Improving the Physical Properties of Polyvinyl Alcohol (PVA)-Melanin Doping

Document Type : Original Article


1 Cairo University, Faculty of Science, Biophysics Department, Egypt,

2 King Saud University, College of Science, Physics & Astronomy Dept.,11451Riyadh, Kingdom Saudi Arabia


The Polyvinyl alcohol (PVA) is an artificial polymer that used in many medical applications but it has a few disadvantages that can overcome with the addition of chemical compounds.
The present study aimed to investigate the efficacy of melanin to improvement the properties biopolymer PVA by doping with of melanin and reinforce the PVA electrical, optical and mechanical properties to prevent it from deformation with time or temperature. In the present work, dielectric relaxation and spectrophotometric techniques were used to characterize the biopolymer PVA doped melanin of different concentration. Reduction of dielectric constant of PVA accompanied with increased in conductivity with the doped melanin concentration. Moreover, relaxation times dropped with an increase of melanin content in PVA. A small shift in Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy of PVA due to increasing the concentration of melanin that caused to increase OH in PVA. A behavior can be used in electronic industries and medical applications.


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