Nadia A. Ali, Salma M. Hassan, and Seena I. Huseen
Abstract
Conducting Polyaniline/Silver (PANI/Ag) nanocomposite was synthesized by placing nano particle of silver in polymerization mixture of aniline hydrochloride with ammonium peroxydisulfate in acidic medium (2M of HNO3) by chemical oxidation polymerization. XRD image shows a nanoparticular structure of silver which is well dispersed in the polyaniline matrix and with that of face-centered-cubic form of metallic silver. DTA results confirmed the weight loss at 70°C. The A.C- conductivities, dielectric permittivity (ε') of (PANI/Ag) nanocomposite and pure PANI have been measured in frequency range from(103-106) kHz. The electrical conductivity of the (PANI/Ag) nanocomposite is higher than pure PANI. The variation of frequency exponents in this blend suggests that AC-conductivity is attributed to correlated barrier hopping mechanism. At all frequencies, the ε' value for (PANI/Ag) nanocomposite is higher than that for pure one. The higher dielectric constant of the PANI/Ag nanocomposites indicates their better ability to store electric potential energy under the influence of alternative electric field.
The D.C conductivity of (PANI/Ag) nanocomposites have been measured in the temperature range from (298- 433)K indicated that the Ag nanoparticles increased the electrical conductivity of polyaniline nanocomposites as compared to pure aniline.
Publication Date
3/22/2017
Publisher
International Journal of Applied Engineering Research
سيناء ابراهيم حسين | Seenaa Ibraheim Hussein | 4750