Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites

Two graphene-based nanofillers of different sizes were melt mixed with polylactide acid (PLA). Composite films based on graphite nanoplatelets (GNPs) with the largest lateral size showed superior electrical conductivity and a lower percolation threshold after melt-compounding and hot-pressing at roo...

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Autores principales:	Yuqing Gao, Olivier T. Picot, Han Zhang, Emiliano Bilotti, Ton Peijs
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2017
Materias:	Graphene Polylactide acid (PLA) Hybrids Electrical properties Conductivity Dynamic percolation Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/fcafd5e2abc3425ab1fc70169a2bd371
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spelling	oai:doaj.org-article:fcafd5e2abc3425ab1fc70169a2bd3712021-12-02T00:42:54ZSynergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites2055-03242055-033210.1080/20550324.2017.1333780https://doaj.org/article/fcafd5e2abc3425ab1fc70169a2bd3712017-04-01T00:00:00Zhttp://dx.doi.org/10.1080/20550324.2017.1333780https://doaj.org/toc/2055-0324https://doaj.org/toc/2055-0332Two graphene-based nanofillers of different sizes were melt mixed with polylactide acid (PLA). Composite films based on graphite nanoplatelets (GNPs) with the largest lateral size showed superior electrical conductivity and a lower percolation threshold after melt-compounding and hot-pressing at room temperature. However, upon annealing in the melt, composites based on GNPs with the smallest lateral size displayed significantly improved electrical conductivity and a decrease in percolation threshold as a result of dynamic percolation while composites based on large GNPs showed hardly any change in conductivity and percolation threshold. Hybrid filler systems based on 5 wt% GNP with variable small/large GNP filler ratios displayed synergistic effects in the formation of a conductive network during thermal annealing, and an optimum filler ratio of 50/50 was found to achieve the highest conductivity after annealing. This annealing-induced increase in particle connectivity for composites based on 5 wt.% hybrid small/large GNPs was also reflected in rheological measurements by the manifestation of a plateau in the storage modulus at low frequencies after annealing while such phenomenon was not observed for nanocomposites solely based on either small or large GNPs at similar loadings.Yuqing GaoOlivier T. PicotHan ZhangEmiliano BilottiTon PeijsTaylor & Francis GrouparticleGraphenePolylactide acid (PLA)HybridsElectrical propertiesConductivityDynamic percolationMaterials of engineering and construction. Mechanics of materialsTA401-492Polymers and polymer manufactureTP1080-1185ENNanocomposites, Vol 3, Iss 2, Pp 67-75 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Graphene Polylactide acid (PLA) Hybrids Electrical properties Conductivity Dynamic percolation Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
spellingShingle	Graphene Polylactide acid (PLA) Hybrids Electrical properties Conductivity Dynamic percolation Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185 Yuqing Gao Olivier T. Picot Han Zhang Emiliano Bilotti Ton Peijs Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites
description	Two graphene-based nanofillers of different sizes were melt mixed with polylactide acid (PLA). Composite films based on graphite nanoplatelets (GNPs) with the largest lateral size showed superior electrical conductivity and a lower percolation threshold after melt-compounding and hot-pressing at room temperature. However, upon annealing in the melt, composites based on GNPs with the smallest lateral size displayed significantly improved electrical conductivity and a decrease in percolation threshold as a result of dynamic percolation while composites based on large GNPs showed hardly any change in conductivity and percolation threshold. Hybrid filler systems based on 5 wt% GNP with variable small/large GNP filler ratios displayed synergistic effects in the formation of a conductive network during thermal annealing, and an optimum filler ratio of 50/50 was found to achieve the highest conductivity after annealing. This annealing-induced increase in particle connectivity for composites based on 5 wt.% hybrid small/large GNPs was also reflected in rheological measurements by the manifestation of a plateau in the storage modulus at low frequencies after annealing while such phenomenon was not observed for nanocomposites solely based on either small or large GNPs at similar loadings.
format	article
author	Yuqing Gao Olivier T. Picot Han Zhang Emiliano Bilotti Ton Peijs
author_facet	Yuqing Gao Olivier T. Picot Han Zhang Emiliano Bilotti Ton Peijs
author_sort	Yuqing Gao
title	Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites
title_short	Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites
title_full	Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites
title_fullStr	Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites
title_full_unstemmed	Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites
title_sort	synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (pla)/graphite nanoplatelet (gnp) nanocomposites
publisher	Taylor & Francis Group
publishDate	2017
url	https://doaj.org/article/fcafd5e2abc3425ab1fc70169a2bd371
work_keys_str_mv	AT yuqinggao synergisticeffectsoffillersizeonthermalannealinginducedpercolationinpolylacticacidplagraphitenanoplateletgnpnanocomposites AT oliviertpicot synergisticeffectsoffillersizeonthermalannealinginducedpercolationinpolylacticacidplagraphitenanoplateletgnpnanocomposites AT hanzhang synergisticeffectsoffillersizeonthermalannealinginducedpercolationinpolylacticacidplagraphitenanoplateletgnpnanocomposites AT emilianobilotti synergisticeffectsoffillersizeonthermalannealinginducedpercolationinpolylacticacidplagraphitenanoplateletgnpnanocomposites AT tonpeijs synergisticeffectsoffillersizeonthermalannealinginducedpercolationinpolylacticacidplagraphitenanoplateletgnpnanocomposites
_version_	1718403533564280832

Synergistic effects of filler size on thermal annealing-induced percolation in polylactic acid (PLA)/graphite nanoplatelet (GNP) nanocomposites

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