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Enhancing the electrical conductivity of polyetherimide-based foams by simultaneously increasing the porosity and graphene nanoplatelets dispersion

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Abbasi, H. Enhancing the electrical conductivity of polyetherimide-based foams by....pdf (4,852Mb)
 
10.1002/pc.25029
 
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hdl:2117/122919

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Abbasi, HoomanMés informacióMés informació
Antunes, Marcelo de Sousa PaisMés informacióMés informacióMés informació
Velasco Perero, José IgnacioMés informacióMés informacióMés informació
Document typeArticle
Defense date2018-09-19
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
ProjectESPUMAS POLIMERICAS MULTIFUNCIONALES BASADAS EN TERMOPLASTICOS DE ALTA TEMPERATURA (AEI-MAT2017-89787-P)
Abstract
Significant improvement in electrical conductivity of graphene nanoplatelets-filled polyetherimide (PEI) foams was achieved by simultaneously increasing the porosity and graphene nanoplatelets dispersion. Foams were prepared by means of water vapor-induced phase separation using a concentration of graphene nanoplatelets (GnP) between 1 and 10 wt%. To obtain two sets of foams having different density and porosity, PEI's concentration in N-methyl pyrrolidone (NMP) solvent prior to foaming was set at 15 and 25–30 wt%, respectively. High-power sonication was applied to GnP-NMP suspension before PEI's addition for the foam series with higher porosity (15 wt% PEI). All foams were later characterized in terms of cellular structure, thermal stability, dynamic-mechanical properties, and electrical conductivity. A notable enhancement in electrical conductivity was observed with foaming, especially when increasing the porosity and applying sonication, with foams reaching values as high as 1.7 × 10-1 S/m while maintaining the thermal stability and mechanical performance
CitationAbbasi, H., De Sousa Pais, M., V. J. Enhancing the electrical conductivity of polyetherimide-based foams by simultaneously increasing the porosity and graphene nanoplatelets dispersion. "Polymer composites", 2019, vol. 40, S2 Special Issue: Graphene and Carbon Fibers, p. E1416-E1425. 
URIhttp://hdl.handle.net/2117/122919
DOI10.1002/pc.25029
ISSN0272-8397
Publisher versionhttps://onlinelibrary.wiley.com/doi/10.1002/pc.25029
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  • Departament de Ciència dels Materials i Enginyeria Metal·lúrgica - Articles de revista [961]
  • POLY2 - Polyfunctional polymeric materials - Articles de revista [103]
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