Study of the Influence of Magnetite Nanoparticles Supported on Thermally Reduced Graphene Oxide as Filler on the Mechanical and Magnetic Properties of Polypropylene and Polylactic Acid Nanocomposites

Abstract

A study addressed to develop new recyclable and/or biodegradable magnetic polymeric materials is reported. The selected matrices were polypropylene (PP) and poly (lactic acid) (PLA). As known, PP corresponds to a non-polar homo-chain polymer and a commodity, while PLA is a biodegradable polar hetero-chain polymer. To obtain the magnetic nanocomposites, magnetite supported on thermally reduced graphene oxide (TrGO:Fe3O4 nanomaterial) to these polymer matrices was added. The TrGO:Fe3O4 nanomaterials were obtained by a co-precipitation method using two types of TrGO obtained by the reduction at 600 °C and 1000 °C of graphite oxide. Two ratios of 2.5:1 and 9.6:1 of the magnetite precursor (FeCl3) and TrGO were used to produce these nanomaterials. Consequently, four types of nanomaterials were obtained and characterized. Nanocomposites were obtained using these nanomaterials as filler by melt mixer method in polypropylene (PP) or polylactic acid (PLA) matrix, the filler contents were 3, 5, and 7 wt.%. Results showed that TrGO600-based nanomaterials presented higher coercivity (Hc = 8.5 Oe) at 9.6:1 ratio than TrGO1000-based nanomaterials (Hc = 4.2 Oe). PLA and PP nanocomposites containing 7 wt.% of filler presented coercivity of 3.7 and 5.3 Oe, respectively. Theoretical models were used to analyze some relevant experimental results of the nanocomposites such as mechanical and magnetic properties.

A Brief Review on the High-Energy Electromagnetic Radiation-Shielding Materials Based on Polymer Nanocomposites

“…In polymers technology, the use of a hybrid filler system enables the combination of two materials of different nature to impart specific properties to the resulting composites [109,[129][130][131][132][133][134]. In this regard, the use of a hybrid filler system based on carbon-based nanomaterials and high-Z-based nanomaterials is seen as a viable and novel approach for obtaining polymeric nanocomposites for advanced applications.…”

A mechanical biosensor based on membrane-mediated magneto-stress-electric coupled sensitization for human serum albumin detection

“…12 Magneto-stress coupling technology was gradually applied in this type of MMBs owing to its high signal-to-noise ratio, low cost and immediate response in a magnetic field. [15][16][17][18] In the magneto-stress coupling system, magnetic nanomaterials (MNPs), as high-throughput transport particles, 19 were magnetized immediately and affected by the magnetic force under a magnetic field. The displacement direction of the MNPs was consistent with the magnetic field direction, showing a superior performance in the biosensing.…”

Magnetically Stimulable Graphene Oxide/Polypropylene Nanocomposites

“…In this respect, in the last few decades, nanofiller-reinforced polymer composites have attracted significant interest in a large number of applications, including energy storage, biomedical, automotive, aerospace, computing, construction, astronomy, and other fields. , The incorporation of carbon nanostructures to synthesize polymeric nanocomposites with improved mechanical properties and/or electrical conductivity is a promising alternative. The electrically insulated and soft polymeric matrix imparts mechanical resistance, and the carbon nanomaterials provide electrical conductivity . The discovery of monolayer graphene, presenting a hexagonal lattice arrangement composed of sp 2 -hybridized carbon atoms, has opened a wide range of research possibilities.…”

“…The electrically insulated and soft polymeric matrix imparts mechanical resistance, and the carbon nanomaterials provide electrical conductivity. 4 The discovery of monolayer graphene, presenting a hexagonal lattice arrangement composed of sp 2 -hybridized carbon atoms, has opened a wide range of research possibilities. The excellent thermal, mechanical, electrical, and various other properties make graphene a suitable material for sensors, electronics, catalysis, drug delivery, and energy devices.…”