Functionalization of carbon nanofibers through electron beam irradiation

Evora, Maria Cecilia; Klosterman, Donald A.; Lafdi, Khalid; Li, Lingchuan; Abot, Jandro L.

doi:10.1016/j.carbon.2010.02.012

Cited by 25 publications

(14 citation statements)

References 37 publications

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“…They have been heat‐treated at temperatures of 1500°C. PR 25 PS XT fibers, with an average bulk density of product of 0.008–0.0056 g/cm 3 and an outer layer consisting on a disordered pyrolytically stripped layer with a large number of graphitic edge sites available along the length, have an average diameter of 120 nm and have been heat‐treated at temperatures of 600°C. The three types of CNFs have lengths ranging from 50 to 100 µm, and their thermal conductivity can be inferred to be 2000 W/m‐K…”

Section: Methodsmentioning

confidence: 99%

Enhanced thermal conductivity of rheologically percolated carbon nanofiber reinforced polypropylene composites

Paleo

García

Arboleda-Clemente

et al. 2015

Polymers for Advanced Techs

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Three different types of carbon nanofibers (CNF) were incorporated in the same polypropylene (PP) matrix by twin-screw extrusion. The rheological and thermal properties were investigated. The rheological characterization of CNFs/PP composites as function of their volume fraction shows different microstructures: percolated and non-percolated behaviors of their CNF's networks. In this work, the laser flash technique is employed in the experimental determination of the thermal diffusivity and conductivity of composites at room temperature. The ultimate aim is to correlate microstructure described by rheological analysis with final thermal properties. The results show that thermal diffusivity and conductivity are clearly higher for rheologically percolated composites suggesting that above certain critical content of nanofibers thermal transport is mainly controlled by percolated structures caused by interconnected CNFs' networks. Finally, thermal conductivity results are described by means of percolation theory from which an intrinsic thermal conductivity for the CNFs' network of approximately 6.5 W/ m K, i.e. close to three times lower than some values reported in literature for SWCNTs' networks, was calculated.

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Section: Methodsmentioning

confidence: 99%

Enhanced thermal conductivity of rheologically percolated carbon nanofiber reinforced polypropylene composites

Paleo

García

Arboleda-Clemente

et al. 2015

Polymers for Advanced Techs

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show abstract

“…Absorption of electrons in the range of 100 keV to 10 MeV leads to production of secondary electrons via energy loss and collision processes, further producing ions and free radicals in the target material. Hence, the overall effect of the electron bombardment is related to the energy loss due to electron scattering and its dissipation as heat [34,35]. In carbon materials, e.g.…”

Section: Particle Structure and Modificationmentioning

confidence: 99%

“…The electron bombardment induces vacancies by dangling bond saturation. This process allows for the welding of SWNT, MWNTS and carbon fibers [34,38]. Besides SW defect, Frenkel pairs have recently been pointed out as relevant to high-energy e-beam irradiation of carbon nanostructures [39,40].…”

Section: Particle Structure and Modificationmentioning

confidence: 99%

Carbon black reborn: Structure and chemistry for renewable energy harnessing

Khodabakhshi

Fulvio

Andreoli

2020

Carbon

177

104

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Carbon Black (CB) is one of the most abundantly produced carbon nanostructured materials, and approximately 70% of it is used as pigment and as reinforcing phase in rubber and plastics. Recent scientific findings report on other uses of CB that are of current interest, such as renewable energy harvesting and carbon capture. The present review focuses on the use and role of CB in renewable and environmental applications relevant to contemporary global challenges focusing specifically on clean energy. Key and recent research on the structure and chemistry of CB, including its uses as precursors to graphene quantum dots and hollow carbon spheres, is discussed in relation to renewable energy devices, electrochemical energy storage and environmental remediation. The surface chemistry of CB is closely related to that of graphitic and of turbostratic carbons through the predominant hexagonal carbon lattice from graphene fragments forming its basic structural units. Consequently, modern methods for grafting polymers and functional groups are easily translated to this abundant nanostructured material. Moreover, recent advances in electron microscopy that probe the structure of CB, and its electronic and physicochemical properties in nanocomposites revived the attention of what is wrongfully considered as a scientifically uninspiring material with limited potential for future technology breakthrough. CB has the potential to surge as a key player in renewable energy and environmental applications, meaning "When Black Turns Green".

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“…High energy methods can be used for oxidation of CNT as well. For example, [119][120][121] the ball mill and high energy radiation method were studied. The advantage of high energy methods is that a large amount of materials can be modified and the method can also be applied to other materials such as graphene, h-BN (hexagonal boron nitride), BNNT, etc.…”

Section: Modification Of Nanotubesmentioning

confidence: 99%

http://www.espublisher.com/journals/articledetails/115/

Liu¹,

Fang²,

Wang³

et al. 2019

ES Mater.Manuf.

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As an interesting and important material, carbon nanotube (CNT) and boron nitride nanotube (BNNT) have been widely used in various applications such as electrical conductor, thermal management, catalyst, sensing, energy harvest and storage, tissue engineering, drug delivery, bio-imaging and cancer therapy. The special size, geometry, aspect ratio, chemical composition and electronic structure endow them the unique properties. Nanotube basics for CNT and BNNT will be covered in this review, such as structures, properties and synthesis methods.

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Functionalization of carbon nanofibers through electron beam irradiation

Cited by 25 publications

References 37 publications

Enhanced thermal conductivity of rheologically percolated carbon nanofiber reinforced polypropylene composites

Enhanced thermal conductivity of rheologically percolated carbon nanofiber reinforced polypropylene composites

Carbon black reborn: Structure and chemistry for renewable energy harnessing

http://www.espublisher.com/journals/articledetails/115/

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