Graphene–polyamide‐6 composite for additive manufacture of multifunctional electromagnetic interference shielding components

Lee, Kok Peng Marcian; Baum, Thomas C.; Shanks, Robert A.; Daver, Fügen

doi:10.1002/app.49909

Cited by 13 publications

(9 citation statements)

References 46 publications

(96 reference statements)

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“…γ of between 500 and 8000 s −1 . The results at a low shear rate agree with the melt flow index (MFI) of the materials, where we reported similar MFI in PA6 and GC17.0 [22]. However, the high shear rate behaviour of the materials was not captured by MFI testing.…”

Section: Steady Shear Rheology and Printing Envelopesupporting

confidence: 84%

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Rheology and 3D Printability of Percolated Graphene–Polyamide-6 Composites

et al. 2020

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Graphene–polyamide-6 (PA6) composites with up to 17.0%·w/w graphene content were prepared via melt mixing. Oscillatory rheometry revealed that the dynamic viscoelastic properties of PA6 decreased with the addition of 0.1%·w/w graphene but increased when the graphene content was increased to 6.0%·w/w and higher. Further analysis indicated that the rheological percolation threshold was between 6.0 and 10.0%·w/w graphene. The Carreau–Yasuda model was used to describe the complex viscosity of the materials. Capillary rheometry was applied to assess the steady shear rheology of neat PA6 and the 17.0%·w/w graphene–PA6 composite. High material viscosity at low shear rates coupled with intense shear-thinning in the composite highlighted the importance of selecting the appropriate rheological characterisation methods, shear rates and rheological models when assessing the 3D printability of percolated graphene–polymer composites for material extrusion (ME). A method to predict the printability of an ME filament feedstock, based on fundamental equations describing material flow through the printer nozzle, in the form of a printing envelope, was developed and verified experimentally. It was found that designing filaments with steady shear viscosities of approximately 15% of the maximum printable viscosity for the desired printing conditions will be advantageous for easy ME processing.

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Section: Steady Shear Rheology and Printing Envelopesupporting

confidence: 84%

“…The preparation of GC17.0 into a filament for ME was described in our earlier work [22]. ME 3D printing was performed with a MakerBot Replicator 2X (Brooklyn, NY, USA) experimental 3D printer set up with a 0.4 mm diameter nozzle.…”

Section: Preparation Of Test Specimensmentioning

confidence: 99%

Rheology and 3D Printability of Percolated Graphene–Polyamide-6 Composites

et al. 2020

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“…Mitigating all the shortcomings possessed by metals, conductive fillers, when reinforced with electrically insulating polymers, can emerge as a flexible and lightweight shielding material that can be processed with ease and operated in a harsh environment. Due to the excellent electrical conductivity, the carbonaceous fillers such as carbon nanotubes (CNTs), [5][6][7] short carbon fibers (SCF), 8,9 carbon nanofibers (CNFs), 10,11 graphene, [12][13][14][15] graphite, [16][17][18][19][20][21][22] conductive carbon black, 8,[23][24][25][26][27] and metal nanoparticles, [28][29][30][31][32] have been extensively used in polymeric composites which exhibited outstanding EMI SE.…”

Section: Introductionmentioning

confidence: 99%

Superior electromagnetic interference shielding effectiveness of functionalized MWCNTs filled flexible thermoplastic polymer nanocomposites

Sit

Nath

Das

et al. 2022

Journal of Elastomers & Plastics

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Carbon nanotubes (CNTs) impart great multi-functionality when reinforced with a polymer matrix. This paper shows the qualitative and quantitative improvements of the mechanical, electrical, and electromagnetic interference shielding effectiveness properties with the additions of the multiwalled carbon nanotubes (MWCNTs) and functionalized MWCNTs (FMWCNTs) in ethylene methyl acrylate (EMA) polymer. Mechanical characterization is performed through tensile testing, and electromagnetic interference shielding effectiveness (EMI SE) is calculated from the scattering parameters obtained from the vector network analyzer. Both properties improve compared to neat polymer with the reinforcement loadings up to a critical value, from where the properties start to degrade due to the agglomeration of the CNTs. FMWCNTs provide better performance in terms of properties over the MWCNT reinforced nanocomposites. Morphological characterization using a scanning electron microscope justifies a lower percolation threshold of FMWCNT/EMA composite by better electrical conductive network formation. At 10 wt% of FMWCNT loading, the FMWCNT/EMA composite shows 25.1 dB of EMI shielding efficiency combined with excellent mechanical and electrical properties extending its potential use in both industry and academia as an excellent flexible EMI shielding material.

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“…The specific functionality of a polymer nanocomposite is usually determined by the nanofiller imbued in the polymer matrix. The range of nanofillers used in polymer nanocomposites is broad and includes, for example, nanocarbons like graphene and carbon nanotubes, − ferrites, iron particles, , or MXenes . In light of shielding stray EM radiation, polymer composites based on nanocarbon materials have one crucial advantage over similar materials.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Thermoplastic Composites as Extremely Broadband and Frequency-Dependent EMI Absorbers for Multifunctional Applications

Żerańska-Chudek

Filak

Wilczyński

et al. 2022

ACS Appl. Electron. Mater.

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Multifunctional materials are the future of modern electronics. The reduction of weight and no interfacial mismatches perfectly fit the requirements of those industry sectors which require miniaturization, low weight, and high functionality, like aerospace or wearable electronics. Here, we show multifunctional thermoplastic polymer composites based on acrylonitrile–butadiene–styrene (ABS) with graphene nanoplatelet (GNP) inclusions at different weight loadings of GNPs, from the pure polymer up to 10 wt %. The multifunctionality is expressed via efficient electromagnetic interference (EMI) shielding in an extensive frequency range, from microwave to terahertz, and good electrical conductivity and heat management. The highest measured total shielding efficiency reached over 80 dB per 1 mm-thick sample in the terahertz range for the 5 wt % GNP concentration. Composites with the highest GNP loading show high thermal conductivity of 1.8 W/mK and an electrical conductivity of 188 S/m. All composites exhibited absorption as the primary shielding mechanism. These are some of the highest EMI shielding efficiency and thermal conductivity values reported in the literature. Our results suggest that the ABS/GNP composites reported here are suitable for multifunctional EMI absorber/heat management applications.

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Graphene–polyamide‐6 composite for additive manufacture of multifunctional electromagnetic interference shielding components

Cited by 13 publications

References 46 publications

Rheology and 3D Printability of Percolated Graphene–Polyamide-6 Composites

Rheology and 3D Printability of Percolated Graphene–Polyamide-6 Composites

Superior electromagnetic interference shielding effectiveness of functionalized MWCNTs filled flexible thermoplastic polymer nanocomposites

Graphene-Based Thermoplastic Composites as Extremely Broadband and Frequency-Dependent EMI Absorbers for Multifunctional Applications

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