| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a surface treatment method of a carbon fiber bundle that can produce a carbon fiber bundle having good adhesiveness to a matrix resin and being excellent in composite characteristics, especially in interlaminar shear strength (ILSS), to provide a method for producing a carbon fiber bundle and to provide a carbon fiber.SOLUTION: The surface treatment method of a carbon fiber bundle comprises: subjecting a carbon fiber bundle to electrolytic oxidation treatment with an acidic or alkaline aqueous solution; and subjecting the same to surface treatment with an ozone solution. Preferably, the application current of electrolytic oxidation treatment is not less than 10C/g to not more than 50C/g, and the ozone concentration of the ozone solution is not less than 10 mg/L to not more than 30 mg/L. The method for producing a carbon fiber bundle comprises: heating and drying the carbon fiber bundle produced by the surface treatment method; and adding a sizing agent. The carbon fiber bundle produced by the method is excellent in composite characteristics.</p> |
