Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends

In the present work, the morphology and the electrical and thermal conduction properties of co-continuous poly(vinylidene fluoride) (PVDF), maleated polypropylene (PPgMA) and multiwall carbon nanotubes (CNT) nanostructured blends are investigated. CNT preferentially locates in the PPgMA phase and cl...

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Autores principales:	Samuele Colonna, Zhidong Han, Alberto Fina
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2018
Materias:	Co-continuous blends CNT double percolation thermal diffusivity electrical conductivity interfacial phonon scattering Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/9c7bd02ce98f4360ac1300528e438275
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spelling	oai:doaj.org-article:9c7bd02ce98f4360ac1300528e4382752021-12-02T02:24:27ZDecoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends2055-03242055-033210.1080/20550324.2018.1503782https://doaj.org/article/9c7bd02ce98f4360ac1300528e4382752018-07-01T00:00:00Zhttp://dx.doi.org/10.1080/20550324.2018.1503782https://doaj.org/toc/2055-0324https://doaj.org/toc/2055-0332In the present work, the morphology and the electrical and thermal conduction properties of co-continuous poly(vinylidene fluoride) (PVDF), maleated polypropylene (PPgMA) and multiwall carbon nanotubes (CNT) nanostructured blends are investigated. CNT preferentially locates in the PPgMA phase and clearly causes a refinement in the co-continuous structure. Electrical conductivity experiments show that nanocomposites are well above the percolation threshold and evidence for one order of magnitude enhancement in conductivity for the co-continuous nanocomposites compared to the monophasic nanocomposites with the same CNT volume fraction. On the other hand, thermal diffusivity enhancement for the co-continuous blends is found lower than that for the monophasic nanocomposites at the same CNT volume fraction. An explanation is proposed in terms of large interfacial area, causing phonon scattering at the interface between immiscible PVDF and PPgMA domains. Results described in this paper open the way to the preparation of high electrical and low thermal conductivity materials with possible application as thermoelectrics.Samuele ColonnaZhidong HanAlberto FinaTaylor & Francis GrouparticleCo-continuous blendsCNTdouble percolationthermal diffusivityelectrical conductivityinterfacial phonon scatteringMaterials of engineering and construction. Mechanics of materialsTA401-492Polymers and polymer manufactureTP1080-1185ENNanocomposites, Vol 4, Iss 3, Pp 80-86 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Co-continuous blends CNT double percolation thermal diffusivity electrical conductivity interfacial phonon scattering Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
spellingShingle	Co-continuous blends CNT double percolation thermal diffusivity electrical conductivity interfacial phonon scattering Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185 Samuele Colonna Zhidong Han Alberto Fina Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends
description	In the present work, the morphology and the electrical and thermal conduction properties of co-continuous poly(vinylidene fluoride) (PVDF), maleated polypropylene (PPgMA) and multiwall carbon nanotubes (CNT) nanostructured blends are investigated. CNT preferentially locates in the PPgMA phase and clearly causes a refinement in the co-continuous structure. Electrical conductivity experiments show that nanocomposites are well above the percolation threshold and evidence for one order of magnitude enhancement in conductivity for the co-continuous nanocomposites compared to the monophasic nanocomposites with the same CNT volume fraction. On the other hand, thermal diffusivity enhancement for the co-continuous blends is found lower than that for the monophasic nanocomposites at the same CNT volume fraction. An explanation is proposed in terms of large interfacial area, causing phonon scattering at the interface between immiscible PVDF and PPgMA domains. Results described in this paper open the way to the preparation of high electrical and low thermal conductivity materials with possible application as thermoelectrics.
format	article
author	Samuele Colonna Zhidong Han Alberto Fina
author_facet	Samuele Colonna Zhidong Han Alberto Fina
author_sort	Samuele Colonna
title	Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends
title_short	Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends
title_full	Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends
title_fullStr	Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends
title_full_unstemmed	Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends
title_sort	decoupled trends for electrical and thermal conductivity in phase-confined cnt co-continuous blends
publisher	Taylor & Francis Group
publishDate	2018
url	https://doaj.org/article/9c7bd02ce98f4360ac1300528e438275
work_keys_str_mv	AT samuelecolonna decoupledtrendsforelectricalandthermalconductivityinphaseconfinedcntcocontinuousblends AT zhidonghan decoupledtrendsforelectricalandthermalconductivityinphaseconfinedcntcocontinuousblends AT albertofina decoupledtrendsforelectricalandthermalconductivityinphaseconfinedcntcocontinuousblends
_version_	1718402486052585472

Decoupled trends for electrical and thermal conductivity in phase-confined CNT co-continuous blends

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