphene family and describes in detail recent advances in the strategies employed to successfully incorporate them into polymer matrices for the development of a new generation of materials with superior and tunable properties.

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Graphene-based polymer nanocomposites

Cited by 2,845 publications

References 275 publications

Covalently Functionalized Hexagonal Boron Nitride Nanosheets by Nitrene Addition

Covalently Functionalized Hexagonal Boron Nitride Nanosheets by Nitrene Addition

Chemical structures of hydrazine-treated graphene oxide and generation of aromatic nitrogen doping

Graphene Functionalization for Polymer Nanocomposites

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