Corrosion-resistant polypyrrole-banana carbon (PPy-BC) nanocomposites for protection against electromagnetic interference: a green approach

Abstract

The article focuses on the suitability of electrically characterized polypyrrole-banana carbon (PPy-BC) nanocomposites for broadband electromagnetic interference (EMI) shielding application. The environmental-friendly polypyrrole (PPy)-banana carbon (BC) nanocomposites were synthesized via in situ chemical polymerization technique and were characterized using powder X-ray diffraction, FT-IR spectroscopy, scanning electron microscopy (SEM), and UV-Vis spectroscopy techniques. Frequency-dependent dielectric, impedance, loss tangent, and conductivity measurements were analyzed in detail in the frequency range of 20 Hz to 1 MHz. The EMI shielding efficiency (SE) of PPy-BC nanocomposites were performed in the broad frequency range of 12 GHz to 18 GHz (Ku band), relevant for practical applications. The EMI SE achieved for PPy-BC nanocomposites was in the range of * 12 to * 18 dB. The present investigation also explores the anticorrosion property of polypyrrole nanocomposites coatings on mild steel surface in 5 M hydrochloric acid solution through atomic absorption spectroscopy (AAS), potentiodynamic polarization, Nyquist plots, and SEM techniques. AAS studies revealed that corrosion inhibition efficiency increases with an increase in the concentration of polypyrrole nanocomposites. Electrochemical impedance measurements showed that charge transfer resistance values depend on the composites concentration. Obtained SEM results also support the AAS and electrochemical results. The observed electrical property and EMI shielding properties with anticorrosive behavior suggest that PPy-BC nanocomposites can be optimized for useful technological applications.

Design of interconnected 1D nanomaterials with selective localization in biodegradable binary thermoplastic nanocomposite films for effective electromagnetic interference shielding effectiveness

“…The reason behind this behavior of the complex permeability is the increment in the absorption component of total EMI shielding effectiveness () with filler loading as loss permeability is directly proportional to the absorption of EM wave as heat energy (mainly) 39 . Both the real and imaginary part of permeability decrease as the frequency is increased as the involvement of the number of mobile charge carriers decreases at the higher frequency range 41 . The loss tangent () also behaves like a loss component of permeability.…”

“…39 Both the real and imaginary part of permeability decrease as the frequency is increased as the involvement of the number of mobile charge carriers decreases at the higher frequency range. 41 The loss tangent ( tan δ μ À Á ) also behaves Aluminum foil is an electrically conductive material that can easily restrict EM waves. 18 Covering the transmitter antenna with the foil and keeping a hole within it will still able the transmitter to send a signal to the receiver through the hole (Figure 12A,B).…”

Synthesis of ionic liquid modified 1‐D nanomaterial and its strategical distribution into the biodegradable binary polymer matrix to get reduced electrical percolation threshold and electromagnetic interference shielding effectiveness

“…The contention behind this huge jump in is the increment in with MIL loading as the loss component of complex permeability changing following the loss of absorbed EM wave as heat energy 40 . Both the and decreased as the frequency is upgraded and the mobile charge carriers cease to participate with frequency 42 …”

“…40 Both the μ 0 and μ 00 decreased as the frequency is upgraded and the mobile charge carriers cease to participate with frequency. 42…”

Anticorrosion and Supercapacitor Applications of Polypyrrole Coated Graphite Nanocomposites

“…Polypyrrole (PPy), poly(aniline), poly(paraphenylene), polyacetylene, poly(thiophene) and poly (3-4-ethylenedioxythiophene) are examples of electrically conjugated polymers with numerous electrical applications. 9 The electrical, mechanical, and thermal properties of pristine conductive polymers can be controlled and modified by adding suitable fillers to form composite structures with synergy 10 low power density, poor charging rate, as well as the cracking and fracture of the electrodes are some associated disadvantages of these devices. Efficient energy storage probably entails the use of polymers and their composites.…”