NaCl leached sustainable porous flexible Fe3O4 decorated RGO-polyaniline/PVDF composite for durable application against electromagnetic pollution

Abstract

Abstract.To avoid the interference of electromagnetic radiation from other devices, an electronic device needs to be fabricated with flexible and light weight electromagnetic interference (EMI) shielding materials with high efficiency. According, highly flexible porous poly(vinylidene fluoride) (PVDF)/PFR (Fe 3 O 4 decorated polyaniline/RGO composite) composite was prepared through solution blending of PVDF with pre-synthesized PFR conductive composite that involves in-situ oxidative polymerization of aniline in the presence of reduced graphene oxide (RGO) using FeCl 3 as oxidant. The porous morphology of the composite was created by leaching out of mixed NaCl from the composite. Polyaniline and RGO were mutually decorated by chemically in-situ synthesized ferrosoferric oxide (Fe 3 O 4 ) using the Fe source of FeCl 3 . A homogeneous dispersion of PFR in insulated PVDF matrix resulted in a highly electrical conductive composite (PVDF-PFR) material through formation of three dimensional continuous conductive networks of polyaniline-RGO in the matrix phase. The composite shows an outstanding EMI shielding effectiveness (EMI SE) property due to the porous structure and the presence of conductive network and ferromagnetic Fe 3 O 4 nanoparticles. The PVDF-PFR composite (0.5 mm thickness) depicts a great permittivity and permeability value and achieve high EMI SE value (≈-28.18 dB) and conductivity value of ≈1.10·10 -1 S·cm -1 at very low loading (5 wt%) of RGO.

Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

“…Studies were conducted on several nanomaterials, such as ferromagnetic element nanoalloys, metal oxides, ferrites and their polymers and ICP-based nanocomposites in EMI shielding applications. 276–405 The choice of magnetic materials-filled ICP nanocomposites in EMI shielding applications is mainly guided by the dielectric loss, magnetic loss and impedance matching of the component(s) of the material(s) under investigation. It provides a combination of magnetic nanoparticles and ICPs that account for its additionally reduced weight, cost, enhanced flexibility and corrosion resistance, tuneability conductivity and tailorable permeability.…”

“…The encapsulation of γ-Fe 2 O 3 -decorated RGO in PANI core–shell tubes was also studied for microwave absorption purposes. 329 In addition, Ni/PANI/RGO (3.5 mm, 8–12 GHz), 330 Fe 3 O 4 /PANI/epoxy, 331 RGO/PPy nanotube/Fe 3 O 4 , 332 polyaniline/Fe 3 O 4 (10 wt%)–RGO (10 wt%), 333 Fe 3 O 4 –RGO nanomaterials with PEDOT, 334 and Fe 2 O 3 -decorated RGO–polyaniline (1 wt%)/PVDF 335 ternary composites also revealed enhanced microwave absorption properties. According to Lee et al , 336 the EMI SE performance of a flexible 3D graphene–CNT–Fe 2 O 3 hetero-nanostructure film could result in more reflection, absorption and scattering on the surfaces of the multilayered and interconnected 3D heterostructure in the range of 8.0 to 12.0 GHz.…”

Ionic Liquid-Gr Attached PVDF Composite Film for Shielding of Microwave Radiations

“…A + R + T = 1 (3) These coefficients can be calculated by measuring S parameters as: R = |S 11 | 2 , T = |S 21 | 2 . Shielding efficiency of materials by reflection and absorption can be expressed by the following equations [17]:…”

Regulation binary electromagnetic filler networks in segregated poly(vinylidenefluoride) composite for absorption‐dominated electromagnetic interference shielding

“…Permanent magnetic materials [31][32][33] and nanocrystalline soft magnetic materials 34 endow the composite with a variety of functions (such as antibacterial, 35 hydrogen storage, 36 modified photocatalytic, 37,38 and enhance the absorption performance thus improving electromagnetic shielding). 39 The addition of magnetic ferroferric oxide (Fe 3 O 4 ) into the composite is an effective method by which it is possible to obtain a superior efficiency absorption-dominated EMI.…”