Abstract
Polyaniline (PANI) and PANI/Ta2O5 composite samples were prepared using chemical oxidative polymerization technique in the presence of hydrochloric acid (HCl) at room temperature. The effect of Ta2O5 on surface morphology and structural changes have been investigated and evaluated by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. The XRD pattern of the PANI and PANI/Ta2O5 confirm the formation of PANI and its composite. The average crystallite size of the PANI is 2.86 nm which is increased to 46.80 nm when Ta2O5 was doped in the PANI matrix. SEM micrographs of the composite confirm the morphological changes in the composite materials. In the electrical conductivity studies, ac conductivity was carried as function of frequency and dc conductivity was studied as a function of temperature. Further to describe the dielectric properties of the PANI and composite, dielectric constant and dielectric loss was studied as a function of frequency.
Highlights
2.1 Preparation of PolyanilineThe polymer composites with conventionally filled were described as the new class of materials which enhances the performance, strength, heat resistance, conductivity of the materials [1]
The broad diffraction peak was observed between diffracted angle 2θ ranges from 26°-30° which is the characteristic peak of polyaniline suggests the amorphous nature of the prepared PANI
The scanning electron microscope (SEM) image of PANI/Ta2O5 reveals that the dopant particles are dispersed in PANI which justifies the successful composite formation and mainly composed of irregularly arranged granular, nonporous, aggregated surface morphologies with diverse sizes
Summary
2.1 Preparation of PolyanilineThe polymer composites with conventionally filled were described as the new class of materials which enhances the performance, strength, heat resistance, conductivity of the materials [1]. The polymer with metal oxide doped composites dramatically showing interest to the researchers due to the surprising hybrid properties derived from the polymer and metal oxide [4,5]. Conducting polymers were attracted towards researcher due to their numerous industrial application such as electrical and use of polymers in electronic devices. The desired properties of the polymer can be prepared by doping suitable composition in the polymer matrix [6,7,8]. One of the great importance in the polymer application is to know how the prepared composites behave in the presence of electric and magnetic field which is a longstanding problem in the field of conducting polymer. The interest in the polymer research was increased to know the enhancement of the electrical conductivity of the conducting polymer when doped and undoped
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