Enhancing the properties of PVDF/MFe2O4; (M: Co–Zn and Cu–Zn) nanocomposite for the piezoelectric optronic applications

Abstract

Polyvinylidene fluoride (PVDF) polymer is considered as an encouraging piezoelectric material whose optical properties need to be enhanced. Zinc ferrite is an excellent photoelectric material, in the present work it was doped separately by (cobalt and copper) ferrite. Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles were synthesized using auto-combustion method and characterized using XRD, FTIR, FESEM and HRTEM. The crystallite size was (28.8, 35.8, 22 and 31) nm for the Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles, while the estimated particle size from HRTEM were 55 nm for the Co-ZnFe2O4 nanoparticles and 75 nm for the Cu-ZnFe2O4. The obtained samples used as PVDF fillers, aiming to improve its optical properties. The optical properties as well as, the piezoelectric response of the prepared PVDF/(Co-ZnFe2O4 and Cu-ZnFe2O4) nanocomposites were investigated. The maximum value for refractive index was related to PVDF/Co-ZnFe2O4 nanocomposite. While, Cu-ZnFe2O4 nanoparticles have limited improvement of the PVDF optical properties. Co-ZnFe2O4 nanoparticles increases the PVDF optical conductivity σopt. four times its original value as well as the dielectric values was increased from 0.05 for neat PVDF to 2. The piezoelectric response of the PVDF polymer is clearly increased by the addition of both Co-ZnFe2O4 and Cu-ZnFe2O4 nanoparticles.

Study the multiferroic properties of BiFeO3/Ni0.1Fe2.9O4 for heavy metal removal

“…The obtained powder was washed several times by distilled water and ethanol and then calcined for 2 h at 550 °C by rate of 5 °C/min. The reaction for the synthesis of Bi FeO 3 could be expressed as follows [24]:…”

“…It is clear that χ M decreases as temperature as well as field intensity increases. By increasing magnetic field intensity, the alignment of dipoles along field direction is increasing in other hand, because of rising temperature, thermal energy increases dipoles disorder, and as a result, magnetic susceptibility decreases gradually until reaching zero (Curie temperature) [24][25][26].…”

Impact of Mn–Ni spinal ferrite nanoparticles on the structural, morphological, surface roughness, and optical parameters of polyvinyl alcohol for optoelectronic applications

“…23 Also, NiCoFe 2 O 4 spinal ferrite was synthesized by a co-precipitation method and then mixed with different weights of PVA (0, 0.2, and 0.5 gm) to enhance their morphology to be possible candidates for magnetic and gas sensors. 20 The optical properties of the PVDF matrix were enhanced after the inclusion of Cu/CoFe 2 O 4 NPs, 24 (Co–Zn)/(Cu–Zn) Fe 2 O 4 , 25 and CaFe 2 O 4 NPs. 26 Also, Ni–Al Fe 2 O 4 NPs were synthesized by a flash auto-combustion method and then inserted in a PANI polymer matrix with different concentrations, and the optical properties were enhanced after ferrite NP insertion into the polymer matrix.…”

Local analysis of crystalline phases and properties of poly(vinylidene fluoride) electrospun composites with BaTiO3 nanorods

“…[17][18][19][20][21][22] On the other hand, adding various nanofillers, such as graphene, [23][24][25][26][27] silver, [28][29][30][31] gold, [32][33][34][35] carbon nanotubes [36][37][38][39][40] and ceramics, 6,[41][42][43][44][45] permits the all-trans conformation (⊎-phase formation) in PVDF to appear, unfortunately with no explanation about the mechanism of ⊎-phase formation. 23,[46][47][48] Related to the effect of adding fillers, it has been proposed that nanofillers serve as nucleation sites for crystallization, promoting the growth of ⊎-phase crystals. This is thought to contribute significantly to the observed enhancement in PVDF ferroelectric properties with nanofiller addition.…”

“…Extreme conditions such as high temperature and pressure or rapid cooling are necessary to develop the improved β ‐phase with enhanced electroactive characteristics 17–22 . On the other hand, adding various nanofillers, such as graphene, 23–27 silver, 28–31 gold, 32–35 carbon nanotubes 36–40 and ceramics, 6, 41–45 permits the all‐ trans conformation ( β ‐phase formation) in PVDF to appear, unfortunately with no explanation about the mechanism of β ‐phase formation 23, 46–48 . Related to the effect of adding fillers, it has been proposed that nanofillers serve as nucleation sites for crystallization, promoting the growth of β ‐phase crystals.…”