Design and characterization of novel ternary nanocomposite (rGO-MnO2-PoPDA) product and screening its dielectric properties

• Published in: International journal on interactive design and manufacturing Vol. 17; no. 5; pp. 2387 - 2401
• Main Authors: Mohammed, Leqaa A., Majeed, Abdulwahhab H., Hammoodi, Omar G., Prakash, Chander, Alheety, Mustafa A., Buddhi, Dharam, Dadoosh, Safaa A., Mohammed, Israa K.
• Format: Journal Article
• Language: English
• Published: Paris Springer Paris 01.10.2023; Springer Nature B.V
• Subjects: Aqueous solutions; CAE) and Design; Carbon; Computer-Aided Engineering (CAD; Diameters; Dielectric properties; Electrical resistivity; Electronics and Microelectronics; Energy storage; Engineering; Engineering Design; Graphene; Industrial Design; Instrumentation; Insulators; Manganese dioxide; Mechanical Engineering; Medical equipment; Nanocomposites; Nanomaterials; Nanorods; Original Paper; Phenylenediamine; Polymers; Synthesis; Temperature; Electrical conductivity; phenylenediamine; PoPDA; Dielectric properties; nanocomposite; Poly; Ternary nanocomposite (rGO-MnO; Binary (rGO-MnO
• ISSN: 1955-2513; 1955-2505
• DOI: 10.1007/s12008-022-01020-x

In this study, a ternary nanocomposite comprising reduced graphene oxide (rGO), manganese oxide nanorods (MnO 2 ), and poly (o-phenylenediamine) (PoPDA) was produced. FTIR, XRD, EDX, SEM, and TEM were used to characterize the synthons and the rGO-MnO 2 -PoPDA nanocomposite. The characterizations revealed that rGO was made up of nanosheets and MnO 2 was made up of nanorods with diameters ranging from 20 to 40 nm, while the polymer was made up of random shapes and sizes. The characterizations also demonstrated the success of the synthesized nanocomposite, as several measurements confirmed the existence of the three components in the final product (rGO-MnO 2 -PoPDA). In addition, films were made from PVA with the nanocomposite (rGO-MnO 2 -PoPDA/PVA) at various weight percentages (1–5%). For these synthesized films, the dielectric properties of real (ε′), imaginary (ε′′), and electrical conductivity (ac) were investigated as a function of frequency. The study proved that the real and imaginary permittivity were at their highest value at the lowest frequency and then began to decrease gradually when the frequency increased, while the electrical conductivity recorded a gradual increase with the increase in frequency. Where an increase in the value of electrical conductivity is observed from (1.8300E-05 to 0.000102) with an increase in the ratio of rGO-MnO 2 -PoPDA for films from (1 to 5%) at the same frequency (2 MHz). Also, an increase in conductivity can be observed from (1.76839E-05 to 0.000102) when increasing the frequency from (10 kHz to 2 MHz) for the same film (5%). Through the study of dielectric properties, the emergence of the transition (insulators–semiconductors) was observed when the amount of the material by weight increased from 1 to 5%.