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Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes

Given the continued challenge of dispersion, for practical purposes, it is of interest to evaluate the impact of multi-walled carbon nanotubes (MWCNTs) at different states of clustering on the eventual performance properties of cement paste. This study evaluated the clustering of MWCNTs and the resu...

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Autores principales: Jang, Sung-Hwan, Kawashima, Shiho, Yin, Huiming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502671/
https://www.ncbi.nlm.nih.gov/pubmed/28773348
http://dx.doi.org/10.3390/ma9040220
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author Jang, Sung-Hwan
Kawashima, Shiho
Yin, Huiming
author_facet Jang, Sung-Hwan
Kawashima, Shiho
Yin, Huiming
author_sort Jang, Sung-Hwan
collection PubMed
description Given the continued challenge of dispersion, for practical purposes, it is of interest to evaluate the impact of multi-walled carbon nanotubes (MWCNTs) at different states of clustering on the eventual performance properties of cement paste. This study evaluated the clustering of MWCNTs and the resultant effect on the mechanical and electrical properties when incorporated into cement paste. Cement pastes containing different concentrations of MWCNTs (up to 0.5% by mass of cement) with/without surfactant were characterized. MWCNT clustering was assessed qualitatively in an aqueous solution through visual observation, and quantitatively in cement matrices using a scanning electron microscopy technique. Additionally, the corresponding 28-day compressive strength, tensile strength, and electrical conductivity were measured. Results showed that the use of surfactant led to a downward shift in the MWCNT clustering size distribution in the matrices of MWCNT/cement paste, indicating improved dispersion of MWCNTs. The compressive strength, tensile strength, and electrical conductivity of the composites with surfactant increased with MWCNT concentration and were higher than those without surfactant at all concentrations.
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spelling pubmed-55026712017-07-28 Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes Jang, Sung-Hwan Kawashima, Shiho Yin, Huiming Materials (Basel) Article Given the continued challenge of dispersion, for practical purposes, it is of interest to evaluate the impact of multi-walled carbon nanotubes (MWCNTs) at different states of clustering on the eventual performance properties of cement paste. This study evaluated the clustering of MWCNTs and the resultant effect on the mechanical and electrical properties when incorporated into cement paste. Cement pastes containing different concentrations of MWCNTs (up to 0.5% by mass of cement) with/without surfactant were characterized. MWCNT clustering was assessed qualitatively in an aqueous solution through visual observation, and quantitatively in cement matrices using a scanning electron microscopy technique. Additionally, the corresponding 28-day compressive strength, tensile strength, and electrical conductivity were measured. Results showed that the use of surfactant led to a downward shift in the MWCNT clustering size distribution in the matrices of MWCNT/cement paste, indicating improved dispersion of MWCNTs. The compressive strength, tensile strength, and electrical conductivity of the composites with surfactant increased with MWCNT concentration and were higher than those without surfactant at all concentrations. MDPI 2016-03-23 /pmc/articles/PMC5502671/ /pubmed/28773348 http://dx.doi.org/10.3390/ma9040220 Text en © 2016 by the authors; 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jang, Sung-Hwan
Kawashima, Shiho
Yin, Huiming
Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes
title Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes
title_full Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes
title_fullStr Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes
title_full_unstemmed Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes
title_short Influence of Carbon Nanotube Clustering on Mechanical and Electrical Properties of Cement Pastes
title_sort influence of carbon nanotube clustering on mechanical and electrical properties of cement pastes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5502671/
https://www.ncbi.nlm.nih.gov/pubmed/28773348
http://dx.doi.org/10.3390/ma9040220
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