Improving bending rigidity of graphene nanoribbons by twisting

Savin, A. V.; Korznikova, Elena A.

doi:10.1016/j.mechmat.2019.103123

Cited by 25 publications

(10 citation statements)

References 66 publications

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“…Table 6, shows that strength of ABS/SWCNT composite filaments is higher than that of ABS/MWCNT nanocomposites which can be attributed to the higher aspect ratio and surface area of SWCNT with ABS matrix with respect to MWCNT, as shown in Figure 4b,d. Moreover, some bending and twisting in the structure of the SWCNT could increase the bending stiffness of carbon nanomaterials with reduced dimension (and can be easier realized in single wall carbon nanotubes that in multiwall ones) [43] and prevent the detachment of SWCNT from ABS matrix. Therefore, these factors may induce a better interfacial interaction between the SWCNT and ABS matrix due to more efficiency in the load transfer from the ABS matrix to SWCNT.…”

Section: Tensile Properties Of Filamentsmentioning

confidence: 99%

Investigation of the Effects of Multi-Wall and Single-Wall Carbon Nanotubes Concentration on the Properties of ABS Nanocomposites

Gutiérrez

Dul

Pegoretti

et al. 2021

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The effects of two types of carbon nanotubes, namely multiwall (MWCNT) and single-wall (SWCNT) carbon nanotube, on the thermal and mechanical properties of acrylonitrile-butadiene-styrene (ABS) nanocomposites, have been investigated. ABS filled-CNT nanocomposites with various filler loadings of 5–10 wt% were properly produced by a solvent-free process in blend compounding at 190 °C. Compression moulded plates and extruded filaments were obtained at 190 °C and 230 °C, respectively. Melt flow index (MFI), shore hardness, Vicat temperature, differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA) were performed to characterize and compared the different CNT nanocomposites. ABS/SWCNT composite filaments showed higher tensile properties (i.e., stiffness and strength), than ABS/MWCNT. The electrical resistivity of ABS/SWCNT and ABS/MWCNT filaments decreased to 0.19 Ω.cm and 0.65 Ω.cm for nanocomposites with 10 wt% of nanofillers; a power law was presented to describe the electrical resistivity of composites as a function of the CNTs content. A final comparative parameter regarding melt flow, stiffness and conductivity was also evaluated for understanding the combined effects of the nanofillers. SWCNT nanocomposites exhibited better overall cumulative results than MWCNT nanocomposites.

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Section: Tensile Properties Of Filamentsmentioning

confidence: 99%

Investigation of the Effects of Multi-Wall and Single-Wall Carbon Nanotubes Concentration on the Properties of ABS Nanocomposites

Gutiérrez

Dul

Pegoretti

et al. 2021

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“…where the first term in the right-hand side gives the kinetic energy of the carbon atoms, the second to the fourth terms stand for the energy of valence bonds, the energy of valence angles and the energy of van der Waals interactions between CNTs, respectively. The model parameters were calculated based on the Savin interatomic potential developed for sp 2 -carbon [66] and successfully used for solving various problems [66][67][68][69][70][71]. Compression up to ||=0.3 is analyzed for all three loading schemes, which is sufficient for the purpose of our study.…”

Section: Simulation Detailsmentioning

confidence: 99%

Elastic Damper Based on the Carbon Nanotube Bundle

Rysaeva¹,

Korznikova²,

Мурзаев³

et al. 2020

FU Mech Eng

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Mechanical response of the carbon nanotube bundle to uniaxial and biaxial lateral compression followed by unloading is modeled under plane strain conditions. The chain model with a reduced number of degrees of freedom is employed with high efficiency. During loading, two critical values of strain are detected. Firstly, period doubling is observed as a result of the second order phase transition, and at higher compressive strain, the first order phase transition takes place when carbon nanotubes start to collapse. The loading-unloading stress-strain curves exhibit a hysteresis loop and, upon unloading, the structure returns to its initial form with no residual strain. This behavior of the nanotube bundle can be employed for the design of an elastic damper.

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“…Here the first term, K, gives the kinetic energy of the carbon atoms, UB stands for the energy of valence bonds, UA is the energy of valence angles, and UVdW is the energy of van der Waals interactions between CNTs. The model parameters were calculated based on the interatomic potential developed for sp 2 -carbon by Savin et al [56] and further applied for investigation of various phenomena [56][57][58][59][60][61]. The initially constructed CNT bundle is subjected to relaxation in order to obtain minimum energy configuration.…”

Section: Model and Computational Detailsmentioning

confidence: 99%

Evolution of the Carbon Nanotube Bundle Structure Under Biaxial and Shear Strains

et al. 2020

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Close packed carbon nanotube bundles are materials with highly deformable elements, for which unusual deformation mechanisms are expected. Structural evolution of the zigzag carbon nanotube bundle subjected to biaxial lateral compression with the subsequent shear straining is studied under plane strain conditions using the chain model with a reduced number of degrees of freedom. Biaxial compression results in bending of carbon nanotubes walls and formation of the characteristic pattern, when nanotube cross-sections are inclined in the opposite directions alternatively in the parallel close-packed rows. Subsequent shearing up to a certain shear strain leads to an appearance of shear bands and vortex-like displacements. Stress components and potential energy as the functions of shear strain for different values of the biaxial volumetric strain are analyzed in detail. A new mechanism of carbon nanotube bundle shear deformation through cooperative, vortex-like displacements of nanotube cross sections is reported.

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Improving bending rigidity of graphene nanoribbons by twisting

Cited by 25 publications

References 66 publications

Investigation of the Effects of Multi-Wall and Single-Wall Carbon Nanotubes Concentration on the Properties of ABS Nanocomposites

Investigation of the Effects of Multi-Wall and Single-Wall Carbon Nanotubes Concentration on the Properties of ABS Nanocomposites

Elastic Damper Based on the Carbon Nanotube Bundle

Evolution of the Carbon Nanotube Bundle Structure Under Biaxial and Shear Strains

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