전기방사법을 이용한 TiO2 나노섬유 제조

초록

Titania nanofibers with a typical diameter around of 150nm were successfully prepared by using an electric field-assisted ejection of a solution containing both polymer and titanium tetraisopropoxide. The used polymers of poly(vinyl pyrrolidone) and poly(vinyl acetate) were utilized as structure-directional agents in the electrospinning process. Amorphous TiO2-polymer nanofibers were formed by ejecting the composite solution through a needle under a strong electrical field. After the subsequent calcination in ambient air at 500°C, these composites nanofibers were observed to shrink without changing their fiber-shape morphology and confirmed to be converted into anatase TiO2. Furthermore, the nanofiber diameter could be regulated by varying experimental parameters such as the polymer concentration, the strength of the electrical field, and the feeding rate of the solution.

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