Synergistic catalytic effect of Ti-B on the graphitization of polyacrylonitrile-based carbon fibers

摘要

A novel carbon fiber pretreatment is proposed. PAN-based carbon fibers are first anodized in a H3PO4 electrolyte to achieve an active surface, and then coated with Ti-B catalyst by immersion of the carbon fibers in a uniformly dispersed H3BO3-doped TiO2 sol. The as-treated carbon fibers are then graphitized at 2400 °C for 2 h. The effects of the anodization and the Ti-B catalyst on the graphitization are investigated.