Process for producing polybenzimidazole fabrics for use in fuel
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United States of America Patent
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Mar 28, 2000
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N/A
app pub date -
Jul 16, 1997
filing date -
Jul 16, 1997
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Expired
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Abstract
A method for producing polybenzimidazole (PBI) fabrics for use as fuel cell or battery electrolytes by soaking a sulfonated or non-sulfonated PBI fabric in an acid solution, whereby the fibers of the fabric become swollen with the acid solution; and drying the fabric to remove residual water or methanol and concentrating the acid.
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