Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene

Polyvinyl alcohol (PVA)-stabilized graphene nanosheets (GNS) of lateral dimension (L) ~1 μm are obtained via liquid phase exfoliation technique to prepare its composites in the PVA matrix. These composites show low levels of reinforcements due to poor alignment of GNS within the matrix as predicted...

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Autores principales: Jan, Rahim, Habib, Amir, Akram, Muhammad Aftab, Zia, Tanveer-ul-Haq, Khan, Ahmad Nawaz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2016
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996809/
https://www.ncbi.nlm.nih.gov/pubmed/27558496
http://dx.doi.org/10.1186/s11671-016-1595-2
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author Jan, Rahim
Habib, Amir
Akram, Muhammad Aftab
Zia, Tanveer-ul-Haq
Khan, Ahmad Nawaz
author_facet Jan, Rahim
Habib, Amir
Akram, Muhammad Aftab
Zia, Tanveer-ul-Haq
Khan, Ahmad Nawaz
author_sort Jan, Rahim
collection PubMed
description Polyvinyl alcohol (PVA)-stabilized graphene nanosheets (GNS) of lateral dimension (L) ~1 μm are obtained via liquid phase exfoliation technique to prepare its composites in the PVA matrix. These composites show low levels of reinforcements due to poor alignment of GNS within the matrix as predicted by the modified Halpin-Tsai model. Drawing these composites up to 200 % strain, a significant improvement in mechanical properties is observed. Maximum values for Young’s modulus and strength are ~×4 and ~×2 higher respectively than that of neat PVA. Moreover, the rate of increase of the modulus with GNS volume fraction is up to 700 GPa, higher than the values predicted using the Halpin-Tsai theory. However, alignment along with strain-induced de-aggregation of GNS within composites accounts well for the obtained results as confirmed by X-ray diffraction (XRD) characterization.
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spelling pubmed-49968092016-09-08 Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene Jan, Rahim Habib, Amir Akram, Muhammad Aftab Zia, Tanveer-ul-Haq Khan, Ahmad Nawaz Nanoscale Res Lett Nano Express Polyvinyl alcohol (PVA)-stabilized graphene nanosheets (GNS) of lateral dimension (L) ~1 μm are obtained via liquid phase exfoliation technique to prepare its composites in the PVA matrix. These composites show low levels of reinforcements due to poor alignment of GNS within the matrix as predicted by the modified Halpin-Tsai model. Drawing these composites up to 200 % strain, a significant improvement in mechanical properties is observed. Maximum values for Young’s modulus and strength are ~×4 and ~×2 higher respectively than that of neat PVA. Moreover, the rate of increase of the modulus with GNS volume fraction is up to 700 GPa, higher than the values predicted using the Halpin-Tsai theory. However, alignment along with strain-induced de-aggregation of GNS within composites accounts well for the obtained results as confirmed by X-ray diffraction (XRD) characterization. Springer US 2016-08-24 /pmc/articles/PMC4996809/ /pubmed/27558496 http://dx.doi.org/10.1186/s11671-016-1595-2 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Jan, Rahim
Habib, Amir
Akram, Muhammad Aftab
Zia, Tanveer-ul-Haq
Khan, Ahmad Nawaz
Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene
title Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene
title_full Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene
title_fullStr Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene
title_full_unstemmed Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene
title_short Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene
title_sort uniaxial drawing of graphene-pva nanocomposites: improvement in mechanical characteristics via strain-induced exfoliation of graphene
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996809/
https://www.ncbi.nlm.nih.gov/pubmed/27558496
http://dx.doi.org/10.1186/s11671-016-1595-2
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