Fabrication, mechanical, and electromagnetic studies of cobalt ferrite based‐epoxy nanocomposites

Abstract

Controlling the interface, contact of organic‐inorganic materials is necessary for the preparation of high‐performance hybrid nanocomposites. Herein, the cobalt ferrite (CoFe2O4) nanofiller was synthesized via coprecipitation route by the reaction of Fe2 (SO4)3, CoSO4, and triethylene glycol. The obtained CoFe2O4 nanoparticles were thermally treated at 600°C for 5 hours. As prepared, the CoFe2O4 nanoparticles were surface functionalized with 3‐(triethoxysilyl) propylamine (APTES). The modified CoFe2O4 nanoparticles were used as reinforcement during the fabrication of epoxy‐based CoFe2O4 nanocomposite. The synthesized nanofillers and nanocomposites were structurally examined by Fourier transform infrared, X‐ray diffraction analysis, scanning electron microscopy, and thermogravimetric analysis. The effect of nanofiller on surface resistivity, electrical conductivity, and mechanical performance was also investigated. The surface resistivity of EP‐CoFe2O4 nanocomposite decreases with increasing loading concentration of CoFe2O4, while thermal degradation temperatures are improved by 90 K (12.7%) compared to neat EP‐polymer. The mechanical properties, that is, stress‐strain and Young's modulus show an increase of about 60% and 35%, respectively, at 5 wt% CoFe2O4 content. The incredible improvement in the electrical conductivity, mechanical, and thermal stability of EP‐CoFe2O4 up to 5%wt. CoFe2O4 contents are attained due to smaller size and well dispersion of nanofillers in the polymeric matrix. These simultaneous enhancements in properties intend that the EP‐CoFe2O4 nanocomposites can be useful as protective coatings and corrosion‐resistant for a variety of applications

Preparation of flexible and magnetic PA6/SEBS‐MA nanocomposites reinforced with Ni‐Zn ferrite

“…The samples presented narrow hysteresis curves with low values of remanent magnetization (Mr) and coercive field (Hc), suggesting a soft magnetic behavior. 80,81 Regarding saturation magnetization, the Ni-Zn ferrite presented a value of 5.40 emu/g, while the calcined Ni-Zn exhibited a Ms of 60.13 emu/g. The applied heat treatment promoted a considerable increase in saturation magnetization, about 11 times, compared to the Ni-Zn sample.…”

State of the art review on mechanical properties of sandwich composite structures

“…Intercalation method, in situ F I G U R E 1 Sandwich structure and its components polymerization, sol gel method, direct mixing of polymer and nanofillers. [24][25][26][27] Some researchers have used nanofillers namely, nano-clay, carbon nanotube (CNT) and nano-silica for improvement of mechanical properties of composites. Summary of major research work done toward development of composites with the use of nanofillers are listed in Table 1.…”

Enhancing mechanical, thermal property and flame retardancy of optical polythiourethane with self‐assembly phosphazene nanoparticles

“…Especially, in view of the high requirements of materials, optical coatings with high performance such as high refractive index, high mechanical property and good flame retardancy have recently attracted increasing research attention. [13][14][15][16][17][18][19][20][21][22] With excellent optical property, wear resistance of polythiourethane(PTU) becomes a good choice. PTU possesses thiourethane bond with low bond dissociation energy giving ideal self-healing ability [23,24] and high content flexible thioether bonds impart materials high refractive index and excellent flexibility.…”