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One-step pretreatment,anodization,is used to activate the polyacrylonitrile (PAN)-based carbon fibers instead of the routine two-step pretreatment,sensitization with SnCl2 and activation with PdCl2.The effect of the anodization pretreatment on the graphitization of PAN-based carbon fibers is investigated as a function of Ni-P catalyst.The PAN-based carbon fibers are anodized in H3PO4 electrolyte resulting in the formation of active sites,which thereby facilitates the following electroless Ni-P coating.Carbon fibers in the presence and absence of Ni-P coatings are heat treated and the structural changes are characterized by X-ray diffraction and Raman spectroscopy,both of which indicate that the graphitization of PAN-based carbon fibers are accelerated by both the anodization treatment and the catalysts Ni-P.Using the anodized carbon fibers,the routine two-step pretreatment,sensitization and activation,is not needed.
One-step pretreatment, anodization, is used to activate the polyacrylonitrile (PAN) -based carbon fibers instead of the routine two-step pretreatment, sensitization with SnCl2 and activation with PdCl2. The effect of the anodization pretreatment on the graphitization of PAN-based carbon fibers is investigated as a function of Ni-P catalyst. PAN-based carbon fibers are anodized in H3PO4 electrolyte resulting in the formation of active sites, which facilitate bars the following electroless Ni-P coating. Carbon fibers in the presence of absence of Ni-P coatings are heat treated and the structural changes are characterized by X-ray diffraction and Raman spectroscopy, both of which indicate that the graphitization of PAN-based carbon fibers are accelerated by both anodization treatment and the catalysts Ni-P. Using the anodized carbon fibers, the routine two-step pretreatment, sensitization and activation, is not needed.