Preparation and Mechanism of Cuano-TiO2/PBO Composite Fibers by Photocatalysis Electroless Plating

摘要

Cuano-TiO2/PBO composite fiber with low density,high strength,toughness and conductivity was prepared with a photocatalysis electroless plating method by reduction depositing Cu2+ on the surface of nano-TiO2/PBO composite fiber.The process parameters on the preparation of Cuano-TiO2/PBO composite fiber were optimized by the characterization of surface morphology,phase,composition,pull-out strength and resistivity of Cuano-TiO2/PBO composite fibers using SEM,XRD,EDS,electronic tester of tensile strength and multimeter,respectively.The mechanism of Cu coating nano-TiO2/PBO composite fiber was also discussed in this study.The results showed that Cuano-TiO2/PBO composite fibers were well prepared under the bath composition of CuSO4?5H2O 16g?L-1,KNaC4H4O6?4H2O 15 g?L-1,Na2EDTA?2H2O 24 g?L-1,HCHO 16 ml?L-1,NaOH 14 g?L-1,C10H8N2 24 mg?L-1 and K4Fe(CN)6?H2O 12 mg?L-1 by the UV-light irradiated for 30 min.The diameter,pull-out strength and resistivity of Cuano-TiO2/PBO composite fiber were 20.2 μm,2.25 GPa and 0.02864 Ω?mm2m-1,respectively.Cu2+ ions on the surface of nano-TiO2/PBO composite fiber were reduced to Cu by photo-electrons which were generated of nano-TiO2 under the UV-light irradiated,and the primary Cu layer as a catalytic center promoted the reduction reactions of producing Cuano-TiO2/PBO composite fiber further.