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dc.date.accessioned2016-08-24T17:54:45Z
dc.date.available2016-08-24T17:54:45Z
dc.date.issued2008-04-22
dc.identifier.urihttp://hdl.handle.net/10919/72581
dc.description.abstractSulfonated polymers are made by the direct polymerization of a sulfonated monomer to form the sulfonated polymers. The types of sulfonated polymers may include polysulfones or polyimides. The sulfonated polymers can be formed into membranes that may be used in proton exchange membrane fuel cells or as ion exchange membranes. The membranes formed from the sulfonated polymers exhibit improved properties over that of Nafion®. A heteropoly acid may be added to the sulfonated polymer to form a nanocomposite membrane in which the heteropoly acid is highly dispersed. The addition of a heteropoly acid to the sulfonated polymer increases the thermal stability of the membrane, enhances the conductivity above 100° C., and reduces the water uptake of the membrane.
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherUnited States Patent and Trademark Office
dc.titleIon-conducting sulfonated polymeric materials
dc.typePatent
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/29/617/073/0.pdf
dc.date.accessed2016-08-19
dc.type.dcmitypeText
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.
dc.contributor.inventorMcGrath, James E.
dc.contributor.inventorWang, Feng
dc.contributor.inventorKim, Yu-Seung
dc.contributor.inventorHickner, Michael A.
dc.date.filed2001-09-20
dc.identifier.applicationnumber9956256
dc.subject.uspc429/209
dc.subject.uspcother429/212
dc.subject.uspcother429/213
dc.subject.uspcother521/27
dc.subject.uspcother521/33
dc.subject.uspcother528/391
dc.subject.uspcother528/363
dc.subject.uspcother528/364
dc.subject.uspcother528/373
dc.subject.cpcB01D71/82
dc.subject.cpcB01D69/141
dc.subject.cpcB01D71/64
dc.subject.cpcB01D71/68
dc.subject.cpcC08G73/10
dc.subject.cpcC08G75/23
dc.type.patenttypeutility
dc.identifier.patentnumber7361729


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