Preparation and enhanced properties of Fe3O4 nanoparticles reinforced polyimide nanocomposites

Abstract

Polyimide (PI) nanocomposite reinforced with Fe 3 O 4 nanoparticles (NPs) at various NPs loadings levels of 5.0, 10.0, 15.0, and 20.0 wt% were prepared. The chemical interactions of the Fe 3 O 4 NPs/PI nanocomposites were characterized using Fourier Transform Infrared (FT-IR) spectroscopy. X-ray Diffraction (XRD) results revealed that the addition of NPs had a significant effect on the crystallization of PI. Scanning electron microscope (SEM) and the atomic force microscope (AFM) were used to characterize the dispersion and surface morphology of the Fe 3 O 4 NPs and the PI nanocomposites. The obtained optical band gap of the nanocomposites characterized using Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV-Vis DRS) was decreased with increasing the Fe 3 O 4 loading. Differential scanning calorimetry (DSC) results showed a continuous increase of T g with increasing the Fe 3 O 4 NPs loading. Some differences were observed in the onset decomposition temperature between the pure PI and nanocomposites since the NPs and the PI matrix were physically entangled together to form the nanocomposites. The contact angle of pure PI was larger than that of Fe 3 O 4 /PI nanocomposites films, and increased with increasing the loading of Fe 3 O 4. The degree of swelling was increased with increasing the Fe 3 O 4 loading and the swelling time. The dielectric properties of the nanocomposite were strongly related to the Fe 3 O 4 loading levels. The Fe 3 O 4 /PI magnetic property also had been improved with increasing the loading of the magnetic nanoparticles.

Engineering On‐Demand Magnetic Core–Shell Composite Wound Dressing Matrices via Electrohydrodynamic Micro‐Scale Printing

“…In addition to this, incorporating Fe 3 O 4 NPs into the core–shell matrices made the structures more hydrophilic, as the initial contact angle for nonmagnetic matrices loaded with 1.1% TH was 105° ± 3.1° that was higher than magnetic matrices loaded with TH with same concentration (Figure b and i). These results mimic those seen in previous studies . It means that inner PEO material had no effect on the hydrophobicity of the matrices and indicates PEO was entirely encapsulated within the PCL fibers.…”

Novel Polyimide/Copper-Nickel Ferrite Composites with Tunable Magnetic and Dielectric Properties

“…The incorporation of flexible linkages into their main chains, such as aromatic ether groups, can substantially improve the processability of these polymers. The introduction of magnetic inorganic particles into a polyimide matrix can produce materials with improved properties exhibiting high thermal stability, excellent mechanical behavior, magnetic properties, and flexibility [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. Flexible magnetic polyimide films are important for the fabrication of flexible electronics, devices which have been developed rapidly in the last years.…”

Preparation and properties of polyimide-based nanocomposites containing functionalized Fe3O4 nanoparticles

“…MNPs are suspended in the liquid phase, then the monomers are polymerized to form the magnetic polymer nanocomposites. 29 –31…”