| 摘要 |
PURPOSE:To enable measurement of carbon fibers, etc. for their surface characteristics on the manufacturing line, by detecting a current value with selection of carbon fiber and graphite fiber which have undergone surface oxydation processes as an electrode on one side and changing a electric potential in an electrolytic solution and within the specified voltage. CONSTITUTION:Electrolytic solution, for instance, aqueous solution of phosphoric acid is admitted in an electrolytic solution cell 4. Then, a surface oxidation treated carbon fiber or a tow of a plurality of the fibers are allowed to touch a dielectric roller 2 and conveyed continuously to the electrolytic solution and taken up by non-dielectric roller 3. Further, a counter electrode 5, for instance, platinum electrode and the reference electrode, for instance, Ag/AgCl electrode are installed. Then, a scanning potential is applied without exceeding the electrolytic potential of the electrolytic solution and current-potential curve is detected with a polarographic meter 7. Then, from change of current values oxidation conditions of carbon and graphite fibers are detected. As the oxidation condition of the fibers can be detected continuously, an excellent composite can be obtained from these fibers.
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