On the electrical conductivity of composites with a polymeric matrix and a non-uniform concentration of carbon nanotubes

Matos, Miguel A.S.; Tagarielli, V.L.; Pinho, S.T.

doi:10.1016/j.compscitech.2020.108003

Cited by 23 publications

(11 citation statements)

References 28 publications

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“…Man reports [199][200][201][202][203] have indicated that the incorporation of CNTs with polymers leads to a lower percolation threshold due to the high aspect ratio and intrinsic conductivity of CNTs. The percolation threshold in a polymer matrix composite is the minimum content of filler that allows for no changes in the electrical conductivity of the composite.…”

Section: Mechanism Of Electrical Conductivitymentioning

confidence: 99%

Fabrication, Functionalization, and Application of Carbon Nanotube-Reinforced Polymer Composite: An Overview

et al. 2021

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A novel class of carbon nanotube (CNT)-based nanomaterials has been surging since 1991 due to their noticeable mechanical and electrical properties, as well as their good electron transport properties. This is evidence that the development of CNT-reinforced polymer composites could contribute in expanding many areas of use, from energy-related devices to structural components. As a promising material with a wide range of applications, their poor solubility in aqueous and organic solvents has hindered the utilizations of CNTs. The current state of research in CNTs—both single-wall carbon nanotubes (SWCNT) and multiwalled carbon nanotube (MWCNT)-reinforced polymer composites—was reviewed in the context of the presently employed covalent and non-covalent functionalization. As such, this overview intends to provide a critical assessment of a surging class of composite materials and unveil the successful development associated with CNT-incorporated polymer composites. The mechanisms related to the mechanical, thermal, and electrical performance of CNT-reinforced polymer composites is also discussed. It is vital to understand how the addition of CNTs in a polymer composite alters the microstructure at the micro- and nano-scale, as well as how these modifications influence overall structural behavior, not only in its as fabricated form but also its functionalization techniques. The technological superiority gained with CNT addition to polymer composites may be advantageous, but scientific values are here to be critically explored for reliable, sustainable, and structural reliability in different industrial needs.

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Section: Mechanism Of Electrical Conductivitymentioning

confidence: 99%

Fabrication, Functionalization, and Application of Carbon Nanotube-Reinforced Polymer Composite: An Overview

et al. 2021

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“…curing processing) may occur due to the entanglement and interaction between the fillers 7,11,17,18 . Although aggregation could slightly facilitate local electron transfer by enhancing fiber-to-fiber contact [19][20][21] , it can reduce the global connectivity of fiber networks and thus increase the percolation threshold, significantly degrading the electrical property of composites 7,12,[22][23][24][25] . Therefore, the effect of fiber aggregation on composites properties is crucial and should be carefully treated in the process of material design and manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Fiber Aggregation in Nanocomposites: Aggregation Degree and Its Linear Relation with Percolation Threshold

Cui¹,

Pan²,

Ding³

et al. 2022

Preprint

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Fiber aggregation in nanocomposites has an important effect on the macroscopic electrical performance. To quantitatively evaluate its effect, an index to characterize the degree of aggregation is imperative, and ideally it should have three features simultaneously, i.e., single-parametric, dimensionless and physically meaningful, applicable to different aggregation topologies, and one-to-one corresponding to material electrical properties. To this end, a new aggregation degree is proposed, which is defined as the average increased number of fibers that connect with each one when fibers aggregate from a uniformly distributed state. This index is applicable to different aggregation topologies from lump-like aggregating clusters to network-like aggregating clusters. This index is proven to only depend on the local features of aggregating clusters, and can be concisely expressed by the characteristic parameters of local structure, via geometric probability analysis and numerical validations. Further, a one-to-one linear relation between the aggregation degree and percolation threshold is established by Monte Carlo simulations, which is independent of the distribution law of the fibers. This work provides a guide to the property characterization, performance prediction and material design of nanocomposites, and also gives a physical insight into the understanding of systems with similar non-uniform distributions.

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“…So CNT-reinforced composites have triggered incredible interests in mainstream researchers [1][2][3][4]. The finite element numerical simulation [5][6][7][8] and experimental studies [9][10][11] on the properties of this structure have been carried out.…”

Section: Introductionmentioning

confidence: 99%

An energy method for buckling behavior analysis of functionally graded carbon nanotube-reinforced composite sandwich structures

Wang

Qiao

Liu

et al. 2022

Mater. Res. Express

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The present work aims to investigate the buckling performance of sandwich structure of functionally graded carbon nanotube-reinforced composite (FG‐CNTRC). Through first-order shear deformation theory, an analytical model for the sandwich structure of FG‐CNTRC was established. The governing equation for the prediction of the buckling performance of the sandwich structure of FG‐CNTRC was obtained through energy method. There was analytical solution that can satisfy both boundary conditions. The theoretical model and method were verified by literature analysis, and the influence of each parameter on the buckling performance was evaluated and performed on the basis of the corroborated model. The findings can lay a solid foundation of the design and application of the sandwich structure of FG‐CNTRC.

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On the electrical conductivity of composites with a polymeric matrix and a non-uniform concentration of carbon nanotubes

Cited by 23 publications

References 28 publications

Fabrication, Functionalization, and Application of Carbon Nanotube-Reinforced Polymer Composite: An Overview

Fabrication, Functionalization, and Application of Carbon Nanotube-Reinforced Polymer Composite: An Overview

Fiber Aggregation in Nanocomposites: Aggregation Degree and Its Linear Relation with Percolation Threshold

An energy method for buckling behavior analysis of functionally graded carbon nanotube-reinforced composite sandwich structures

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