Stretching induced alignment of graphene nanoplatelets in polyurethane films for superior in-plane thermal conductivity and electromagnetic interference shielding

Mani, Dineshkumar; Vu, Minh Canh; Lim, Choong‐Sun; Kim, Jun‐Beom; Jeong, Tae‐Hyeong; Kim, Hye Jin; Islam, Muhammad Azizul; Lim, Jung‐Hyurk; Kim, Kyung Min; Kim, Sung‐Ryong

doi:10.1016/j.carbon.2022.09.047

Cited by 50 publications

(13 citation statements)

References 45 publications

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“…Moreover, the difficulty for orientation distribution of GNS in various matrices further degrades its TC performance and also causes flexibility loss . Although several preparation methods such as electrostatic repulsion-induced and stretching-induced methods have been reported to enable chemically inert GNS in-plane orientation, most of them involved into the use of chemical surfactants and a complex operation process. ,, Besides, how to balance the use functionality (electromagnetic performance and TC) and structure configuration (flexibility and thickness) of GNS-based composites is also a crucial challenge.…”

Section: Introductionmentioning

confidence: 99%

“…19−21 For instance, Vu et al 21 EMI shielding effectiveness values (SE reaches 35 dB) at a thickness of 21 μm by evaporative self-assembly. Mani et al 22 reported GNS/polyurethane films with excellent TC of 10.68 W m −1 K −1 and remarkable EMI SE of 41 dB by a solution casting approach. However, the chemical inertness and high impedance of GNS severely limit the development of GNSbased composites' EMI shielding and EWA domains.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, owing to the ultrahigh intrinsic thermal conductivity (TC, ∼5300 W m –1 K –1 ), it is also expected to be an ideal filler with ultra-lightweight and high heat conduction properties. − For instance, Vu et al fabricated a flexible polydopamine@GNS/aramid nanofiber (ANF) composite film with a high TC (reach 68.20 W m –1 K –1 ) and super EMI shielding effectiveness values (SE reaches 35 dB) at a thickness of 21 μm by evaporative self-assembly. Mani et al . reported GNS/polyurethane films with excellent TC of 10.68 W m –1 K –1 and remarkable EMI SE of 41 dB by a solution casting approach.…”

Section: Introductionmentioning

confidence: 99%

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Flexible and Ultrathin Graphene/Aramid Nanofiber Carbonizing Films with Nacre-like Structures for Heat-Conducting Electromagnetic Wave Shielding/Absorption

Xiang

Zhai

et al. 2023

ACS Appl. Mater. Interfaces

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Electromagnetic interference (EMI) shielding and electromagnetic wave absorption (EWA) materials with good thermal management and flexibility properties are urgently needed to meet the more complex modern service environment, especially in the field of smart wearable electronics. How to balance the relation of electromagnetic performance, thermal management, flexibility, and thickness in material design is a crucial challenge. Herein, graphene nanosheets/aramid nanofiber (C-GNS/ANF) carbonizing films with nacre-like structures were fabricated via the blade-coating/carbonization procedure. The ingenious configuration from highly ordered alignment GNS interactively connected by a carbonized ANF network can effectively improve the thermal/electrical conductivity of a C-GNS/ANF film. Specifically, the ultrathin C-GNS/ANF film with a thickness of 17 μm shows excellent in-plane thermal conductivity (TC) of 79.26 W m–1 K–1 and superior EMI shielding up to 56.30 dB. Moreover, the obtained C-GNS/ANF film can be used as a lightweight microwave absorber, achieving excellent microwave absorption performance with a minimum reflection loss of −56.07 dB at a thickness of 1.5 mm and a maximum effective absorption bandwidth of 5.28 GHz at an addition of only 5 wt %. Furthermore, the C-GNS/ANF films demonstrate good flexibility, outstanding thermal stability, and flame retardant properties. Overall, this work indicates a prospective direction for the development of the next generation of electromagnetic wave absorption/shielding materials with high-performance heat conduction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flexible and Ultrathin Graphene/Aramid Nanofiber Carbonizing Films with Nacre-like Structures for Heat-Conducting Electromagnetic Wave Shielding/Absorption

