Method for making carbon microfibers
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United States of America Patent
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Nov 26, 1985
Issued Date -
N/A
app pub date -
Jun 21, 1984
filing date -
Oct 1, 1982
priority date (Note) -
Expired
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Abstract
A continuous fiber composite having carbon microfibers dispersed in the resin filling the interstices between the continuous fibers to enhance the transverse properties of the composite. The carbon microfibers are made by soaking carbon fibers in an intercalating acid solution comprising a mixture of fuming nitric and sulfuric acid to weaken the intercrystallite bonds. Gentle stirring of solution separates the carbon microfibers from the host fibers. The microfibers are then separated from the intercalating acid solution and washed to remove the residual acid.
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