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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Budapest University of Technology and Economics
2012-04-01
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Series: | eXPRESS Polymer Letters |
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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. |
format | Article |
id | doaj-art-35a6f7db6b0b4ea396db9fb6e55d17f4 |
institution | Matheson Library |
issn | 1788-618X |
language | English |
publishDate | 2012-04-01 |
publisher | Budapest University of Technology and Economics |
record_format | Article |
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 |