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Grant support

This work was supported by the Ministerio de Economia y Competitividad of Spanish Government [Project MAT2013-46695-C3-1-R] and Comunidad de Madrid Government [Project P2013/MIT-2862].

Analysis of institutional authors

Fernández Sánchez-Romate, Xoan XoséAuthorSanchez-Romate, XfCorresponding AuthorJimenez-Suarez, AAuthorSanchez, MAuthorUrena, AAuthor

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September 27, 2022
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Novel approach to percolation threshold on electrical conductivity of carbon nanotube reinforced nanocomposites

Publicated to:Rsc Advances. 6 (49): 43418-43428 - 2016-01-01 6(49), DOI: 10.1039/c6ra03619h

Authors: Sanchez-Romate, Xoan F; Jimenez-Suarez, Alberto; Sanchez, Maria; Guemes, Alfredo; Urena, Alejandro

Affiliations

Univ Politecn Madrid, Escuela Tecn Super Ingn Aeronaut, Dept Aerosp Mat & Proc, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain - Author
Univ Rey Juan Carlos, Mat Sci & Engn Area, Escuela Super Ciencias Expt & Tecnol, C Tulipan S-N, Madrid 28933, Spain - Author

Abstract

To date, most analytical models used to calculate electrical conductivity in carbon nanotube (CNT) reinforced nanocomposites are not able to predict electrical properties for contents much higher than the percolation threshold. This is because these models do not take into account many critical factors, such as nanotube waviness, dispersion state and process parameters. In the present paper, a novel analytical model based on an equivalent percolation threshold concept, valid for all CNT contents, is developed for this approach. To achieve this, the influence of all these factors has been investigated and several experimental tests have been conducted in order to validate the model. The electrical conductivity varies by several orders of magnitude depending on the value of these parameters, increasing with carbon nanotube content and aspect ratio and decreasing with its waviness. From experimental data, it is found that the waviness increases with carbon nanotube content. Besides, functionalization also causes a local distortion of CNTs, producing more entanglement. When comparing two different dispersion procedures, calendering and toroidal milling, it is noticed that the first method has a greater stretching effect because the shear forces induced are much higher, causing the breakage of carbon nanotubes.

Keywords

Analytical modelsAspect ratioBehaviorCarbon nanotubesDispersionDispersionsElectric conductivityElectric conductivity of solidsElectrical conductivityEpoxy compositesExperimental testFilmsFunctionalizationFunctionalizationsNanocompositesNanotubesNetworksOrders of magnitudePercolation (computer storage)Percolation (fluids)Percolation thresholdsProcess parametersReinforced nanocompositeReinforcementResinShear flowSolventsStateStretching effectWavinessYarn

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Rsc Advances due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2016, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category Chemical Engineering (Miscellaneous). Notably, the journal is positioned above the 90th percentile.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations from Scopus Elsevier, it yields a value for the Field-Weighted Citation Impact from the Scopus agency: 1.24, which indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 14, 2024)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-07-22, the following number of citations:

  • WoS: 36
  • Scopus: 40

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-07-22:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 48 (PlumX).

Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (Sánchez Martínez, María) and Last Author (Ureña Fernández, Alejandro).

the author responsible for correspondence tasks has been Sánchez Martínez, María.