FABRICATION AND PHOTOCATALYTIC ACTIVITY OF POROUS RECYCLED CELLULOSE TRIACETATE NANOFIBROUS MEMBRANES EMBEDDED WITH TIO_2

摘要

In this study, we investigated the recycling of cellulose triacetate (CTA) membranes and then combined the CTA dopes with TiO_2 powder. Besides, via electrospinning technique, we produced porous structure fiber membranes which have potential application for filtration and protection from organic compounds, air-cleaning, and antibacterial materials. The ultrafine porous recycled CTA fibers were produced by electrospinning with mixed solvent system. Also, combining the ideas of vapor induced phase separation, it was capable to derive uniform porous structure. Due to the porous structure was induced by phase separation resulting from the rapid evaporation of solvent during the electrospinning process, we also discussed the effect of the boiling point in the solvent system and of temperature. Moreover, after adding TiO_2 into the CTA precursor solution, we derived the nanofibrous hybrids. Expecting the porous fiber morphology in addition to catch organic compounds, would also raise the reactivity, we used FE-SEM to observe the porous structure. Sequentially, we used TEM to examine whether TiO_2 were successfully embedded. Also, the functionality was evaluated by antibacterial and photodegradation experiment. Therefore, we derived the hybrid that had porous structure which could catch organic compounds and with the adding of TiO_2, the composite would have the function of antimicrobial and the ability to degrade organic compounds.