Mechanical properties of aligned multi-walled carbon nanotube/epoxy composites processed using a hot-melt prepreg method

Ogasawara, Toshio; Moon, Seong‐Yong; Inoue, Yasuo; Shimamura, Yoshinobu

doi:10.1016/j.compscitech.2011.08.009

Cited by 120 publications

(108 citation statements)

References 33 publications

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“…The MWCNTs with length exceeding 1 mm were grown on a bare SiO 2 substrate using conventional thermal chemical vapor deposition (CVD) with single gas flow (acetylene) for 20 min. In addition to such a high growth rate, well-aligned MWCNT sheets are produced easily from the MWCNT forest by pulling it out [31]. The CNT sheets have a high volume fraction without a great amount of entanglement, which are ideal properties for use in reinforcement of the composites.…”

Section: Experiments 21 Processing Of Aligned Cnt Sheetsmentioning

confidence: 99%

“…The pressure was approximately 2.0 MPa. Details of procedures used for CNT sheet and composite fabrication have been reported elsewhere [31,37]. The composites' microstructure was observed using a scanning electron microscope (FE-SEM, S-4700; Hitachi Ltd., Japan).…”

Section: Processing Of Cnt/epoxy Compositesmentioning

confidence: 99%

“…Based on these results, they schematically modeled the sword-in-sheath fracture of MWNTs. Our previous reports [31] also described sword-in-sheath fractures of CNTs at the fracture surface of CNT/epoxy composites after tensile testing.…”

Section: Introductionmentioning

confidence: 99%

“…The authors examined the mechanical properties of the aligned CNT / epoxy composites processed using hot-melt technique [31]. The prepreg method presents several advantages compared with ordinary composite molding methods such as resin infusion and resin transfer molding.…”

Section: Introductionmentioning

confidence: 99%

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Nanoscopic observations for evaluating the failure process of aligned multi-walled carbon nanotube/epoxy composites

Tsuda

Ogasawara

Moon

et al. 2013

Composites Science and Technology

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This study examined the nanoscopic damage progression of aligned multi-walled carbon nanotubes (CNT) / epoxy composites under tensile loading using transmission electron microscopy (TEM). Aligned CNT/epoxy composite films (30 micro meter thickness) were processed using a forestdrawn aligned CNT sheet and hot-melt prepreg method. Four film specimens, respectively subjected to tensile stress of 0 MPa, 45 MPa, 95 MPa and 110 MPa, were prepared. After tensile loading, each specimen was machined until the thickness became about 100 nm using a focused ion beam milling machine (FIB) for TEM observations. Damage of three kinds, i.e. CNT break derived from the disordered CNT structures around metallic catalyst, sword-in-sheath type CNT break, and several patterns of interfacial debonding, was observed clearly. The broken CNTs and interfacial debonding per unit area were counted from TEM photographs. Results show that broken CNTs and interface debonding increased considerably at 95-110 MPa, which suggests multiple fracture of CNT under tensile loading. The CNT length at the failure stress (110 MPa) was approximately 45 μm. Estimated values from the strength of CNTs resemble those from macroscopic stress-strain behavior.Nanoscopic observations for evaluating the failure process of aligned multi-walled carbon nanotube / epoxy composites AbstractThis study examined the nanoscopic damage progression of aligned multi-walled carbon nanotubes (CNT) / epoxy composites under tensile loading using transmission electron microscopy (TEM). Aligned CNT/epoxy composite films (30 m thickness) were processed using a

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Section: Experiments 21 Processing Of Aligned Cnt Sheetsmentioning

confidence: 99%

Section: Processing Of Cnt/epoxy Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanoscopic observations for evaluating the failure process of aligned multi-walled carbon nanotube/epoxy composites

Tsuda

Ogasawara

Moon

et al. 2013

Composites Science and Technology

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“…Ogasawara et al 15 reported the fabrication of aligned MWCNT/epoxy composites by a hot-melt prepreg process. In another recent study by Singh et al, 8 up to 20 wt% MWCNTs were uniformly dispersed in the epoxy resin and these had improved mechanical properties (prepared using prepreg technique).…”

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confidence: 99%

Multifunctional, robust, light-weight, free-standing MWCNT/phenolic composite paper as anodes for lithium ion batteries and EMI shielding material

et al. 2014

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a Energy density of Li-ion batteries is marred due to the additional weight of copper, which is used as a current collector. In this work, fabrication of strong, graphitized, multiwalled carbon nanotubes (GCNTs)/phenolic composite paper using a new dispersion technique is reported. The composite paper has been used as a free-standing current collector, as well as an anode material for Li-ion batteries, because of its good electrical conductivity of 76 S cm À1 . This highly thin conductive composite paper (thickness 140 mm) also shows efficient electromagnetic interference (EMI) shielding effectiveness of 32.4 dB in Ku-band (12.4-18 GHz). Moreover, structural and morphological studies were carried out using TEM and SEM. The flexural strength of the composite paper was 30 MPa, which is good enough for use as an electrode in batteries. The electrochemical properties of the composite paper were investigated by galvanostatic charge-discharge test. It exhibits a stable reversible specific capacity for more than 45 cycles. EMI shielding effectiveness (SE) was measured using a vector network analyzer, and the total EMI-SE surpasses the value needed for commercial applications.

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Mechanical Properties of Polymer Nanocomposites

Tjong

2012

Polymer Composites With Carbonaceous Nanofillers

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Mechanical properties of aligned multi-walled carbon nanotube/epoxy composites processed using a hot-melt prepreg method

Cited by 120 publications

References 33 publications

Nanoscopic observations for evaluating the failure process of aligned multi-walled carbon nanotube/epoxy composites

Nanoscopic observations for evaluating the failure process of aligned multi-walled carbon nanotube/epoxy composites

Multifunctional, robust, light-weight, free-standing MWCNT/phenolic composite paper as anodes for lithium ion batteries and EMI shielding material

Mechanical Properties of Polymer Nanocomposites

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