Multi-scale alignment construction for strong and conductive carbon nanotube/carbon composites

Han, Yue; Li, Shan; Chen, Fenghua

doi:10.1016/j.mtcomm.2015.12.002

Cited by 27 publications

(47 citation statements)

References 59 publications

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“…As listed in Table 4, the thermal conductivity in the thickness direction of the CNT film was only 0.18 W/m•K, whereas that of CNTF/MPC@1300 increased by an order of magnitude of 1.89 W/m•K due to the heat transfer effect of the carbon matrix. Figure 10 is a comparison plot of the electrical conductivities and volume densities of the CNTF/MPC nanocomposites with reported data of diverse CNT/C bulk composites [16,17,[19][20][21][23][24][25]27,28,49]. The CNTF/MPC nanocomposites in this work showed relatively higher electrical conductivities than most CNT/C bulk composites presented in the literature.…”

Section: Pyrolysis Performance and High Temperature Tolerancesupporting

confidence: 58%

The Fabrication and Properties of a Bendable High-Temperature Resistance Conductive Pitch-Based Carbon/CNT Film Nanocomposite

Che

Wang

et al. 2021

Nanomaterials

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This paper fabricates a carbon nanotube (CNT ) film-reinforced mesophase pitch-based carbon (CNTF/MPC) nanocomposite by using a hot-pressing carbonization method. During the carbonization, the stacked aromatic layers tended to rearrange into amorphous carbon, and subsequently generated crystalline carbon in the matrix. The continuous entangled CNT networks were efficiently densified by the carbon matrix though optimized external pressure to obtain the high-performance nanocomposites. The CNTF/MPC@1300 displayed a stable electrical conductivity up to 841 S/cm at RT-150 °C. Its thermal conductivity in the thickness direction was 1.89 W/m∙K, an order of magnitude higher than that of CNT film. Moreover, CNTF/MPC@1300 showed a mass retention of 99.3% at 1000 °C. Its tensile strength was 2.6 times the CNT film and the tensile modulus was two orders of magnitude higher. Though the CNTF/MPC nanocomposites exhibited brittle tensile failure mode, they resisted cyclic bending without damage. The results demonstrate that the CNTF/MPC nanocomposite has potential application in multi-functional temperature resistance aerospace structures.

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Section: Pyrolysis Performance and High Temperature Tolerancesupporting

confidence: 58%

The Fabrication and Properties of a Bendable High-Temperature Resistance Conductive Pitch-Based Carbon/CNT Film Nanocomposite

Che

Wang

et al. 2021

Nanomaterials

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“…The porosity or packing density affects the buckypaper properties [33]; therefore, some researchers studied the magnitude of porosity in buckypaper. As per the recent findings, the porosity of as-fabricated buckypaper obtained from the vacuum filtration method generally ranges between 60%-80% of their total volume [34][35][36]. For superior electrical, mechanical, and thermal properties, less porousness, i.e., buckypaper with a higher magnitude of packing density, is desired.…”

Section: Introductionmentioning

confidence: 90%

A New Route to Enhance the Packing Density of Buckypaper for Superior Piezoresistive Sensor Characteristics

Danish

Luo

2020

Sensors

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Transforming individual carbon nanotubes (CNTs) into bulk form is necessary for the utilization of the extraordinary properties of CNTs in sensor applications. Individual CNTs are randomly arranged when transformed into the bulk structure in the form of buckypaper. The random arrangement has many pores among individual CNTs, which can be treated as gaps or defects contributing to the degradation of CNT properties in the bulk form. A novel technique of filling these gaps is successfully developed in this study and termed as a gap-filling technique (GFT). The GFT is implemented on SWCNT-based buckypaper in which the pores are filled through small-size MWCNTs, resulting in a ~45.9% improvement in packing density. The GFT is validated through the analysis of packing density along with characterization and surface morphological study of buckypaper using Raman spectrum, particle size analysis, scanning electron microscopy, atomic force microscopy and optical microscopy. The sensor characteristics parameters of buckypaper are investigated using a dynamic mechanical analyzer attached with a digital multimeter. The percentage improvement in the electrical conductivity, tensile gauge factor, tensile strength and failure strain of a GFT-implemented buckypaper sensor are calculated as 4.11 ± 0.61, 44.81 ± 1.72, 49.82 ± 8.21 and 113.36 ± 28.74, respectively.

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“…G-band is believed to derive from the stretching of sp 2 -hybridized carbon atom bonds along the surface of graphitic CNTs [19][20][21]. Alignment of CNTs within the polymer matrix has significant effect on both D-band and G-band peaks [22][23][24]; this introduces Raman spectroscopy as a complementary technique to verify the alignment of SWCNTs within the polymer matrix.…”

Section: Justification Of Cnt Alignmentmentioning

confidence: 99%

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Amani¹,

Hashemi²,

Mousavi³

et al. 2018

Carbon Nanotubes - Recent Progress

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In the current chapter, achievement of aligned carbon nanotube (CNT) network within the matrix via various kinds of electric fields (AC and DC) was evaluated. In this case, alignment mechanism of CNTs within the matrix and two useful techniques for justification of CNT alignment throughout the matrix were examined and presented, respectively. Afterward, effective factors in matter of CNT alignment and applicable procedures for fabrication of nanocomposites containing aligned CNTs were studied and presented, respectively. At the end, significant effects of CNT alignment on overall properties of nanocomposites that include electrical and mechanical properties were evaluated. Achieved results revealed that alignment of CNTs within the matrix can lead to significant improvement in the electrical and mechanical properties of nanocomposites at the same filler loading compared with randomly distribution of CNTs within the matrix, while production steps and conditions can also highly affect the outcome data.

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Multi-scale alignment construction for strong and conductive carbon nanotube/carbon composites

Cited by 27 publications

References 59 publications

The Fabrication and Properties of a Bendable High-Temperature Resistance Conductive Pitch-Based Carbon/CNT Film Nanocomposite

The Fabrication and Properties of a Bendable High-Temperature Resistance Conductive Pitch-Based Carbon/CNT Film Nanocomposite

A New Route to Enhance the Packing Density of Buckypaper for Superior Piezoresistive Sensor Characteristics

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

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