Process for the surface modification of carbon fibers

Details Process for the surface modification of carbon fibers Process for the surface modification of carbon fibers

D - Textiles, Paper

01

F

18/1, 18/6

D01F 11/10 (2006.01) D01F 11/12 (2006.01)

Patent

CA 1165518

IMPROVED PROCESS FOR THE SURFACE MODIFICATION OF CARBON FIBERS Abstract of the Disclosure An improved continuous hot gas surface modification process for carbon fibers is provided. The carbon fibers under- going such processing are passed for a relatively brief residence time through a surface treatment zone to which continuously is fed nitrogen dioxide and air under conditions which have been found to produce a surprisingly effective surface modification. The resulting carbon fibers exhibit a significantly enhanced surface area and an improved ability to bond to a resinous matrix material while retaining a substantial portion of the tensile strength originally exhibited. When incorporated in a resinous matrix material, a fiber reinforced composite article of enhanced interlaminar shear strength is formed. -1-

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