Xiang

Zhai

et al. 2023

ACS Appl. Mater. Interfaces

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“…EMI shielding materials impede or decrease the transmittance of the incident electromagnetic waves and prohibit the interference of EM waves of the electronic device with those of the surrounding. 22,23 Supercapacitors with the storage of high amount of electric energy provide efficient energy sources for soft electronics or any other applications that necessitate a long-life energy storage. 24,25 And finally, tissue engineering scaffolds are aimed to regenerate the tissue damages and rehabilitate the tissue structure and function with the provision of biophysical and biochemical cues.…”

Section: Introductionmentioning

confidence: 99%

“…Strain sensors measure the conductivity changes (or resistivity changes) versus the strain changes. EMI shielding materials impede or decrease the transmittance of the incident electromagnetic waves and prohibit the interference of EM waves of the electronic device with those of the surrounding 22,23 . Supercapacitors with the storage of high amount of electric energy provide efficient energy sources for soft electronics or any other applications that necessitate a long‐life energy storage 24,25 .…”

Section: Introductionmentioning

confidence: 99%

A review on electrically conductive polyurethane nanocomposites: From principle to application

Jafarzadeh,

Farzaneh,

Haddadi‐Asl

et al. 2023

Polymer Composites

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Polyurethanes (PUs) thanks to the occurrence of phase separation and biphasic structure prevail over other polymer matrixes for impregnation of conductive fillers and production of conductive composites. A number of carbonous fillers including carbon black, carbon fiber, carbon nanotube, graphite and its derivatives, and fullerene can be loaded into the PU matrixes to impart electrical conductivity. The properties of the carbonous fillers, the filler/PU interactions, and the method of compositing determine the conductive performance of the composite. It is possible to modulate the properties of the conductive PU composites and employ them for a number of electronic applications including but not limited to the strain sensors, electromagnetic interference shielding materials, supercapacitors, and tissue engineering scaffolds. In the present review, first, the distinctive properties of PU as a matrix of conductive composites have been discussed. Then, various carbon fillers loaded into the PU matrixes and their structural and conductive properties have been debated. Thereafter, the fabrication methods of the conductive composites as well as the influential parameters on the electrical properties of the composites have been reviewed to provide an insight into how fulfill a PU composite with the desired electrical performance. And finally, a number of applications of conductive PU composites have been put forward.Highlights Polyurethanes are very capable matrixes for conductive composites. Carbonous fillers can be loaded into the PU matrixes to impart conductivity. Conductive PU composites are employed for a number of electronic applications. Herein, properties, fillers, and applications of PU composites are reviewed.

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Recent Advances and Future Prospects for Construction Strategies of Flexible Electromagnetic Protection Patches

Gong,

Chen,

Cui

et al. 2024

Adv Materials Technologies

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With the rapid development of morphing aircraft, increasing demands are put forward for flexible patches (FP). In addition to sufficient deformation capability and mechanical strength, FP are required for electromagnetic continuity especially at active gaps of morphing aircraft. The existing FP are developed with enhanced deformability and load‐bearing capacity, yet their limits in electromagnetic wave (EMW) absorption and electromagnetic interference (EMI) shielding cannot meet practical applications of electromagnetic protection, and their interlayer bonding also needs to be strengthened. Besides, flexible electromagnetic protection materials (FEMPM) have been developed to address electromagnetic radiation in wearable electronics and other fields, yet their deformability and mechanical properties still need to be improved. Thereon, based on reasonable structure design and fabrication methods, delicate integration of FP and FEMPM can offer a significant paradigm to construct flexible electromagnetic protection patches (FEMPP) with great potentials in engineering applications. Herein, recent advances in FP as well as FEMPM are consolidated, and detailed development in multifunctional construction of FEMPP are involved. Furthermore, challenges and developing perspectives are also discussed, aiming to inspire the relevant researches and promote development in the related fields.

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Stretching induced alignment of graphene nanoplatelets in polyurethane films for superior in-plane thermal conductivity and electromagnetic interference shielding

Cited by 50 publications

References 45 publications

Flexible and Ultrathin Graphene/Aramid Nanofiber Carbonizing Films with Nacre-like Structures for Heat-Conducting Electromagnetic Wave Shielding/Absorption

Flexible and Ultrathin Graphene/Aramid Nanofiber Carbonizing Films with Nacre-like Structures for Heat-Conducting Electromagnetic Wave Shielding/Absorption

A review on electrically conductive polyurethane nanocomposites: From principle to application

Recent Advances and Future Prospects for Construction Strategies of Flexible Electromagnetic Protection Patches

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