关键词: PAN基碳纤维, 复合材料, 导电发热, 电热性能

Abstract: Carbon fiber is a versatile functional and structural material. The PAN-based carbon fiber produced by wet process has the advantages of uniform heat and stable heat. In order to study the electric properties of PAN based carbon fiber cloth, an electrical heating device is designed and made with PAN-based carbon fiber cloth as the heating material. We test the resistance-temperature characteristic, voltage-temperature relation and time-temperature relation. The result shows that when the device is electrified, the rate of resistance change increases slightly with the increase of temperature, but the change is very small. The device has good thermal stability under low pressure, and the surface temperature is proportional to the voltage and input power. The device temperature rises faster, which reaches thermal equilibrium after 5 minutes of electricity, the temperature fluctuation is less than 0.5 ℃. It is proved that PAN-based carbon fiber cloth can replace resistance wire as heating material. It provides experimental evidence for the popularization and use of PAN-based carbon fiber as heating material for electric heating device.

Key words: PAN-based carbon fiber, composites, electrical heating, electric properties