Abstract:

To study the ultraviolet (UV) protective properties of PAN/TiO2 nanofibrous, TiO2 nanoparticles were added into the PAN solution and mixed PAN/TiO2 nanofibrous films were prepared by electrospinning method. The morphologies and UV protective properties were carried out by scanning electron microscopy and UV transmitance analyzer. The results show that the fiber diameter decreases for the mixed PAN/TiO2 nanofibers. Infrared spectra show that mixed PAN/TiO2 nanofibers also express characteristic absorptio peak of TiO2 besides the characteristic peaks of PAN. The addition of TiO2 enhances UV-protective property of PAN/TiO2 nanofibers. The UV propertive factor (UPF) of pure PAN nanofiber is 30.72, while the UPF of PAN/TiO2 nanofibers range from 1 096.21 to 1 865.49. The UPF valre increases with the increasing of TiO2 mass fraction. When the mass fraction of TiO2 is 0.5%, PAN/TiO2 nanofibers are smoother in surface, smaller in diameter and better in UV-protective property.

Key words: polyacrylonitrile, titania dioxide, nanofiber, ultraviolet protective property