Influence of ion beam and silver nanoparticles on dielectric properties of flexible PVA/PANI polymer composite films

Abstract

In this work, a solution cast technique was used to prepare flexible nanocomposite films of PVA/ PANI/Ag with different concentrations of PANI and AgNPs. The samples were described by X-ray diffraction (XRD), transmission electron microscope (TEM), and infrared spectroscopy, which confirmed the successful synthesis of the nanocomposite films. After that, the PVA/10%PANI/ 6%Ag nanocomposite film was irradiated by different influences of the oxygen ion beam (8 × 1017, 16 × 1017, and 24 × 1017 ions/cm2). The Ac conductivity, dielectric properties, electric modulus, complex impedance behaviour, and the energy density efficiency of the nonirradiated and irradiated films were measured in the frequency range of 100-106 Hz. The results revealed significant changes in these parameters with an increase in concentrations of PANI and Ag nanoparticles inside the host and also with ion beam irradiation. The reported improvements in this study would open the road for appropriating the unirradiated and irradiated nanocomposite films for electromagnetic shielding and optoelectronic applications.

Tuning the ionic conductivity of flexible polyvinyl alcohol/sodium bromide polymer electrolyte films by incorporating silver nanoparticles for energy storage device applications

“…Such kind of variation in the crystallinity of the polymer matrix with the loading of AgNPs has been reported by other researchers. [ 7,33,38–40 ] Since most amorphous samples facilitate ion conduction easily, we expect this sample to show high ionic conductivity.…”

Structural and physical properties of polyaniline/silver oxide/silver nanocomposite electrode for supercapacitor applications

“…In the figure, the peaks intensity of PANI/Ag 2 O‐Ag nanocomposite decreases when adding Ag 2 O and Ag NPs to PANI. This is due to the electrons abundance and therefore, the electrical and the optical properties of the composite are enhanced 27,28 …”

“…Besides, the PANI/Ag 2 O‐Ag nanocomposite pattern also shows peaks at 2θ values ~ (32.3°, 46.6°, and 54.7°), which may be due to the presence of Ag 2 O nanoparticles 32,33 . Further, the average crystal size (D) of Ag nanoparticles is calculated using the Scherrer equation 28 : where L is the X‐ray wavelength ( L = 0.15406 nm), β is the Full width at half maximum (FWHM) of the peak and θ denotes the half angle of diffraction peak (in degrees). The crystal size of Ag nanoparticles at the peak corresponding to the plane (111) is found to be 23.1 nm.…”

“…This is due to the electrons abundance and therefore, the electrical and the optical properties of the composite are enhanced. 27,28 To obtain more information about the production of PANI/Ag 2 O-Ag nanocomposites, an XRD study has been carried out on the prepared PANI and PANI/Ag nanocomposite as shown in Figure 2A,B, respectively. In Figure 2A abroad peaks of the PANI sample are located at 2θ ~16.1 , 20 and 25.03 which correspond to (0 1 1), (0 2 0), and (2 0 0) crystal planes of PANI structure as previously reported in Reference 29.…”

“…31 Besides, the PANI/Ag 2 O-Ag nanocomposite pattern also shows peaks at 2θ values ~(32.3 , 46.6 , and 54.7 ), which may be due to the presence of Ag 2 O nanoparticles. 32,33 Further, the average crystal size (D) of Ag nanoparticles is calculated using the Scherrer equation 28 :…”