Direct measurements of interfacial shear strength of multi-walled carbon nanotube/PEEK composite using a nano-pullout method

Tsuda, Terumasa; Ogasawara, Toshio; Deng, Fei; Takeda, Nobuo

doi:10.1016/j.compscitech.2011.04.014

Cited by 123 publications

(76 citation statements)

References 35 publications

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“…One possible reason is that the interfacial shear strength used in this estimation (20 MPa) is too high. The authors have evaluated the interfacial shear strength (IFSS) of CNT/PEEK and CNT/epoxy composites using a nano-pullout method [38]. Results show that the IFSS of specimens after tensile testing decreased as compared with pristine specimens.…”

Section: Estimation Of Cnt Strengthmentioning

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: Estimation Of Cnt Strengthmentioning

confidence: 99%

“…In that equation, R is the CNT diameter, R is the distance between each layer of CNTs (0.34 nm [38]) and L cr is the average fracture interval (44.6 m). The value of  interwall was stated in earlier reports of the literature [40][41][42].…”

Section: Estimation Of Multiple Fracture Of Cnt Under Tensile Loadingmentioning

confidence: 99%

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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“…They reported that the estimated tensile strength of the nanocomposite based on the shear lag model using the obtained IFSS values is consistent with the experimental ones. To date, the direct microscopic method for determination of IFSS values have also been employed for CNT-filled ceramic [160] and polymer [161] matrix nanocomposites. It is inferred that the tensile strength of the nanocomposites can be maximized by thickening the interfacial region through the formation of a crystalline coating around CNTs or their functionalization or in situ formation of metal oxide/carbide interlayer at boundary zones.…”

Section: Partial Chemical Reactionmentioning

confidence: 99%

Metallurgical Challenges in Carbon Nanotube-Reinforced Metal Matrix Nanocomposites

Azarniya

Safavi

Sovizi

et al. 2017

Metals

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Abstract:The inclusion of carbon nanotubes (CNTs) into metallic systems has been the main focus of recent literature. The aim behind this approach has been the development of a new property or improvement of an inferior one in CNT-dispersed metal matrix nanocomposites. Although it has opened up new possibilities for promising engineering applications, some practical challenges have restricted the full exploitation of CNTs' unique characteristics. Non-uniform dispersion of CNTs in the metallic matrix, poor interfacial adhesion at the CNT/metal interface, the unfavorable chemical reaction of CNTs with the matrix, and low compactability are the most significant challenges, requiring more examination. The present paper provides a broad overview of the mentioned challenges, the way they occur, and their adverse influences on the physicomechanical properties of CNT-reinforced metal matrix nanocomposites. The suggested solutions to these issues are fully addressed.

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“…In order to experimentally measure and assess the interfacial strength of CFRPs, the interfacial shear strength (IFSS) test is important. Generally three techniques have been developed to evaluate the IFSS: the fragmentation test [22,23], pull-out test [24][25][26], and micro-bond test [27][28][29]. Among these, the microbond test has been one of the most extensively used methods to measure the IFSS between reinforcing fibers and polymers due to the simplicity of sample preparation and IFSS measurement [30,31].…”

Section: Measurement Of Wettability and Surface Energiesmentioning

confidence: 99%

Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method

Kim¹,

An²,

Bang³

et al. 2016

Carbon letters

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In this work, we studied the effects of electrochemical oxidation treatments of carbon fibers (CFs) on interfacial adhesion between CF and epoxy resin with various current densities. The surface morphologies and properties of the CFs before and after electrochemical-oxidation-treatment were characterized using field emission scanning electron microscopy, atomic force microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and single-fiber contact angle. The mechanical interfacial shear strength of the CFs/ epoxy matrix composites was investigated by using a micro-bond method. From the results, electrochemical oxidation treatment introduced oxygen functional groups and increased roughness on the fiber surface. The mechanical interfacial adhesion strength also showed higher values than that of an untreated CF-reinforced composite.

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Direct measurements of interfacial shear strength of multi-walled carbon nanotube/PEEK composite using a nano-pullout method

Cited by 123 publications

References 35 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

Metallurgical Challenges in Carbon Nanotube-Reinforced Metal Matrix Nanocomposites

Effects of electrochemical oxidation of carbon fibers on interfacial shear strength using a micro-bond method

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