PAN基碳化纤维的电性能及应用

Electrical property and application of PAN-based carbonaceous fibers

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 carbonaceous fibers for antistatic application were prepared at carbonization temperature from 700 to 1300℃.Chemical composition,microstructure and electrical resistivity of the carbonaceous fibers were characterized using elemental analyzer,X-ray diffractometer and high precision electrical resistance tester;surface electrical resistivity of carbonaceous fiber/resin composite coatings was measured using insulation tester.Results indicated that the electrical resistivity of carbonaceous fibers decreased drastically from 1.12 to 1.95×10-3Ω·cm due to the large amount of turbostratic graphite structures formed in carbonization process.Surface electrical resistivity of antistatic coatings prepared with carbonaceous fibers was adjustable in the range of 104 to 107Ω to satisfy specific applications.