Carbon nanotube forest based electrostatic capacitor with excellent dielectric performances

Yao, Sheng‐Hong; Yuan, Jinkai; Mehedi, Hasan-al; Gheeraert, Etienne; Sylvestre, Alain

doi:10.1016/j.carbon.2017.02.043

Cited by 35 publications

(20 citation statements)

References 44 publications

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“…They have excellent mechanical properties since individual CNTs possess very high tensile strength in the range from 11 to 63 GPa, tensile Young's modulus of 1.0 to 1.3 TPa, and high ultimate fracture strain of about 10% [8][9][10][11]. Moreover, CNTs are flexible, lightweight, good heat and electricity conductors, thus being useful in a number of applications [12][13][14][15]. The most important mechanical applications of CNTs are high-strength ropes [2,16], fibers [17][18][19][20][21], polymer-and metal-matrix composites [22][23][24], solid lubricants [24,25], etc.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%

Elastic Damper Based on the Carbon Nanotube Bundle

Rysaeva¹,

Korznikova²,

Мурзаев³

et al. 2020

FU Mech Eng

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show abstract

“…CNTs have superior mechanical properties such as tensile strength up to 63 GPa, tensile Young's modulus up to 1.3 TPa, and ultimate fracture strain up to about 10% [9][10][11][12]. In addition, they are flexible, have low weight, high thermal and electrical conductivity, which makes them very promising for a number of applications [13][14][15][16]. CNT forests are produced by means of various experimental techniques [17][18][19][20][21] and used for making super-strong ropes [7,22], fibers [23][24][25][26][27], fillers for composite materials [28][29][30], solid lubricants [30][31][32][33], etc.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Response of Carbon Nanotube Bundle to Lateral Compression

et al. 2020

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Structure evolution and mechanical response of the carbon nanotube (CNT) bundle under lateral biaxial compression is investigated in plane strain conditions using the chain model. In this model, tensile and bending rigidity of CTN walls, and the van der Waals interactions between them are taken into account. Initially the bundle in cross section is a triangular lattice of circular zigzag CNTs. Under increasing strain control compression, several structure transformations are observed. Firstly, the second-order phase transition leads to the crystalline structure with doubled translational cell. Then the first-order phase transition takes place with the appearance of collapsed CNTs. Further compression results in increase of the fraction of collapsed CNTs at nearly constant compressive stress and eventually all CNTs collapse. It is found that the potential energy of the CNT bundle during deformation changes mainly due to bending of CNT walls, while the contribution from the walls tension-compression and from the van der Waals energies is considerably smaller.

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“…Integrality of 2D CNT films will greatly reduce the susceptibility of CNT agglomeration into the polymer matrix and produce massive interfaces between CNT and polymer matrix to supply extra interfacial polarizations for dielectric loss [28]. Another merit of CNT films is accelerating the transport of charge carriers for Maxwell-Wagner-Sillars polarizations due to adjustable pore channels [29,30]. However, the in-depth exploration is limited to study microwave absorption performances in CNT films/SR composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of CNT films/silicone rubber composite with improved microwave absorption performance

Shen

Yao

Liu

et al. 2019

Mater. Res. Express

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Fabrications of CNT films/SR and CNT powders/SR composites are introduced to provide the rational comparisons of their thermal, mechanical and electrical properties in this work. The growth of CNT films is firstly prepared with floating catalyst chemical vapor deposition (FCCVD) method. CNT films belong to multi-walled CNT and mesoporous characteristic by Raman and nitrogen adsorption-desorption measurements, respectively. CNT films/SR composite also presents better microwave absorption performances with the low-level CNT loadings (0.5 wt%), compared to the CNT powders/SR composites. It exhibits the minimum reflection loss (RL min ) of the CNT films/SR composite is −26.55 dB and related effective absorption bandwidth (RL<−10 dB) of 3.57 GHz) with 1 mm thickness. A proposed absorption mechanism is attributed to optimized impedance matching and enhanced conductive/dielectric losses in the CNT films/SR absorber.

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Carbon nanotube forest based electrostatic capacitor with excellent dielectric performances

Cited by 35 publications

References 44 publications

Elastic Damper Based on the Carbon Nanotube Bundle

Elastic Damper Based on the Carbon Nanotube Bundle

Mechanical Response of Carbon Nanotube Bundle to Lateral Compression

Preparation and characterization of CNT films/silicone rubber composite with improved microwave absorption performance

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