Carbon Fiber Paper And Their Functions

The methods of preparation of Activated Carbon Fiber (ACFP) were studied firstly. Under the fixed conditions of making pulp, The influence of two important parameters on the properties of ACFP, the amount of dispering agent PAM and the ratio of ACF to PULP, was investigated using permeability, tensile strength, BETSSA, and PSD. The results showed that the amount of PAM has no influence on the permeability of AC FP.ho we ver, the tensile strength of ACFP increases with the increasing amount of PAM. The structure of ACFP is unorganized by SEM observation. The adsorption principle of ACFP is micropore volume filling according to Nitrogen adsorption isotherm plot.Secondly, surface treatment of ACF by anode oxidation using NH4H2PO4 electrolyte has beeen carried out. The results indicated that The concentration of electrolyte is much more important than the other factors and the better condition of anode oxidation treatment is as follows: the concentration of electrolyte 3%(wt%), the electric current intensity 1.6A, oxidation time 150s. Then, the comparison of structure between as-received ACF and oxidized ACF were characterized by XPS, XRD, SEM, BETSSA and PSD methods. The different structure of ACF and oxidized ACF indicated that OACF has higher adsorption capacity than ACF and the mechanical properties of ACFP by surface treatment was improved. In the course of anode oxidation, amorphous carbon atoms were etched under the suitable conditions at first, then, crystallitic carbon atoms would be etched as the surface treatment conditions becoming more rigorous.Nano-TiO2 was added to ACFP. Nano-TiO2 made the permeability and tensile strength of ACFP decrease. By comparing to the adsorption amount of benzene before and after reflection of ultra-violet, nano-TiO2 showed high photocataly tic capacity. These results demonstrated that ACF/ TiO2 composite paper showed coordinative effection.