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<p>The present study investigates the formation of Poly (<i>O</i>-toluidine) (POT)—ZnO nanocomposites through the incorporation of ZnO to the POT with varying weight percentage by <i>In—situ</i> chemical polymerization method. The main objective is to develop POT-ZnO nanocomposites and to analyse the impacts of ZnO on structural, thermal stability, dielectric properties, and DC electrical conductivity. Advancement in crystalline structure with increasing composition of ZnO was observed by X-ray diffraction (XRD). Fourier Transform Infrared Spectroscopy (FTIR) results confirm the presence of all composites materials without any impurities. Scanning electron microscopy (SEM) analysis images shows that PZnO75 has uniform distribution of composites. Thermogravimetric analysis (TGA) results point out that the thermal stability of the composite strengthens through an increase in the wt% of ZnO, which leads to a large number of saturated bonds. Dielectric constant (ε´ ̇) increases by the factor of temperature and dopant weight percentage at lower frequencies. Ionic conductivity due to ZnO is another fact for dielectric loss. PZnO75 has the highest ε' (42 F/m at 120&#xa0;°C) because it features a greater number of free charges, forming an extensive range of space charge polarization which is advantageous for energy storage. The DC conductivity at temperature ranges from 60 to 120&#xa0;°C was observed to be stable for POT-ZnO nanocomposite. The observed improvement in the sample suggests PZnO75 is a promising material for energy storage and electronics devices such as transistors, resistors, and diodes.</p>

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Investigation on material characterization, dielectric behaviour and electrical conductivity of ZnO-poly (O–toluidine) nanocomposites

  • 期刊论文

  • 发表日期：

    2025年3月25日

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  • H. Praveen,
  • V. GirishChandran

摘要

The present study investigates the formation of Poly (O-toluidine) (POT)—ZnO nanocomposites through the incorporation of ZnO to the POT with varying weight percentage by In—situ chemical polymerization method. The main objective is to develop POT-ZnO nanocomposites and to analyse the impacts of ZnO on structural, thermal stability, dielectric properties, and DC electrical conductivity. Advancement in crystalline structure with increasing composition of ZnO was observed by X-ray diffraction (XRD). Fourier Transform Infrared Spectroscopy (FTIR) results confirm the presence of all composites materials without any impurities. Scanning electron microscopy (SEM) analysis images shows that PZnO75 has uniform distribution of composites. Thermogravimetric analysis (TGA) results point out that the thermal stability of the composite strengthens through an increase in the wt% of ZnO, which leads to a large number of saturated bonds. Dielectric constant (ε´ ̇) increases by the factor of temperature and dopant weight percentage at lower frequencies. Ionic conductivity due to ZnO is another fact for dielectric loss. PZnO75 has the highest ε' (42 F/m at 120 °C) because it features a greater number of free charges, forming an extensive range of space charge polarization which is advantageous for energy storage. The DC conductivity at temperature ranges from 60 to 120 °C was observed to be stable for POT-ZnO nanocomposite. The observed improvement in the sample suggests PZnO75 is a promising material for energy storage and electronics devices such as transistors, resistors, and diodes.