Thermal Stability and Magnetic Properties of Polyvinylidene Fluoride/Magnetite Nanocomposites

Abstract

This work describes the thermal stability and magnetic properties of polyvinylidene fluoride (PVDF)/magnetite nanocomposites fabricated using the solution mixing technique. The image of transmission electron microscopy for PVDF/magnetite nanocomposites reveals that the 13 nm magnetite nanoparticles are well distributed in PVDF matrix. The electroactive β-phase and piezoelectric responses of PVDF/magnetite nanocomposites are increased as the loading of magnetite nanoparticles increases. The piezoelectric responses of PVDF/magnetite films are extensively increased about five times in magnitude with applied strength of electrical field at 35 MV/m. The magnetic properties of PVDF/magnetite nanocomposites exhibit supermagnetism with saturation magnetization in the range of 1.6 × 10−3–3.1 × 10−3 emu/g, which increases as the amount of magnetite nanoparticles increases. The incorporation of 2 wt % magnetite nanoparticles into the PVDF matrix improves the thermal stability about 25 °C as compared to that of PVDF. The effect of magnetite particles on the isothermal degradation behavior of PVDF is also investigated.

Magnetic Fe3O4@poly(propylene fumarate-co-ethylene glycol) core–shell biomaterials

“…56 The mechanical enhancements attained herein are considerably larger than those reported by former studies on polymer/magnetite composites (in the range of 7-200% increase with the addition of 1 to 20 wt% Fe 3 O 4 ). 42,43,49 Note that the tensile properties of the developed composites are in the range of those of cancellous bone (0.02-0.5 GPa), while they are signicantly lower than those of cortical bone (3-30 GPa), 57 which indicates their suitability for so-tissue replacements. On the other hand, the ductility of the copolymer was reduced upon addition of the microparticles (Fig.…”

Efficient Transport of Heavy Metals Across Plasticized CTA/PVDF Membranes Mediated by Organo‐Phosphorous Carrier

“…The remaining weight of about 37 wt% represents the carbon skeleton of this polymer. The degradation of polymer main chain and the carbonization process of PVDF happen at a temperature above 520 °C …”

“…The remaining weight of about 37 wt% represents the carbon skeleton of this polymer. The degradation of polymer main chain and the carbonization process of PVDF happen at a temperature above 520 C. [33,34] After a slight weight loss of 3 wt% at around 134 C, due to the elimination of water molecules absorbed by the hydrophilic groups of CTA, this polymer thermally degrades in one step. Indeed, a significant weight loss of about 84 wt% was observed from 297 C to 433 C with T onset of about 359 C, T max at 378 C and residue of 13 wt%.…”

Magnetite-functionalized graphene/poly(styrene-butadiene-styrene) composites: thermal and mechanical properties

“…Nevertheless, improvements in the thermal stability of the composites can be attributed to a homogeneous dispersion of nanofillers in the composites which restricts the movement of SBS polymer and thus provides a physical barrier effect which inhibits the emission of gaseous degradation products. Besides that, the presence of Fe 3 O 4 in the fillers also plays an important role in moving the degradation temperature to higher temperatures which can be associated with the superior interference of the heat source due to the fillers' inorganic nature along with their uniform distribution within the graphene sheets . As a result, the degradation of the polymer is delayed and thermal stability is improved …”