A journey of thermoplastic elastomer nanocomposites for electromagnetic shielding applications: from bench to transitional research

Katheria, Ankur; Nayak, Josamati; Das, Poushali

doi:10.1039/d1ma00989c

Cited by 34 publications

(17 citation statements)

References 161 publications

(207 reference statements)

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“…TPEs composed of polyether as the soft block and polyester/polyamide/polyurethane as the hard block have found wide applications in flexible electronic devices. − This study is devoted to understanding the molecular structure design of TPE, using PEBA as an example, in the flexible nanocomposites for enhanced EMI shielding applications. The results indicate that the crystallinity (or the content of the crystalline phase) in the semicrystalline TPEs should be minimized for enhanced electrical conductivity and thus increased EMI shielding performance.…”

Section: Resultsmentioning

confidence: 99%

“…Due to their excellent viscoelasticity, moldability, solubility, and adhesivity, thermoplastic elastomers (TPEs) based on block copolymers have been widely utilized to develop flexible electronic devices for various applications, such as sensors and actuators, energy harvesting, and electromagnetic interference (EMI) shielding. − TPEs are typically composed of hard blocks acting as physical cross-linking sites and soft blocks with very low glass-transition temperatures as entropic springs. Polyethers, such as poly(ethylene oxide) (PEO), poly(propylene oxide) (PPO), and poly(tetramethylene oxide) (PTMO), have been employed as soft blocks in polyester-, polyamide-, and polyurethane-based TPEs.…”

Section: Introductionmentioning

confidence: 99%

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Flexible Poly(ether-block-amide)/Carbon Nanotube Composites for Electromagnetic Interference Shielding

Wang

Zhang

et al. 2022

ACS Appl. Nano Mater.

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Conductive nanofillers usually act as nucleating agents in the semicrystalline polymer matrix, and the crystals formed on the filler surface can impede electrical percolation development. In this work, flexible poly(ether-block-amide)/carbon nanotube (PEBA/CNT) nanocomposites were fabricated for electromagnetic interference (EMI) shielding applications. It was demonstrated that CNTs can nucleate the crystallization of the polyamide (PA) block of PEBA and induce the transformation of the crystals from the γ-form to the α-form. Reducing the content of the PA block in PEBA from 50 to 20 wt % decreased the crystallinity of the nanocomposite and thus resulted in a higher electrical conductivity and an increment in EMI shielding performances. However, when ionically conductive polyethylene oxide was used as the polyether block, the hindrance effect of PA crystallization on electrical percolation was effectively mitigated, allowing for both high conductivity and enhanced amide dipole moment with a high PA content (e.g., 50 wt %), which is favorable for electromagnetic wave absorption. As a result, a high EMI shielding effectiveness with increased absorption can be achieved in PEBA/CNT nanocomposites.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible Poly(ether-block-amide)/Carbon Nanotube Composites for Electromagnetic Interference Shielding

Wang

Zhang

et al. 2022

ACS Appl. Nano Mater.

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“…The polymer composites with electrically conductive fillers have been evaluated as a suitable EMI shielding film replacing typical metal-based materials based on the Faraday cage. − Accordingly, in order to change from reflection shielding to absorption-dominant shielding, composite material studies using various fillers such as MXene, MOF-based materials, , and magnetic materials have been reported. Carbon-based fillers, such as graphite, carbon nanotubes, graphene, and carbon black, have also been widely used for EMI shielding applications because of their low cost and excellent intrinsic conducting properties. − Reduced graphene oxide (rGO) is widely used to help improve the processability of graphene.…”

Section: Introductionmentioning

confidence: 99%

Millimeter-Scale Percolated Polyethylene/Graphene Composites for 5G Electromagnetic Shielding

Ryu

Kim

Park

et al. 2022

ACS Appl. Nano Mater.

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A concern regarding electromagnetic interference (EMI) shielding materials with high absorption capacity was raised as fifth-generation (5G) telecommunication developed. However, current shielding materials are generally focusing on reflection. To address this breakthrough in EMI shielding materials, a highdensity polyethylene (HDPE)/few-layer graphene composite millimeter (mm)-scaled percolation structure was investigated for K-band electromagnetic shielding applications. The HDPE/multilayer graphene (MLG) composite with an mm-scale percolation structure exhibits excellent electrical and thermal conductive properties and shows an absorption-dominant electromagnetic shielding effect. In particular, the best optimized EMI shielding effectiveness of the composite at 26 GHz was 71.25 dB and showed an excellent absorption-dominant shielding mechanism with an absorption coefficient of 0.78. The mm-scaled percolation structure revealed that it effectively works in the K-band rather than the X-band by optimizing multiple reflection phases by the mm-scale HDPE particle.

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“…In recent years, electrically conductive polymer composites have been attracting great attention for EMI shielding due to their advantages of lightweight, flexibility, tunable conductivity, and good processability. − Highly electroconductive nanofillers used for preparing such polymeric composites include carbon nanotubes (CNTs), , graphene, and MXene . Among them, MXene is a relatively new two-dimensional (2D) material with the formula M n +1 X n T x , where M is an early transition metal and X is carbon or nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional MXene/Aramid Nanofiber Composite Films for Efficient Electromagnetic Interference Shielding and Repeatable Early Fire Detection

Peng

Wang

et al. 2022

ACS Omega

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Rapid development of highly integrated electronic and telecommunication devices has led to urgent demands for electromagnetic interference (EMI) shielding materials that incorporate flame retardancy, and more desirably the early fire detection ability, due to the potential fire hazards caused by heat propagation and thermal failure of the devices during operation. Here, multifunctional flexible films having the main dual functions of high EMI shielding performance and repeatable fire detection ability are fabricated by vacuum filtration of the mixture of MXene and aramid nanofiber (ANF) suspensions. ANFs serve to reinforce MXene films via the formation of hydrogen bonding between the carbonyl groups of ANFs and the hydroxyl groups of MXene. When the ANF content is 20 wt %, the tensile strength of the film is increased from 24.6 MPa for a pure MXene film to 79.5 MPa, and such a composite film (9 μm thickness) exhibits a high EMI shielding effectiveness (SE) value of ∼40 dB and a specific SE (SSE) value of 4361.1 dB/mm. Upon fire exposure, the composite films can trigger the fire detection system within 10 s owing to the thermoelectric property of MXene. The self-extinguishing feature of ANFs ensures the structural integrity of the films during burning, thus allowing for continuous alarm signals. Moreover, the films also exhibit excellent Joule heating and photothermal conversion performances with rapid response and sufficient heating reliability.

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A journey of thermoplastic elastomer nanocomposites for electromagnetic shielding applications: from bench to transitional research

Abstract: The rapid growth and day to day skyrocketing use of electronic equipment and gadgets used across a vast spectrum of industrial, military, consumer, and commercial sectors have led to a...

Cited by 34 publications

References 161 publications

Flexible Poly(ether-block-amide)/Carbon Nanotube Composites for Electromagnetic Interference Shielding

Flexible Poly(ether-block-amide)/Carbon Nanotube Composites for Electromagnetic Interference Shielding

Millimeter-Scale Percolated Polyethylene/Graphene Composites for 5G Electromagnetic Shielding

Multifunctional MXene/Aramid Nanofiber Composite Films for Efficient Electromagnetic Interference Shielding and Repeatable Early Fire Detection

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