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강필현 한국섬유공학회 2021 Fibers and polymers Vol.22 No.11
Polyacrylonitrile (PAN) porous fiber containing titanium dioxide (TiO2) nano particle was fabricated using a wetspinning method. In order to produce continuous wet spun fiber from TiO2 nanoparticle filled PAN solution, the PAN solutionas spin dope was prepared using dimethyl sulfoxide (DMSO) as solvent at various concentrations. We have successfullyproduced PAN/TiO2 porous fibers under conditions such as 15 wt% PAN and 0.5 wt% to 2.0 wt% TiO2. The rheologicalbehavior of the PAN/TiO2/DMSO solution was characterized by oscillatory shear rheology under different conditions,including temperature and concentration. The effect of absolute value of complex viscosity on the wet-spinnability of theTiO2 nano particle filled PAN/DMSO solution was discussed. The PAN/TiO2 fiber was stabilized continuously intemperatures from 250 °C to 300 °C in air and carbonized at 800 °C in N2. The photocatalytic activities against methyleneblue of PAN/TiO2 porous fibers by wet spinning was analyzed by the maximum absorption intensity at 664 nm in the UV-VISspectrum during UV irradiation time and compared with that of the PAN/TiO2 nanofibers prepared by electrospinning.