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In situ self cross-linking of polyvinyl alcohol battery separatorsA battery separator was produced from a polyvinyl alcohol sheet structure which was subjected to an in situ, self crosslinking process by selective oxidation of the 1,2 diol units present in the polyvinyl alcohol sheet structure. The 1,2 diol units were cleaved to form aldehyde end groups which subsequently crosslink through acetalization of the 1,3 diol units of the polyvinyl alcohol. Selective oxidation was achieved using a solution of a suitable oxidizing agent such as periodic acid or lead tetraacetate.
Document ID
19790017310
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Philipp, W. H. (NASA Lewis Research Center Cleveland, OH, United States)
Hsu, L. C. (NASA Lewis Research Center Cleveland, OH, United States)
Sheibley, D. W. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
May 15, 1979
Subject Category
Energy Production And Conversion
Report/Patent Number
Patent Application Number: US-PATENT-APPL-SN-897829
Patent Number: NASA-CASE-LEW-12972-1
Patent Number: US-PATENT-4,154,912
Accession Number
79N25481
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-LEW-12972-1|US-PATENT-4,154,912
Patent Application
US-PATENT-APPL-SN-897829

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