Ultrastrong, Stiff and Multifunctional Carbon Nanotube Composites

Wang, Xin; Yong, Zhang; Li, Qingwen; Bradford, Philip D.; Liu, Wei; Tucker, Dennis S.; Cai, Weiping; Wang, Hsin; Fang, Yuan; Zhu, Yuntian

doi:10.1080/21663831.2012.686586

Cited by 137 publications

(99 citation statements)

References 34 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, they produced 60 wt% aligned CNT / bismaleimide (BMI) composites that had 2.1 GPa strength and 169 GPa of elastic modulus that stretched randomly dispersed CNT sheet [27]. Another group has reported 3.8 GPa strength and 293 GPa of elastic modulus that stretched aligned CNT sheet, which is the highest strength and elastic modulus reported to date [28]. Several researchers have also reported other properties, such as mechanical stiffness and electrical properties of aligned CNT /polymer matrix composites [29,30].…”

Section: Introductionmentioning

confidence: 86%

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

View full text Add to dashboard Cite

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

show abstract

Section: Introductionmentioning

confidence: 86%

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

View full text Add to dashboard Cite

show abstract

“…In this study, it was not possible to apply strains greater than ~15% without breaking the veils. Higher strains have been reported using a variety of methods [4,18], but the maximum is likely dependent on the initial orientation of the veil, and other processing factors such as rate and lubrication. Here, different strains are applied simply to demonstrate the analysis method, although in the medium term, the approach should help to optimise the drawing process.…”

Section: Cnt Veil Orientation Measurement and Validationmentioning

confidence: 99%

“…The most common method used to measure CNT alignment is polarised Raman spectroscopy [17,18], using the two characteristics peaks, the D-band at 1350cm -1 and the G-band at 1590cm -1 [19]. The intensity of the G-band Raman scattering is sensitive to the orientation of carbon nanotubes when the excitation laser beam is linearly polarised.…”

Section: Figure 2: Schematic Of Orientation Of An Individual Carbon Nmentioning

confidence: 99%

Mapping carbon nanotube orientation by fast fourier transform of scanning electron micrographs

Brandley

Greenhalgh

Shaffer

et al. 2018

Carbon

View full text Add to dashboard Cite

Please cite this article as: E. Brandley, E.S. Greenhalgh, M.S.P. Shaffer, Q. Li, Mapping carbon nanotube orientation by fast fourier transform of scanning electron micrographs, Carbon (2018), doi: 10.1016/j.carbon.2018.04.063. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractA novel method of applying a two-dimensional Fourier transform (2D-FFT) to SEM was developed to map the CNT orientation in pre-formed arrays. Local 2D-FFTs were integrated azimuthally to determine an orientation distribution function and the associated Herman parameter. This approach provides data rapidly and over a wide range of lengthscales.Although likely to be applicable to a wide range of anisotropic nanoscale structures, the method was specifically developed to study CNT veils, a system in which orientation critically controls mechanical properties. Using this system as a model, key parameters for the 2D-FFT analysis were optimised, including magnification and domain size; a model set of CNT veils were pre-strained to 5%, 10% and 15%, to vary the alignment degree. The algorithm confirmed a narrower orientation distribution function and increasing Herman parameter, with increasing pre-strain.To validate the algorithm, the local orientation was compared to that derived from a common polarised Raman spectroscopy. Orientation maps of the Herman parameter, derived by both methods, showed good agreement. Quantitatively, the mean Herman parameter calculated using the polarised Raman spectroscopy was 0.42±0.004 compared to 0.32±0.002 for the 2D-FFT method, with a correlation coefficient of 0.73. Possible reasons for the modest and systematic discrepancy were discussed.

show abstract

“…In order to further demonstrate the application versatility of this new magnetic CNT nano-hybrid, a soft magnetic composite (SMC) was also produced revealing further applications for SMC items such as rotating machinery, fast switching solenoids [56] "intelligent fibres" for military clothing57] and magnetic sensors [58]. SMC materials are commonly produced using iron powder and resin, using magnetic nanoparticle loaded CNTs as opposed to iron has the added benefit of improved mechanical performance [59]. Electrospinning this solution resulted in a large area of highly aligned nano-fibres loaded with magnetic CNTs.…”

Section: ° C)mentioning

confidence: 99%

Decoration of multiwalled carbon nanotubes with protected iron nanoparticles

McCafferty

Stolojan

King

et al. 2015

Carbon

View full text Add to dashboard Cite

Ultrastrong, Stiff and Multifunctional Carbon Nanotube Composites

Abstract: New concept for reducing dose radiation exposure, which helps to decrease the duration and cost of deep space human missions is introduced. This concept can be efficiently realized, using modern materials, such as carbon nanotube composites.

Cited by 137 publications

References 34 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

Mapping carbon nanotube orientation by fast fourier transform of scanning electron micrographs

Decoration of multiwalled carbon nanotubes with protected iron nanoparticles

Contact Info

Product

Resources

About