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Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method

This paper is concerned with an analysis of the electrical conductivity of graphene/cement composites by means of DC (direct current) and AC (alternating current) techniques. Moreover, the micrograph and element composition of composites have been characterized through SEM (scanning electron microsc...

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Autores principales: Jin, Ming, Li, Wenwei, Ma, Yuefeng, Zeng, Haoyu, Huang, Minghui, Lu, Chao, Yang, Guo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964645/
https://www.ncbi.nlm.nih.gov/pubmed/36837069
http://dx.doi.org/10.3390/ma16041436
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author Jin, Ming
Li, Wenwei
Ma, Yuefeng
Zeng, Haoyu
Huang, Minghui
Lu, Chao
Yang, Guo
author_facet Jin, Ming
Li, Wenwei
Ma, Yuefeng
Zeng, Haoyu
Huang, Minghui
Lu, Chao
Yang, Guo
author_sort Jin, Ming
collection PubMed
description This paper is concerned with an analysis of the electrical conductivity of graphene/cement composites by means of DC (direct current) and AC (alternating current) techniques. Moreover, the micrograph and element composition of composites have been characterized through SEM (scanning electron microscopy) and EDS (energy-dispersive spectrometers) techniques, respectively. Results revealed that a percolation transition region Φ2–Φ1 (Φ2 and Φ1 values are determined as 0.8% and 1.8%, respectively) can be observed in the S-shaped curve. In addition, the logistic model has been recommended to characterize the relationship between the conductivity and the graphene concentration, which ranged from 0.001% to 2.5%. The micrographs obtained by SEM technique clearly indicate a complete conductive network as well as agglomeration of graphene slices when the graphene content reaches the threshold value. Furthermore, graphene slices can be distinguished from the cement hydration products by means of the analysis of element composition obtained through the EDS technique. It is promising to apply the graphene/cement composites as intelligent materials.
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spelling pubmed-99646452023-02-26 Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method Jin, Ming Li, Wenwei Ma, Yuefeng Zeng, Haoyu Huang, Minghui Lu, Chao Yang, Guo Materials (Basel) Article This paper is concerned with an analysis of the electrical conductivity of graphene/cement composites by means of DC (direct current) and AC (alternating current) techniques. Moreover, the micrograph and element composition of composites have been characterized through SEM (scanning electron microscopy) and EDS (energy-dispersive spectrometers) techniques, respectively. Results revealed that a percolation transition region Φ2–Φ1 (Φ2 and Φ1 values are determined as 0.8% and 1.8%, respectively) can be observed in the S-shaped curve. In addition, the logistic model has been recommended to characterize the relationship between the conductivity and the graphene concentration, which ranged from 0.001% to 2.5%. The micrographs obtained by SEM technique clearly indicate a complete conductive network as well as agglomeration of graphene slices when the graphene content reaches the threshold value. Furthermore, graphene slices can be distinguished from the cement hydration products by means of the analysis of element composition obtained through the EDS technique. It is promising to apply the graphene/cement composites as intelligent materials. MDPI 2023-02-08 /pmc/articles/PMC9964645/ /pubmed/36837069 http://dx.doi.org/10.3390/ma16041436 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jin, Ming
Li, Wenwei
Ma, Yuefeng
Zeng, Haoyu
Huang, Minghui
Lu, Chao
Yang, Guo
Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method
title Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method
title_full Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method
title_fullStr Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method
title_full_unstemmed Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method
title_short Investigation on the Electrical Conductivity of Graphene/Cement Composites by Alternating Current Method
title_sort investigation on the electrical conductivity of graphene/cement composites by alternating current method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964645/
https://www.ncbi.nlm.nih.gov/pubmed/36837069
http://dx.doi.org/10.3390/ma16041436
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