Hydrogen Passivation Induced Dispersion of Multi‐Walled Carbon Nanotubes

Yang, Yingchao; Xu, Zhi-Hui; Pan, Zhengwei; Li, Xiaodong

doi:10.1002/adma.201104337

Cited by 33 publications

(17 citation statements)

References 36 publications

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“…The following reaction occurs during the HP. Since the bond energy is 347 kJ/mol for C-C, 436.2 kJ/mol for H-H, and 416.3 kJ/mol for C-H, it is clear that additional energy is needed to activate the reaction (1)26. This additional energy is provided by the sound energy produced by the ultrasonication treatment.…”

Section: Discussionmentioning

confidence: 99%

“…New strategies to produce monolayered graphene sheets without destroying their unique structural integrity are in a pressing need. Surface passivation has been proven to be one of most effective methods to disperse multi-walled carbon nanotubes (MWCNTs) in both absolute ethanol and epoxy26. The inlet hydrogen atoms serve as a source of the second atoms to occupy the dangling C-bonds in MWCNTs, forming more stable C-H bonds27.…”

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confidence: 99%

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Enhancing graphene reinforcing potential in composites by hydrogen passivation induced dispersion

Yang

Rigdon

Huang

et al. 2013

Sci Rep

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110

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To take full advantages of the structural uniqueness and exceptional properties of graphene as reinforcement in composites, harvesting well-dispersed graphene is essential. On the other hand, it is challenging to achieve simultaneously high stiffness, strength and toughness in engineered materials because of the trade-off relations between these properties. Here we demonstrate that the graphene reinforcing potential can be significantly enhanced through the excellent dispersion of graphene sheets in the matrix material and the strong graphene-matrix bonding by the coupled hydrogen passivation and ultrasonication technique. The fabricated graphene/epoxy composites exhibit simultaneously remarkable increase in elastic modulus, fracture strength, and fracture energy. We found that the inlet hydrogen atoms in the hydrogen passivation serve as a source of the second atoms to terminate the C dangling bonds and form more stable C-H bonds, separating graphene flakes and promoting the binding with the matrix material.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Enhancing graphene reinforcing potential in composites by hydrogen passivation induced dispersion

Yang

Rigdon

Huang

et al. 2013

Sci Rep

Self Cite

110

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“…Compared to traditional composite materials, nanocomposites exhibit extraordinary properties because of the exceptionally high surface to volume ratio of the nanofiller and/or its exceptionally high aspect ratio 3 . However, nanofillers used in these materials have strong tendency to agglomerate which would cause inhomogeneous dispersion of nanofillers in matrices 11 , and reduction in mechanical and thermal properties of these nanocomposites. In the past few years, polymer nanocomposites with enhanced optical, mechanical, electrical, thermal, and fire retardant properties have been developed [6][7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Epoxy/graphene nanocomposites – processing and properties: a review

2015

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“…This process is rather slow and probably reversed when the sonication stops [64,65]. Last year, Yang and co-workers had demonstrated the use of hydrogen passivation and ultrasonication to uniformly disperse multi-walled carbon nanotubes [66]. It was claimed that the carbon nanotubes/epoxy composite produced using this method has better mechanical properties compared with carbon nanotubes/epoxy composite produced by other methods.…”

Section: Implementation Considerationsmentioning

confidence: 98%