Abstract: Cu/n-TiO₂/PBO composite fibers were prepared with nano-TiO₂ deposited on PBO fibers by dipping,
and then Cu deposited on nano-TiO₂ thin films by electroless plating. The main effective factors on the nano-TiO₂ and Cu depositing rates were studied. The results show that the concentration ratio ofnano-TiO₂ and coupling reagent works as the key effective factor on the nano-TiO₂ depositing rate. Thenano-TiO₂ is well deposited on PBO fibers when the concent ration ratio is 1:1. 2. The main effective factors on the Cu depositing rate are bath composition, reaction time and reaction temperature. Cu is well deposited on then-TiO₂/PBO composite fibers under the condition of CuSO₄·5H₂O 12 g ·L^-1,KNaC₄H₄ O₆ 8 g·L^-1,HCHO 6 mL ·L^-1, NaOH 10 g·L^-1, reaction temperature 50℃ and reaction time 20 min.