Effects of precursor and acid catalyst concentrations on the viscosity of sol solutions and morphology of TiO2/PVP composite nanofibers

In this work, effects of polymer, precursor and acid catalyst amounts on the stability of non-hydrolytic sol-gel solutions were studied by preparation of different sol solutions with various TIP/glacial acetic acid ratios in 2-propanol with 5 wt% PVP. Rheometry measurements of sol solutions showed decrease of viscosity upon addition of TIP to polymer solutions with constant polymer concentration. SEM analysis of as-spun electrospinning TiO2/PVP nanofibers showed the appropriate composition of TIP/AcOH/PVP ternary system in 2-propanol for the lowest average fiber diameters