Electromagnetic shielding performance of polyaniline-nanorod/graphene-nanoflake hybrid films in the S- and X-bands

Abstract

Polyaniline (PANI) is an excellent lightweight electromagnetic shielding material with interesting features like flexibility and tuneable electrical conductivity. Moreover, it is corrosion-free, inexpensive and can be easily synthesized. Shielding by...

Novel synthesis of polyaniline/tellurium (PANI/Te) nanocomposite and its EMI shielding behavior

“…A reflection loss of À54 dB at 33.72 GHz and À42 dB at 29.27 GHz in the PANI/Fe 3 O 4 composite film of 0.5 mm thickness was reported by Tang et al, 34 while Li et al 35 successfully developed lightweight and flexible films by incorporating amine-functionalized carbon nanotubes (CNTs) into polyaniline (PANI) for excellent shielding behavior. Similarly, shielding effectiveness of about 57 dB for a hybrid film of B10 mm thickness of PANI-nanorod/graphene-nanoflake was reported by Mohan et al 36 The present article highlights an in situ polymerization of aniline to prepare its composite with Te using sodium tellurite in the presence of 2-mercaptoethanol, a mild reducing agent. The EMI shielding property of PANI/Te nanocomposite so generated was investigated and demonstrated herein, revealing that using silver nanoparticles (Ag NPs) as an additional conductive nanofiller, the EMI efficiency can be improved.…”

“…Similarly, shielding effectiveness of about 57 dB for a hybrid film of ∼10 μm thickness of PANI-nanorod/graphene-nanoflake was reported by Mohan et al . 36…”

A green mediated synthesis of glass fiber‐nickel ferrite‐ polyaniline ternary composite: An excellent thermal stability and outstanding electromagnetic interference shielding performance

“…A material must attenuate electromagnetic (EM) waves to their utmost extent (via reflection or absorption) with minimal transmission to be considered an effective EMI shield. The established criterion for ordinary shielding material is an EMI SE of 20 dB 44,45 The value of total shielding effectiveness (SE Total ) is an estimation of the loss of electromagnetic (EM) energy in transmission through the material in comparison with the direct transmission of energy without the presence of a shield, and it is often expressed in decibels (dB). where SE R , SE A , and SE M stand for the efficacy of the shielding caused by reflection, absorption, and multiple reflections, respectively, and P i and P t are the powers of the incident and transmitted electromagnetic waves, correspondingly.…”

“…A material must attenuate electromagnetic (EM) waves to their utmost extent (via reflection or absorption) with minimal transmission to be considered an effective EMI shield. The established criterion for ordinary shielding material is an EMI SE of 20 dB 44,45 The value of total shielding effectiveness (SE Total ) is an estimation of the loss of electromagnetic (EM) energy in transmission through the material in comparison with the direct transmission of energy without the presence of a shield, and it is often expressed in decibels (dB). SE Total dB ð Þ¼À10 log…”