Mechanical properties of vapor grown carbon nanofibers

Ozkan, Tanil; Naraghi, Mohammad; Chasiotis, Ioannis

doi:10.1016/j.carbon.2009.09.011

Cited by 129 publications

(74 citation statements)

References 10 publications

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“…Interest in CNT reinforcement stems from the phenomenal physical properties reported in the literature, with Young's Modulus for MWCNTs ranging from 0.8 TPa [12] to 1.8 TPa [13] and strength from 10 GPa [14] to 150 GPa [12]. Although CSCNFs are similarly stiff, they achieve only a fraction of this strength because tensile failure only entails the sliding of the graphene cups (truncated cones) rather than the breaking of any chemical bonds [15]. Attempts have also been made to grow CNTs directly onto alumina fibres which were subsequently soaked in an epoxy resin and cured.…”

Section: Introductionmentioning

confidence: 99%

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

Falzon¹,

Hawkins

Huynh

et al. 2013

Composite Structures

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A novel approach for introducing aligned multi-walled carbon nanotubes (MWCNTs) in a carbon-fibre composite pre-impregnated (prepreg) laminate, to improve the through-thickness fracture toughness, is presented. Carbon nanotube (CNT) 'forests' were grown on a silicon substrate with a thermal oxide layer, using a chemical vapour deposition (CVD) process. The forests were then transferred to a pre-cured laminate interface, using a combination of pressure and heat, while maintaining through-thickness CNT alignment. Standard Mode I and four-point bend end-notched flexure Mode II tests were undertaken on a set of specimens and compared with pristine specimens.Mode I fracture toughness for T700/M21 laminates was improved by an average of 31% while for T700/SE84LV specimens, an improvement of 61% was observed. Only T700/M21 specimens were tested in Mode II which yielded an average fracture toughness improvement of 161%. Scanning Electron Microscopy (SEM) showed good wetting of the CNT forest as well as evidence of penetration of the forest into the adjacent plies.

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Section: Introductionmentioning

confidence: 99%

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

Falzon¹,

Hawkins

Huynh

et al. 2013

Composite Structures

View full text Add to dashboard Cite

show abstract

“…Conventional carbon fibers, which are prepared by the carbonization of polymer precursors such as polyacrylonitrile (PAN) fibers at high temperature, can be obtained inexpensively; however, these carbon fibers typically have diameters ranging from 1 to 100 mm and poor mechanical strength (rigid but brittle). 6,7 As an alternative to microfibers, nanofibers prepared by applying an electrically charged jet to a polymer solution/melt (electrospinning) have recently received much attention. The rapidly developing technique of electrospinning provides a cost-effective approach to preparing fibers with nanometer-scale diameters for application in electronic components and devices.…”

Section: Introductionmentioning

confidence: 99%

“…17 PAN was chosen because there have been many reports on carbon fibers prepared from PAN fibers by thermal carbonization. 6,7,24 Here, we discuss the morphology and conductivity differences among these electrospun polymer nanofibers formed via ion-beam irradiation at various ion fluences.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanofibers prepared from electrospun polyimide, polysulfone and polyacrylonitrile nanofibers by ion-beam irradiation

Sode

Sato

Tanaka

et al. 2013

Polym J

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Novel electrical conductive carbon nanofibers were prepared by a combination of electrospinning and ion-beam irradiation techniques. Four types of polymer nanofibers, including polyimides (2,2 0 -bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA)-2,2 0 -bis(4-aminophenyl) hexafluoropropane (6FAP) and 6FDA-Bis(4-(4-aminophenoxy)phenyl) sulfone (APPS)), polysulfone (PSF) and polyacrylonitrile, were prepared by the electrospinning method, which yielded fine nanofibers with diameters of B150 nm (except PSF) under optimized conditions. The obtained polymer nanofibrous membranes were irradiated with Kr þ using an ion implanter at various ion fluences to give carbonized nanofibers. The electrical conductivities of the carbon nanofibers increased with an increase in the ion fluence; the conductivity of the electrospun 6FDA-6FAP nanofibrous membrane reached up to ca. 10 À1 S cm À1 with 10 16 ion cm À2 of Kr þ . The influence of the starting polymers on the electrical conductivity of the carbon nanofibers was studied by Raman and X-ray photoelectron spectroscopy analyses.

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“…Conventional carbon fibers are commercially prepared from precursors, such as polyacrylonitrile, and are carbonized at high temperatures; however, these carbon fibers typically have their diameters ranging from 1 to 100 m and poor formability for use in electronic devices [2,3]. As against microfibers, nanofibers prepared through an electrically charged jet of a polymer solution/melt (electrospinning) have received a lot of attentions [4].…”

Section: Introductionmentioning

confidence: 99%

Ion-beam Irradiation on Electrospun Ladder-type Polyimide Nanofibers

Sato

Tanaka

Suzuki

et al. 2013

J. Photopol. Sci. Technol.

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The ladder-type polyimide, polypyrrolone (PPL), nanofibers were prepared by an electrospinning of precursor polymer and followed thermal ring-closing reaction. Ion-beam irradiation on the electrospun PPL nanofibers gave carbon nanofibers. The electrical conductivities of PPL nanofibrous membranes after ion-beam irradiation were lower than those of conventional polyimide (6FDA-6FAP) nanofibrous membranes due to their thick fiber diameters and shallow ion penetration. However, results of dense membranes and Raman spectra revealed that the ladder structure of PPL had advantages in carbonization and graphitization to give higher electrical conductive materials.

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Mechanical properties of vapor grown carbon nanofibers

Cited by 129 publications

References 10 publications

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

An investigation of Mode I and Mode II fracture toughness enhancement using aligned carbon nanotubes forests at the crack interface

Carbon nanofibers prepared from electrospun polyimide, polysulfone and polyacrylonitrile nanofibers by ion-beam irradiation

Ion-beam Irradiation on Electrospun Ladder-type Polyimide Nanofibers

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