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In situ self cross-linking of polyvinyl alcohol battery separators

Patent ·
OSTI ID:5928404
; ;
A battery separator is produced from a polyvinyl alcohol sheet structure which is subjected to a self-cross-linking process in situ by selective oxidation of the 1,2 diol units present in the polyvinyl alcohol sheet structure. The 1,2 diol units are cleaved to form aldehyde end groups which subsequently cross-link through acetalization of the 1,3 diol units of the polyvinyl alcohol. Selective oxidation is achieved by use of a solution of a suitable oxidizing agent such as periodic acid or lead tetraacetate.
Assignee:
National Aeronautics and Space Administration
Patent Number(s):
US 4154912
OSTI ID:
5928404
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360401 -- Polymers & Plastics-- Preparation & Fabrication-- (-1987)
ALCOHOLS
ALKALI METAL COMPOUNDS
BATTERY SEPARATORS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CROSS-LINKING
FABRICATION
FILMS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDATION
OXYGEN COMPOUNDS
POLYMERIZATION
POLYMERS
POLYVINYLS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
PVA
SYNTHESIS