Ultraviolet Irradiation Effect on Polyvinylpyrrolidone/Polyaniline Films with Additives

ABSTRACT

Polyvinylpyrrolidone/polyaniline (PVP/PANI) with additives (TiO₂, ZnO, NaCl and Na₂SO₄) was synthesized. To spread the electric and photoelectric applications of PVP/PANI, its photodegradation under UV irradiation was studied by Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy, water uptake and scanning electron microscopy. Results show that ZnO, TiO₂ and NaCl accelerate the photodegradation, respectively, but Na₂SO₄ stabilized PVP/PANI. The degradation rate of PVP/PANI/tert-butyl alcohol and PVP/PANI/ascorbic acid proved the radical role. Water uptake results show that the power of interactions is in this order: PVP/PANI/Na₂SO₄ > PVP/PANI/TiO₂ > PVP/PANI/ZnO > PVP/PANI > PVP/PANI/NaCl > PVP/PANI/tert-butyl alcohol>PVP/PANI/ascorbic acid.

GRAPHICAL ABSTRACT

KEYWORDS:

• Mineral salt
• nanocomposite
• photodegradation
• polyvinylpyrrolidone/polyaniline
• radical scavenger

Acknowledgements

We would like to thank Dr. Ali Nematollahzadeh for his useful comments.