Nafion–clay nanocomposite membranes: Morphology and properties

Handle URI:
http://hdl.handle.net/10754/598932
Title:
Nafion–clay nanocomposite membranes: Morphology and properties
Authors:
Herrera Alonso, Rafael; Estevez, Luis; Lian, Huiqin; Kelarakis, Antonios; Giannelis, Emmanuel P.
Abstract:
A series of Nafion-clay nanocomposite membranes were synthesized and characterized. To minimize any adverse effects on ionic conductivity the clay nanoparticles were H+ exchanged prior to mixing with Nafion. Well-dispersed, mechanically robust, free-standing nanocomposite membranes were prepared by casting from a water suspension at 180 °C under pressure. SAXS profiles reveal a preferential orientation of Nafion aggregates parallel to the membrane surface, or normal plane. This preferred orientation is induced by the platy nature of the clay nanoparticles, which tend to align parallel to the surface of the membrane. The nanocomposite membranes show dramatically reduced methanol permeability, while maintaining high levels of proton conductivity. The hybrid films are much stiffer and can withstand much higher temperatures compared to pure Nafion. The superior thermomechanical, electrochemical and barrier properties of the nanocomposite membranes are of significant interest for direct methanol fuel cell applications. © 2009 Elsevier Ltd. All rights reserved.
Citation:
Herrera Alonso R, Estevez L, Lian H, Kelarakis A, Giannelis EP (2009) Nafion–clay nanocomposite membranes: Morphology and properties. Polymer 50: 2402–2410. Available: http://dx.doi.org/10.1016/j.polymer.2009.03.020.
Publisher:
Elsevier BV
Journal:
Polymer
KAUST Grant Number:
KUS-C1-018-02
Issue Date:
May-2009
DOI:
10.1016/j.polymer.2009.03.020
Type:
Article
ISSN:
0032-3861
Sponsors:
We acknowledge the financial support of the Cornell Fuel Cell Institute funded by DOE. EPG acknowledges the support of Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorHerrera Alonso, Rafaelen
dc.contributor.authorEstevez, Luisen
dc.contributor.authorLian, Huiqinen
dc.contributor.authorKelarakis, Antoniosen
dc.contributor.authorGiannelis, Emmanuel P.en
dc.date.accessioned2016-02-25T13:43:58Zen
dc.date.available2016-02-25T13:43:58Zen
dc.date.issued2009-05en
dc.identifier.citationHerrera Alonso R, Estevez L, Lian H, Kelarakis A, Giannelis EP (2009) Nafion–clay nanocomposite membranes: Morphology and properties. Polymer 50: 2402–2410. Available: http://dx.doi.org/10.1016/j.polymer.2009.03.020.en
dc.identifier.issn0032-3861en
dc.identifier.doi10.1016/j.polymer.2009.03.020en
dc.identifier.urihttp://hdl.handle.net/10754/598932en
dc.description.abstractA series of Nafion-clay nanocomposite membranes were synthesized and characterized. To minimize any adverse effects on ionic conductivity the clay nanoparticles were H+ exchanged prior to mixing with Nafion. Well-dispersed, mechanically robust, free-standing nanocomposite membranes were prepared by casting from a water suspension at 180 °C under pressure. SAXS profiles reveal a preferential orientation of Nafion aggregates parallel to the membrane surface, or normal plane. This preferred orientation is induced by the platy nature of the clay nanoparticles, which tend to align parallel to the surface of the membrane. The nanocomposite membranes show dramatically reduced methanol permeability, while maintaining high levels of proton conductivity. The hybrid films are much stiffer and can withstand much higher temperatures compared to pure Nafion. The superior thermomechanical, electrochemical and barrier properties of the nanocomposite membranes are of significant interest for direct methanol fuel cell applications. © 2009 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipWe acknowledge the financial support of the Cornell Fuel Cell Institute funded by DOE. EPG acknowledges the support of Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST).en
dc.publisherElsevier BVen
dc.subjectMontmorilloniteen
dc.subjectNafionen
dc.subjectNanoclayen
dc.titleNafion–clay nanocomposite membranes: Morphology and propertiesen
dc.typeArticleen
dc.identifier.journalPolymeren
dc.contributor.institutionCornell University, Ithaca, United Statesen
kaust.grant.numberKUS-C1-018-02en
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