Abstract
Two materials were used, like graphene oxide nanosheets (GOn) and ferromagnetic nanoparticles (Fe3O4), to attenuate the electromagnetic (EM) properties in blend hybrid nanocomposites based on styrene-butadiene rubber (SBR) and polyvinylidene difluoride (PVDF) as the matrix. The rationale behind using either a ferroelectric or a ferromagnetic nanofillers as Fe3O4 in combination with intrinsically conducting nanofillers (graphene oxide) at different weight ratios (3.75:1.25; 2.5:2.5 and 1.25:3.75), is to induce both electrical and magnetic dipoles in the hybrid nanocomposite system and characterization to determine the effect of nanofillers hybridization in improving the structural, mechanical, dielectric/electrical, magnetic and thermal properties of a polymer blend (PVDF-SBR) for electromagnetic interference (EMI) shielding application. Due to the synergy between both nanofillers, it was found that Young’s modulus of the nanocomposite containing 5 wt% of the hybrid nanofiller was significantly improved (87%), while the strain at yield remained constant due to the low particle content and the rubbery effect of the SBR copolymer. In addition, the degradation temperature of the matrix was shifted from 464 to 472 °C with the addition of 2.5:2.5 of GOn:Fe3O4. Finally, the hybrid reinforcement also had a positive effect on the electrical and magnetic properties of the nanocomposites with an improvement that exceeds 30%. By careful selection of synthetic techniques and understanding/exploiting the unique physics of the polymeric nanocomposites in such materials, novel functional polymer-inorganic nanocomposites can be designed and fabricated for new interests in magneto applications such as superparamagnetism, electromagnetic wave absorption, and electromagnetic interference shielding. This study opens new avenues to design flexible and lightweight electromagnetic interference shielding materials by careful selection of functional nanoparticles.
Highlights
Recent research and development on functional materials revealed that the electromagnetic interference (EMI) shielding of materials has the potential to significantly improve specific applications such as lightning strike protection in airplanes, electronics field, sensors, as well as sensitive electronic devices, telecommunications, and radar systems
Functional nanocomposites based on a blend of styrene butadiene rubber (SBR) and polyvinylidene difluoride (PVDF) as the matrix reinforced by a hybrid nanofiller system of graphene oxide nanosheets (GOn) and ferromagnetic nanoparticles (Fe3O4) at different weight ratios (3.75:1.25; 2.5:2.5 and 1.25:3.75) were successfully prepared and characterized to determine the effect of nanofillers hybridization in improving the structural,mechanical, dielectric/electrical, magnetic and thermal properties of a polymer blend (PVDF-SBR) for electromagnetic interference (EMI) shielding applications
The morphology of hybrid nanocomposites starts to transform in a co-continuous structure with the presence of highly dispersed a small droplet with a size of 18 μm and the appearance of some dispersed nanosheet ( GnO) and nanoparticles ( Fe3O4) of PVDF-SBR with a size around of 7 − 6 μm
Summary
Recent research and development on functional materials revealed that the electromagnetic interference (EMI) shielding of materials has the potential to significantly improve specific applications such as lightning strike protection in airplanes, electronics field, sensors, as well as sensitive electronic devices, telecommunications, and radar systems. Hybrid polymer nanocomposites are being used in an interesting range of applications This class of materials offers several attractive characteristics such as ease of handling, high adaptability, as well as better thermal and mechanical properties combined with their low manufacturing costs. They are generally made from the hybridization of more than one type of reinforcements embedded in a polymer matrix to combine the advantages of all the components while compensating for the weakness of each one used individually [23, 24]. The effect of particle content on the tensile, hardness, thermal, rheological, electrical and magnetic properties of the nanocomposites are investigated
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