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Study of Ultrasonic Dispersion of Graphene Nanoplatelets
Graphene has outstanding mechanical properties due to its unique structure, and is regarded as an ideal reinforcement of metal matrix composites. However, it is always in an agglomerate form due to its large specific surface area, and thus, it must be first dispersed prior to combining with a matrix...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6600743/ https://www.ncbi.nlm.nih.gov/pubmed/31151185 http://dx.doi.org/10.3390/ma12111757 |
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author | Zhang, Bin Chen, Tijun |
author_facet | Zhang, Bin Chen, Tijun |
author_sort | Zhang, Bin |
collection | PubMed |
description | Graphene has outstanding mechanical properties due to its unique structure, and is regarded as an ideal reinforcement of metal matrix composites. However, it is always in an agglomerate form due to its large specific surface area, and thus, it must be first dispersed prior to combining with a matrix, and ultrasonic treatment is considered to be the most effective way. In this work, the effects of parameters of tip ultrasonic treatment, such as ultrasonic time, ultrasonic power, solvent kind, and its temperature, on dispersion and structure of graphene nanoplatelets (GNPs) were studied. The results show that increasing ultrasonic time or ultrasonic power can enhance the dispersion and exfoliation effects of GNPs, but also increase fragmentation degree and disorder degree of C-atom distribution simultaneously. Solvents with low temperature, low viscosity, or high surface tension have similar effects to those of increasing ultrasonic time or power. However, for tap water, a high-surface-tension solvent, it has relatively low fragmentation degree, and good dispersion and exfoliation effects due to the hydrophilicity of GNPs. However, ethyl alcohol is a more suitable solvent because it has excellent volatility and inert reaction characteristics with GNPs and matrix alloys besides a good dispersion effect. The GNPs can achieve the expected status when they are ultrasonically treated for 4 h under a power of 960 W in EA solvent at 35 °C. |
format | Online Article Text |
id | pubmed-6600743 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66007432019-07-16 Study of Ultrasonic Dispersion of Graphene Nanoplatelets Zhang, Bin Chen, Tijun Materials (Basel) Article Graphene has outstanding mechanical properties due to its unique structure, and is regarded as an ideal reinforcement of metal matrix composites. However, it is always in an agglomerate form due to its large specific surface area, and thus, it must be first dispersed prior to combining with a matrix, and ultrasonic treatment is considered to be the most effective way. In this work, the effects of parameters of tip ultrasonic treatment, such as ultrasonic time, ultrasonic power, solvent kind, and its temperature, on dispersion and structure of graphene nanoplatelets (GNPs) were studied. The results show that increasing ultrasonic time or ultrasonic power can enhance the dispersion and exfoliation effects of GNPs, but also increase fragmentation degree and disorder degree of C-atom distribution simultaneously. Solvents with low temperature, low viscosity, or high surface tension have similar effects to those of increasing ultrasonic time or power. However, for tap water, a high-surface-tension solvent, it has relatively low fragmentation degree, and good dispersion and exfoliation effects due to the hydrophilicity of GNPs. However, ethyl alcohol is a more suitable solvent because it has excellent volatility and inert reaction characteristics with GNPs and matrix alloys besides a good dispersion effect. The GNPs can achieve the expected status when they are ultrasonically treated for 4 h under a power of 960 W in EA solvent at 35 °C. MDPI 2019-05-30 /pmc/articles/PMC6600743/ /pubmed/31151185 http://dx.doi.org/10.3390/ma12111757 Text en © 2019 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 Zhang, Bin Chen, Tijun Study of Ultrasonic Dispersion of Graphene Nanoplatelets |
title | Study of Ultrasonic Dispersion of Graphene Nanoplatelets |
title_full | Study of Ultrasonic Dispersion of Graphene Nanoplatelets |
title_fullStr | Study of Ultrasonic Dispersion of Graphene Nanoplatelets |
title_full_unstemmed | Study of Ultrasonic Dispersion of Graphene Nanoplatelets |
title_short | Study of Ultrasonic Dispersion of Graphene Nanoplatelets |
title_sort | study of ultrasonic dispersion of graphene nanoplatelets |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6600743/ https://www.ncbi.nlm.nih.gov/pubmed/31151185 http://dx.doi.org/10.3390/ma12111757 |
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