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Few-layer graphene aqueous suspensions for polyurethane composite coatings

Published online by Cambridge University Press:  20 December 2016

Eunice Cunha ,
Fernando Duarte ,
M. Fernanda Proença  and
M. Conceição Paiva
Eunice Cunha*
Affiliation:
Instituto de Polímeros e Compósitos/i3N, Universidade do Minho, Campus de Azurém, 4808-533 Guimarães, Portugal
Fernando Duarte
Affiliation:
Instituto de Polímeros e Compósitos/i3N, Universidade do Minho, Campus de Azurém, 4808-533 Guimarães, Portugal
M. Fernanda Proença
Affiliation:
Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
M. Conceição Paiva
Affiliation:
Instituto de Polímeros e Compósitos/i3N, Universidade do Minho, Campus de Azurém, 4808-533 Guimarães, Portugal
*
*(Email: eunice.cunha@dep.uminho.pt)
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Abstract

Graphite nanoplates (GnP) have recently attracted attention as an economically viable alternative for the development of functional and structural nanocomposites. The incorporation of GnP into waterborne polyurethane (WPU) with loadings from 0.1 to 10 wt.% was studied. The mechanical properties of the composite films were assessed by tensile testing showing an increase of the Young’s modulus up to 48%. The electrical conductivity increased by 9 orders of magnitude and the water vapor permeability of the composite films decreased 57% for composites containing 5.0 wt.% of GnP.

Keywords

compositebarrier layerelectrical properties

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Type
Articles
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MRS Advances , Volume 2 , Issue 1: Nanomaterials , 2017 , pp. 57 - 62
Copyright
Copyright © Materials Research Society 2016 

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