Lightweight flexible carbon nanotube/polyaniline films with outstanding EMI shielding properties

Li, Hui; Lu, Xuehong; Yuan, Du; Sun, Jiaotong; Erden, Fuat; Wang, Fuke; He, Chaobin

doi:10.1039/c7tc02394d

Cited by 86 publications

(28 citation statements)

References 44 publications

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“…For example, a material with an EMI-SE value of 20 dB may block about 99% of the incident EM radiation. [45] According to EMI shielding theory, when EM radiation is incident on a shielding material, the incident power can be separated into three components viz. reflected, absorbed, and transmitted power, and the corresponding power coefficients of the absorbance (A), reflection (R), and transmittance (T) are related as follows [46] :…”

Section: Electromagnetic Interference Shielding Effectivenessmentioning

confidence: 99%

Nanostructured cigarette wrapper encapsulated PDMS‐RGO sandwiched composite for high performance EMI shielding applications

Bera

Paria

et al. 2020

Polymer Engineering & Sci

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Here, we report a unique hybrid sandwich‐type composite structure consisting of waste cigarette wrapper (CW) inserted in polydimethylsiloxane (PDMS) and reduced graphene oxide (RGO) composite matrix that displays a high EMI shielding effectiveness (SE) of ~50.79 dB in the extended Ku‐band. The function of the inserted CW is to facilitate the multiple reflections and heat dissipation as it contains an Al coating. The interior of CW in the composite as well as the three‐dimensional conductive networks of RGO throughout the PDMS matrix facilitates the microwave absorption through conductive dissipation and heat dissipation. Thus, an absorption‐multiple reflection‐absorption pathway is followed due to the combination of three sandwiched layers, that is, PDMS‐RGO, CW, and PDMS‐RGO. The sandwich architecture of the hybrid PDMS nanocomposite containing both CW and RGO displays a superior EMI SE over the nanocomposite that only contains RGO as filler in PDMS matrix. Moreover, the fabricated composite displays a high thermal conductivity which helps to dissipate the radiated microwave energy via a Joule heating effect. Thus, the fabricated lightweight and flexible hybrid composite structure could be an efficient microwave absorber which offers an attractive and cost‐effective alternative approach to metal based conventional EMI shielding materials.

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Section: Electromagnetic Interference Shielding Effectivenessmentioning

confidence: 99%

Nanostructured cigarette wrapper encapsulated PDMS‐RGO sandwiched composite for high performance EMI shielding applications

Bera

Paria

et al. 2020

Polymer Engineering & Sci

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“…Conductive polymer polyaniline (PANI) is used as an additional component with dielectric losses in a wide variety of EMC composites. A high EMR shielding efficiency, in a wide frequency range, has been experimentally proven for composites of PANI using silver nanowires [3], particles of antimony oxide [4], graphene [5][6][7], carbon nanotubes [8,9], Ti 3 SiC 2 [10], MoS 2 [11], CuO [12], bamboo fibers [13], bagasse [14], MXene, and other fillers [15]. The EMR shielding properties of composites of PANI with magnetic nanoparticles of cobalt and iron-nickel alloy [16] and ferrites [17] have also been shown.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Polyaniline-Based Composites for Electromagnetic Compatibility of Electronic Devices

et al. 2020

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Polyaniline-based composites designed to ensure the electromagnetic compatibility of electronic devices were obtained. The surface morphologies of the obtained films were studied using optical and electron microscopy. The electrical resistivity of polyaniline (PANI) films were measured at various thicknesses. For films of various compositions and various thicknesses, the frequency dependencies of the complex dielectric permittivity, in the range of 100–2000 kHz, as well as the electromagnetic radiation (EMR) absorption coefficient in the frequency range 0.05–2 GHz were obtained. It was found that flexible gelatin-PANI composite films with a thickness of 200–400 μm, a bending radius of about 5 cm, and a real part of complex permittivity of not more than 10 provide an EMR absorption coefficient of up to 5 dB without introducing additional EMR absorbing or reflecting fillers. The resulting gelatin-PANI composite films do not possess a through electrical conductivity and can be applied directly to the surface of protected printed circuit boards.

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“…9,10 More importantly, lms of CNTs are mechanically strong, lightweight and exible. 11,12 They can be used as high-surface-area current collectors and electrodes of exible supercapacitors for powering wearable electronics. 13,14 The structures and surface properties [15][16][17][18] of individual CNTs and the assembling structures [19][20][21][22][23][24][25][26] of CNT lms are closely related with the performance of supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical carbon nanotube hybrid films for high-performance all-solid-state supercapacitors

et al. 2017

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Lightweight flexible carbon nanotube/polyaniline films with outstanding EMI shielding properties

Abstract: Flexible and highly conductive CNT/PANI films were developed for EMI shielding applications, which exhibited the highest specific shielding effectiveness among those reported.

Cited by 86 publications

References 44 publications

Nanostructured cigarette wrapper encapsulated PDMS‐RGO sandwiched composite for high performance EMI shielding applications

Nanostructured cigarette wrapper encapsulated PDMS‐RGO sandwiched composite for high performance EMI shielding applications

Synthesis and Characterization of Polyaniline-Based Composites for Electromagnetic Compatibility of Electronic Devices

Hierarchical carbon nanotube hybrid films for high-performance all-solid-state supercapacitors

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