보문 : ZnO와 TiO2 함유 복합나노섬유의 제조와 유해물질분해 성능 평가 = Transactions : Fabrication of ZnO and TiO2 Nanocomposite Fibers and Their Photocatalytic Decomposition of Harmful Gases

다국어 초록 (Multilingual Abstract)

This research investigates the application of ZnO (zinc oxide) nanoparticles and TiO2 (titanium dioxide) nanoparticles to polypropylene nonwoven fabrics via an electrospinning technique for the development of textile materials that can decompose harmful gases. To fabricate uniform ZnO nanocomposite fibers, two types of ZnO nanoparticles were applied. Colloidal TiO2 nanoparticles were chosen to fabricate TiO2 nano- composite fibers. ZnO/poly(vinyl alcohol) (PVA) and TiO2/PVA nanocomposite fibers were electrospun under a variety of conditions that include various feed rates, electric voltages, and capillary diameters. The morphology of electrospun nanocomposite fibers was examined with a field-emission scanning electron micro- scope and a transmission electron microscope. Decomposition efficiency of gaseous materials (formaldehyde, ammonia, toluene, benzene, nitrogen dioxide, sulfur dioxide) by nanocomposite fiber webs with 3wt% nano- particles (ZnO or TiO2) and 7g/m2 web area density was assessed. This study shows that ZnO nanoparticles in colloid were more suitable for fabricating nanocomposite fibers in which nanoparticles are evenly dispersed than in powder. A heat treatment was applied to water-soluble PVA nanofiber webs in order to stabilize the electrospun nanocomposite fibrous structure against dissolution in water. ZnO/PVA and TiO2/PVA nanofiber webs exhibited a range of degradation efficiency for different types of gases. For nitrogen dioxide, the degradation efficiency was 92.2% for ZnO nanocomposite fiber web and 87% for TiO2 nanocomposite fiber web after 20 hours of UV light irradiation. The results indicate that ZnO/PVA and TiO2/PVA nanocomposite fiber webs have possible uses in functional textiles that can decompose harmful gases.