Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Abstract

This work aims to develop a multifunctional PMMA/CoFe 2 O 4 polymeric film of low loss dielectric constant, high magnetic properties, and perceptible terahertz shielding effectiveness. Pure cobalt ferrite magnetic nanoparticles (CoFe 2 O 4 MNPs) were prepared by a facile-modified solution deposition method. Then, the nanoparticles were loaded to poly (methyl methacrylate) of different ratios (x = 0, 5, 10, 15, and 20 wt%) to synthesize films by evaporative casting technique. X-ray diffraction (XRD) evidenced the formation of CoFe 2 O 4 MNPs in the cubic spinal structure. The FTIR confirmed the interaction of CoFe 2 O 4 MNPs with PMMA chains. Compared to the pure PMMA, the PMMA/CoFe 2 O 4 nanocomposites were more thermally stable, as evidenced by thermogravimetric analysis, (TGA) and differential scanning calorimetry (DSC). The micrograph images by FESEM unraveled that CoFe 2 O 4 MNPs have formed in different geometrical shapes (nanocubes, nanotubes, and nano oval). The values of the band gap energy were computed by the absorption spectra fitting (ASF) method. It varied from 4.94 to 4.68 eV, as the CoFe 2 O 4 MNPs contents were changed from 0 to 20 wt%. Compared to host PMMA, the dielectric permittivity was enhanced, while the dielectric loss was slightly decreased. Therefore, the prepared film can be employed as a passive component in electronic circuits, namely capacitors and supercapacitors. The shielding effectiveness (SE) was found to be improved with frequency and CoFe 2 O 4 content, reflecting the applicability of PMMA/CoFe 2 O 4MNPs films in terahertz shielding. The magnetic parameters were investigated by a vibrating sample magnetometer (VSM) and were found to increase with CoFe 2 O 4 content, which could be used as a flexible film in magnetic applications.

Nanosynthesis and Characterization of Cu1.8Se0.6S0.4 as a Potential Cathode for Magnesium Battery Applications

“…The cubic structure was further established by SAED patterns, Figure 2d, which illustrate the bright spots and diffraction rings. The interplanar spacing was evaluated by attached software to the HRTEM using the previously reported equations, 43 and rings were labeled (220), ( 111), (200), and (311) compared to the standard file. The data are in line with the XRD data.…”

Application of the Zn0.5Mn0.5Fe2O4–PMMA nanocomposite for efficient removal of complex organic pollutants

“…However, the mechanical properties of these ferrites, including brittleness, weight, potential oxidation, and low strength, along with detrimental interface reactions, restrict their efficient application. 26 Modifying the surface of Zn-MnFe 2 O 4 NCPs with certain polymers can improve their magnetic, structural morphological, and electrical properties and further facilitate the retrieving process of the adsorbents. 27 In addition, Zn-MnFe 2 O 4 is prone to oxidation of the particles; therefore, surface modification of magnetic NCPs with a specific ligand would be necessary.…”

“…However, PMMA is typically a non-conducting and nonmagnetic polymer. In contrast, zinc manganese ferrite exhibits a high dielectric constant (e 1 ) and low dielectric loss (e 2 ), 29 and this combination has been implemented in cobalt-based ferrite as xCoFe 2 O 4n -PMMA for industrial applications, 26,30 but the utilization of Zn-MnFe 2 O 4 NCP-PMMA is not yet explored. Therefore, by incorporating Zn-MnFe 2 O 4 NCPs into PMMA, it becomes possible to integrate electrical and/or magnetic properties into soft PMMA matrices.…”

“…In this study, polymethylmethacrylate (PMMA) was chosen for its low dielectric constant, transparency in the visible spectrum, and its ability to form ultrathin, cohesive films. 26 PMMA's potential as an immobilization agent for Zn-Fe ferromagnetic NCPs was explored, to expedite the effective removal of complex toxic contaminants from aqueous solutions. The primary objective of this study was to investigate the suitability of Zn-MnFe 2 O 4 NCP-PMMA to streamline the removal process of complex toxic organic contaminants from aqueous solutions, offering a promising avenue for environmental remediation efforts.…”

An investigation of structural, optical, and electrical properties of poly(3‐hexylthiophene)/reduced graphene oxide nanocomposites for electronic and optoelectronic applications

“…Generally, adding inorganic nanofillers to the polymer matrix enhances the physical and chemical properties of the hosting matrix 12–14 or even induces new properties 15,16 . Several attempts have been made to enhance the mobility of P3HT by increasing the conductive pathways.…”