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Safe Replacement For Asbestos In Nickel/Hydrogen CellsPolyethylene fibers and potassium titanate particles perform as well as asbestos. New material for separators of nickel-hydrogen electrochemical cells offers performance similar to that of asbestos separator material without adverse health effects. In one version, separator contains pure polyethylene fibers, and may or may not contain supplementary latices as bonding agents. In standard wet-laying papermaking process, fibers pressed into mat, then dried. Mat used as is or pressed further in hot calender stack to soften and fuse fibers at crossing points. Treatment reduces porosity and increases resistance of mat to passage of air bubbles under pressure. In alternative version, matrix of 20 to 40 percent polyethylene fibers and 60 to 80 percent potassium titanate particles formed on paper machine, then dried. It, too, can be treated by hot calendering.
Document ID
19930000393
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Scott, William E.
(Miami Univ.)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 7
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
LEW-15051
Accession Number
93B10393
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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