Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric properties

Chemically derivatized graphene/poly(vinyl alcohol) (PVA) nanocomposites were successfully fabricated by combination of solution processing and compression molding. SEM imaging combined with XRD measurements revealed that graphene platelets were fully incorporated into the polymer matrix after their...

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Main Authors: G. C. Psarras, I. Tantis, D. Tasis
Format: Article
Language:English
Published: Budapest University of Technology and Economics 2012-04-01
Series:eXPRESS Polymer Letters
Subjects:
Online Access:http://www.expresspolymlett.com/letolt.php?file=EPL-0002909&mi=cd
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author G. C. Psarras
I. Tantis
D. Tasis
author_facet G. C. Psarras
I. Tantis
D. Tasis
author_sort G. C. Psarras
collection DOAJ
description Chemically derivatized graphene/poly(vinyl alcohol) (PVA) nanocomposites were successfully fabricated by combination of solution processing and compression molding. SEM imaging combined with XRD measurements revealed that graphene platelets were fully incorporated into the polymer matrix after their chemical modification through adsorption of amphiphilic copolymer. The chemical functionalities onto the graphitic surface prevented particle aggregation and provided compatibility with the polymer matrix. Thermogravimetric analysis demonstrated enhanced thermal stability for the composites containing modified graphenes at loading above 1 wt%. Differential scanning calorimetry thermograms showed that graphene nanoplatelets induced the crystallization of matrix with optimum loading at 2 wt%. Dielectric spectroscopy measurements showed enhanced electrical permittivity for the graphene oxide/PVA system, compared to the one of graphene/copolymer/PVA. This could be attributed to the formation of an insulating coating between graphite inclusions and PVA because of the presence of the copolymer.
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publisher Budapest University of Technology and Economics
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series eXPRESS Polymer Letters
spelling doaj-art-35a6f7db6b0b4ea396db9fb6e55d17f42025-07-02T06:04:54ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2012-04-016428329210.3144/expresspolymlett.2012.31Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric propertiesG. C. PsarrasI. TantisD. TasisChemically derivatized graphene/poly(vinyl alcohol) (PVA) nanocomposites were successfully fabricated by combination of solution processing and compression molding. SEM imaging combined with XRD measurements revealed that graphene platelets were fully incorporated into the polymer matrix after their chemical modification through adsorption of amphiphilic copolymer. The chemical functionalities onto the graphitic surface prevented particle aggregation and provided compatibility with the polymer matrix. Thermogravimetric analysis demonstrated enhanced thermal stability for the composites containing modified graphenes at loading above 1 wt%. Differential scanning calorimetry thermograms showed that graphene nanoplatelets induced the crystallization of matrix with optimum loading at 2 wt%. Dielectric spectroscopy measurements showed enhanced electrical permittivity for the graphene oxide/PVA system, compared to the one of graphene/copolymer/PVA. This could be attributed to the formation of an insulating coating between graphite inclusions and PVA because of the presence of the copolymer.http://www.expresspolymlett.com/letolt.php?file=EPL-0002909&mi=cdPolymer compositesnanocompositesgraphenedielectric propertiesthermal stability
spellingShingle G. C. Psarras
I. Tantis
D. Tasis
Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric properties
eXPRESS Polymer Letters
Polymer composites
nanocomposites
graphene
dielectric properties
thermal stability
title Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric properties
title_full Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric properties
title_fullStr Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric properties
title_full_unstemmed Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric properties
title_short Functionalized graphene – poly(vinyl alcohol) nanocomposites: Physical and dielectric properties
title_sort functionalized graphene 8211 poly vinyl alcohol nanocomposites physical and dielectric properties
topic Polymer composites
nanocomposites
graphene
dielectric properties
thermal stability
url http://www.expresspolymlett.com/letolt.php?file=EPL-0002909&mi=cd
work_keys_str_mv AT gcpsarras functionalizedgraphene8211polyvinylalcoholnanocompositesphysicalanddielectricproperties
AT itantis functionalizedgraphene8211polyvinylalcoholnanocompositesphysicalanddielectricproperties
AT dtasis functionalizedgraphene8211polyvinylalcoholnanocompositesphysicalanddielectricproperties