Fabrication of lightweight and biodegradable EMI shield films with selective distribution of 1D carbonaceous nanofiller into the co-continuous binary polymer matrix

Nath, Krishnendu; Ghosh, Suman Kumar; Das, Palash; Katheria, Ankur; Das, Poushali

doi:10.1007/s10854-023-10212-4

Cited by 9 publications

(1 citation statement)

References 55 publications

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“…The CNT-based soft composites have already been well-known for multiple benefits (lightweight, high electrical conductivity with flexible character, superior elasticity) and are widely employed in microelectronics, wearable and stretchable supercapacitors, electromagnetic shielding, and so on. − To further ameliorate these properties, improved dispersion and alignment in the matrix are considered to be of utmost importance. Both in situ and ex situ methods have been proposed for alignment.…”

Section: Introductionmentioning

confidence: 99%

Tuning Electromagnetic Interference Shielding Performance through Controlled Alignment of Ni Nanowires in Soft PDMS Composites

Biswas

Arief

Bhattacharjee

2023

ACS Appl. Nano Mater.

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Efficient dispersion of nanostructured fillers in thermoplastic polymers and elastomers remains an open challenge, and unless it is addressed, the potential utilization of conducting and magnetic fillers influencing the electronic properties of soft nanocomposites could not be properly assessed. Herein, we present a unique approach to address this challenge by constructing a microstructural fence using aligned magnetic networks of Ni nanowires in the direction of the applied external magnetic field, followed by flow-induced secondary in-planar alignment of multiwalled carbon nanotubes during the curing of the soft poly(dimethylsiloxane) (PDMS) elastomer. This mutually perpendicular arrangement offers unique magnetoconducting features to the soft elastomer matrix with moderately high conductivity, which is the key to superior electromagnetic shielding performance. The unique conformation of mutually perpendicular positions of both nanofillers in the bulk PDMS composites results in enhanced electromagnetic interference shielding performance (−28 dB) primarily through an absorption (80%) mechanism, driven primarily by the maximized interaction with incident electromagnetic waves inside the soft elastomer. Fundamental insights into the governing viscoelastic responses of these elastomer composites were gained through oscillatory rheological studies that investigate interparticle attraction within a quasi-solid network.

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Section: Introductionmentioning

confidence: 99%

Tuning Electromagnetic Interference Shielding Performance through Controlled Alignment of Ni Nanowires in Soft PDMS Composites

Biswas

Arief

Bhattacharjee

2023

ACS Appl. Nano Mater.

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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

Nath,

Ghosh,

Das

et al. 2023

J of Applied Polymer Sci

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Ionic liquid is increasingly being used as a chemical modulator of multi‐walled carbon nanotubes (MWCNT). Here, we report the practical method for producing biodegradable electromagnetic interference (EMI) shield films made of thermoplastic polyurethane (TPU), polybutylene adipate‐co‐terephthalate (PBAT), and 1‐(2‐aminoethyl)‐3‐methyl‐1H‐imidazol‐3‐ium modified MWCNT (MIL). The field emission scanning electron microscopy study of cryo‐fractured 50:50 PBAT/TPU blend giving co‐continuous morphology and subsequent polymer EMI shield nanocomposite material had shown the co‐continuous nanofiller distribution. The nanoparticles were chosen to be distributed in the PBAT portion, according to subsequent research employing HRTEM and DMA. The electrical percolation threshold (EPT) is determined to be situated within 1–3 wt% of nanoparticles loading as the remarkable shift in total EMI shielding efficiency from −14.6 dB (for 1 wt%) to −28.6 dB (for 3 wt%) of nanoparticle‐loaded film at 10 GHz (in X‐band region) for a 0.8 mm thick film reveals that the EPT is approximately at 2 wt% of nanoparticle loading. The effective EMI shielding of −37.3 dB was achieved by 10 wt% of MIL loading.

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Fabrication of 2D nanomaterial reinforced co-continuous binary blend composites for thermal management and EMI shielding applications

Katheria,

Das,

Ghosh

et al. 2023

J Polym Res

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Fabrication of lightweight and biodegradable EMI shield films with selective distribution of 1D carbonaceous nanofiller into the co-continuous binary polymer matrix

Cited by 9 publications

References 55 publications

Tuning Electromagnetic Interference Shielding Performance through Controlled Alignment of Ni Nanowires in Soft PDMS Composites

Tuning Electromagnetic Interference Shielding Performance through Controlled Alignment of Ni Nanowires in Soft PDMS Composites

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

Fabrication of 2D nanomaterial reinforced co-continuous binary blend composites for thermal management and EMI shielding applications

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