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采用连续预氧化碳化法,在700～1300℃制备了聚丙烯腈(PAN)基碳化纤维。使用元素分析仪、X射线衍射仪和高精度电阻仪检测了碳化纤维的化学成分、物相结构和体电阻率;使用绝缘电阻仪测试了碳化纤维/树脂复合涂层的表面电阻率。研究结果表明,随着碳化温度的升高,纤维的碳元素含量增大,同时纤维中形成大量类石墨结构,增强了纤维的导电性,碳化纤维的电阻率由1.12Ω.cm急剧下降至1.95×10-3Ω.cm;在树脂中添加短切碳化纤维制备的防静电复合涂层的表面电阻率可在104～107Ω之间调整。
Polyacrylonitrile (PAN) -based carbon fibers were prepared at 700 ~ 1300 ℃ by continuous pre-oxidation carbonization. The chemical composition, phase structure and bulk resistivity of the carbonized fiber were measured by elemental analyzer, X-ray diffraction and high-precision resistance meter. The surface resistivity of the carbonized fiber / resin composite coating was tested by using insulation resistance tester. The results show that as the carbonization temperature increases, the carbon content of the fiber increases, while a large number of graphite-like structures are formed in the fiber, which enhances the conductivity of the fiber. The resistivity of the carbon fiber decreases sharply from 1.12Ω.cm to 1.95 × 10-3Ω.cm; The surface resistivity of the antistatic composite coating prepared by adding chopped carbon fiber in the resin can be adjusted between 104 and 107Ω.