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    • 4. 发明授权
    • Carbon fibers and process for preparing same
    • 碳纤维及其制备方法
    • US5462799A
    • 1995-10-31
    • US293817
    • 1994-08-22
    • Masanobu KobayashiMotoi ItohYoji MatsuhisaKazuharu Shimizu
    • Masanobu KobayashiMotoi ItohYoji MatsuhisaKazuharu Shimizu
    • D01F11/14D01F11/16D02G3/00
    • D01F11/16D01F11/14Y10T428/2913Y10T428/2918Y10T428/2933Y10T428/2964Y10T428/2971
    • Carbon fibers with a surface oxygen concentration (O/C ratio) of 0.20 or less as measured by X-ray photoelectron spectroscopy, a surface concentration of hydroxyl groups (C--OH/C ratio) of 0.5% or greater as measured by chemical modification X-ray photoelectron spectroscopy and a surface concentration of carboxylic groups (COOH/C ratio) of 2.0% or less as measured by chemical modification X-ray photoelectron spectroscopy, and comprising applied as a sizing agent an aliphatic compound which has multiple epoxy groups or an aromatic compound which has multiple epoxy groups, the number of atoms between the epoxy groups and an aromatic ring being 6 or greater. They are prepared by electrolyzing a carbon fiber in an alkaline aqueous solution, or electrolyzing a carbon fiber in an acidic aqueous solution followed by washing with an alkaline aqueous solution, and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater. Alternatively, they are prepared by electrolyzing a carbon fiber in an aqueous solution of an ammonium salt and then applying a sizing agent of an aliphatic compound with multiple epoxy groups or an aromatic compound with multiple epoxy groups in which the number of atoms between the epoxy groups and an aromatic ring is 6 or greater.
    • 通过X射线光电子能谱测定,表面氧浓度(O / C比)为0.20以下的碳纤维,通过化学改性测定的羟基的表面浓度(C-OH / C比)为0.5%以上 通过化学修饰X射线光电子能谱法测定的X射线光电子能谱和羧基的表面浓度(COOH / C比)为2.0%以下,并且包括作为上浆剂应用具有多个环氧基的脂肪族化合物或 具有多个环氧基的芳族化合物,环氧基和芳香环之间的原子数为6以上。 它们是通过在碱性水溶液中电解碳纤维,或在酸性水溶液中电解碳纤维,然后用碱性水溶液洗涤来制备的,然后施加具有多个环氧基或芳香族的脂族化合物的施胶剂 具有多个环氧基的化合物,其中环氧基和芳环之间的原子数为6以上。 或者,它们通过在铵盐水溶液中电解碳纤维,然后将具有多个环氧基的脂肪族化合物或具有多个环氧基的芳族化合物的施胶剂,其中环氧基团之间的原子数 芳环为6以上。