Electrolytic method for after-treatment of carbon fiber

Details Electrolytic method for after-treatment of carbon fiber Electrolytic method for after-treatment of carbon fiber

1988-06-09

1989-09-19

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20415715, 20415742, 4234471, 4234472, C25

Patent

active

048678520

ABSTRACT:
A method for after-treatment of carbon fiber, which comprises by electrolytic oxidation treatment in an aqueous solution having an ammonium ion concentration of 0.2 to 4.0 mol/l and a pH of at least 7 using the carbon fiber as an anode, followed by treating the resulting fiber in water with an ultrasonic wave of at least 20 kHz frequency at an intensity satisfying the condition: ##EQU1## wherein, F is the frequency (kHz) and T is the treatment period (min) provided that T>0.1.

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