An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy

Many studies in recent years have addressed the improvement of the mechanical properties of epoxy through the use of nanoparticles. However, a limited number of studies have focused on the effect of nanocomposite preparation methodologies on mechanical properties. In this research, the influence of...

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Autores principales:	Sajjad Fakhreddini-Najafabadi, Mahdi Torabi, Fathollah Taheri-Behrooz
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Direct dispersion Solution blending Surface treatments Nanocomposite Nanoclay Mechanical properties Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/27b89d03f4934946b8c18ad2cf349a80
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spelling	oai:doaj.org-article:27b89d03f4934946b8c18ad2cf349a802021-11-20T05:06:33ZAn investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy2238-785410.1016/j.jmrt.2021.10.129https://doaj.org/article/27b89d03f4934946b8c18ad2cf349a802021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012667https://doaj.org/toc/2238-7854Many studies in recent years have addressed the improvement of the mechanical properties of epoxy through the use of nanoparticles. However, a limited number of studies have focused on the effect of nanocomposite preparation methodologies on mechanical properties. In this research, the influence of different methodologies, including direct dispersion and solution blending of montmorillonite (MMT) nanoclay (Cloisite® 20A), on the mechanical properties of the epoxy is investigated. In direct dispersion, first, nanoclay-containing nanocomposites with various nanoclay contents (1, 2, and 3 wt.%) were prepared; then, the epoxy reinforced with 2 wt.% nanoclay modified with 3-Aminopropyltriethoxysilane (APS) was constructed. Modified nanoclays were characterized by X-ray diffraction analysis (XRD) and Fourier-transformed infrared spectroscopy (FTIR). In the solution blending methodology, the effect of n-hexane and toluene solvents was addressed in the fabrication of epoxy nanocomposites containing 0.2, 0.4, and 0.8 wt.% Cloisite 20A. The effect of methodology on the micro-porosity percentage was explored by X-ray tomography; while the pattern and intensity of the nanoparticle distribution on the fracture surface were assessed by energy dispersive X-ray spectroscopy (EDX). Tensile and three-point bending tests were also carried out to determine the tensile strength and modulus, flexural strength, toughness modulus, and strain to failure. The fracture surface and the failure mechanisms of the tensile test samples were evaluated by optical microscopy, laser profilometer and field-emission scanning electron microscopy (FE-SEM). Finally, it was observed that the nanocomposites prepared by solution blending using toluene, which contained 0.2 wt.% nanoclay, managed to exhibit the optimal mechanical properties by improving the tensile strength, toughness modulus, and flexural strength by 17.40%, 50.12%, and 11.91%, respectively.Sajjad Fakhreddini-NajafabadiMahdi TorabiFathollah Taheri-BehroozElsevierarticleDirect dispersionSolution blendingSurface treatmentsNanocompositeNanoclayMechanical propertiesMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5375-5395 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Direct dispersion Solution blending Surface treatments Nanocomposite Nanoclay Mechanical properties Mining engineering. Metallurgy TN1-997
spellingShingle	Direct dispersion Solution blending Surface treatments Nanocomposite Nanoclay Mechanical properties Mining engineering. Metallurgy TN1-997 Sajjad Fakhreddini-Najafabadi Mahdi Torabi Fathollah Taheri-Behrooz An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy
description	Many studies in recent years have addressed the improvement of the mechanical properties of epoxy through the use of nanoparticles. However, a limited number of studies have focused on the effect of nanocomposite preparation methodologies on mechanical properties. In this research, the influence of different methodologies, including direct dispersion and solution blending of montmorillonite (MMT) nanoclay (Cloisite® 20A), on the mechanical properties of the epoxy is investigated. In direct dispersion, first, nanoclay-containing nanocomposites with various nanoclay contents (1, 2, and 3 wt.%) were prepared; then, the epoxy reinforced with 2 wt.% nanoclay modified with 3-Aminopropyltriethoxysilane (APS) was constructed. Modified nanoclays were characterized by X-ray diffraction analysis (XRD) and Fourier-transformed infrared spectroscopy (FTIR). In the solution blending methodology, the effect of n-hexane and toluene solvents was addressed in the fabrication of epoxy nanocomposites containing 0.2, 0.4, and 0.8 wt.% Cloisite 20A. The effect of methodology on the micro-porosity percentage was explored by X-ray tomography; while the pattern and intensity of the nanoparticle distribution on the fracture surface were assessed by energy dispersive X-ray spectroscopy (EDX). Tensile and three-point bending tests were also carried out to determine the tensile strength and modulus, flexural strength, toughness modulus, and strain to failure. The fracture surface and the failure mechanisms of the tensile test samples were evaluated by optical microscopy, laser profilometer and field-emission scanning electron microscopy (FE-SEM). Finally, it was observed that the nanocomposites prepared by solution blending using toluene, which contained 0.2 wt.% nanoclay, managed to exhibit the optimal mechanical properties by improving the tensile strength, toughness modulus, and flexural strength by 17.40%, 50.12%, and 11.91%, respectively.
format	article
author	Sajjad Fakhreddini-Najafabadi Mahdi Torabi Fathollah Taheri-Behrooz
author_facet	Sajjad Fakhreddini-Najafabadi Mahdi Torabi Fathollah Taheri-Behrooz
author_sort	Sajjad Fakhreddini-Najafabadi
title	An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy
title_short	An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy
title_full	An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy
title_fullStr	An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy
title_full_unstemmed	An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy
title_sort	investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/27b89d03f4934946b8c18ad2cf349a80
work_keys_str_mv	AT sajjadfakhreddininajafabadi aninvestigationontheeffectsofsynthesisonthemechanicalpropertiesofnanoclayepoxy AT mahditorabi aninvestigationontheeffectsofsynthesisonthemechanicalpropertiesofnanoclayepoxy AT fathollahtaheribehrooz aninvestigationontheeffectsofsynthesisonthemechanicalpropertiesofnanoclayepoxy AT sajjadfakhreddininajafabadi investigationontheeffectsofsynthesisonthemechanicalpropertiesofnanoclayepoxy AT mahditorabi investigationontheeffectsofsynthesisonthemechanicalpropertiesofnanoclayepoxy AT fathollahtaheribehrooz investigationontheeffectsofsynthesisonthemechanicalpropertiesofnanoclayepoxy
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An investigation on the effects of synthesis on the mechanical properties of nanoclay/epoxy

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