A Generic Organometallic Approach toward Ultra-Strong Carbon Nanotube Polymer Composites

Blake, Rowan; Gun’ko, Yurii K.; Coleman, Jonathan N.; Cadek, Martin; Fonseca, A.; Nagy, J.B.; Blau, Werner J.

doi:10.1021/ja0474805

Cited by 232 publications

(163 citation statements)

References 18 publications

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“…This should give good stress transfer and hence significant reinforcement. 17 In addition, because significant energy would be required to disentangle the grafted chains form the matrix, one might expect the toughness to be increased. However we note that for entanglement to occur, the enthalpy of mixing of the grafted polymer and matrix must be extremely low.…”

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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“…Various methods to provide this repulsive potential have been explored. Nanotubes have been dispersed and stabilised with the aid of specific solvents [16][17][18][19][20][21][22][23][24] , acids [25,26] , macromolecules [27][28][29][30] and surfactants [31][32][33][34] as well as through covalent functionalisation strategies [35,36] . Such systems have been characterised by a range of techniques such as atomic force microscopy [37] , infra-red photoluminescence and absorbance spectroscopy [34] , viscometry [25] , small angle neutron scattering [32] to name but a few.…”

Section: Introductionmentioning

confidence: 99%

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Coleman

2009

Adv Funct Materials

604

536

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Many applications of carbon nanotubes require the exfoliation of the nanotubes to give individual tubes in the liquid phase. This requires the dispersion, exfoliation and stabilisation of nanotubes in a variety of liquids. In this paper we review recent work in this area, focusing on results from the author's group. We begin by reviewing stabilisation mechanisms before exploring research into the exfoliation of nanotubes in solvents, by using surfactants or biomolecules and by covalent attachment of molecules.The concentration dependence of the degree of exfoliation in each case will be highlighted. In addition we will discuss research into the dispersion mechanism for each dispersant type. Most importantly we have compared dispersion quality metrics for all dispersants. From this analysis, we conclude that functionalised nanotubes can be exfoliated to the greatest degree. Finally, we review the extension of this work to the liquid phase exfoliation of graphite to give graphene.

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“…The attachment of functional groups can be used to tailor the interactions of nanomaterials with their environment [6,7] . In particular, the attachment of 35 side-groups to inherently conducting polymer (ICP) nanostructures means that functionalities are anchored to a redox active low dimensional organic conductor.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterisation of controllably functionalised polyaniline nanofibres

et al. 2009

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15A novel method for functionalising solution based polyaniline (PAni) nanofibres is reported whereby the degree of side-chain attachment can be controllably altered. The covalent attachment of functional side-groups to the surface of PAni nanostructures is achieved by post-polymerisation reflux in the presence of a nucleophile and the functionalised nanomaterial can be purified by simple centrifugation. The technique is therefore easily scalable. We demonstrate that control over the extent of side-chain attachment can be achieved simply by altering the amount of 20 nucleophile added during reflux. We provide evidence that covalently attached carboxlate side-chains influence the doping mechanism of polyaniline and can be used to introduce self-doping behaviour. Acid functionalised nanofibres remain redox active and retain their optical switching capabilities in response to changes in the local chemical environment, thus making them suitable for adaptive sensing applications.

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A Generic Organometallic Approach toward Ultra-Strong Carbon Nanotube Polymer Composites

Cited by 232 publications

References 18 publications

Covalently Functionalized Hexagonal Boron Nitride Nanosheets by Nitrene Addition

Covalently Functionalized Hexagonal Boron Nitride Nanosheets by Nitrene Addition

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Synthesis and characterisation of controllably functionalised polyaniline nanofibres

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