Journal ArticleDOI
Graphene Epoxy-Based Composites as Efficient Electromagnetic Absorbers in the Extremely High-Frequency Band
Zahra Barani,Fariborz Kargar,Konrad Godziszewski,Adil Rehman,Yevhen Yashchyshyn,Yevhen Yashchyshyn,Sergey Rumyantsev,Grzegorz Cywiński,Grzegorz Cywiński,Wojciech Knap,Wojciech Knap,Alexander A. Balandin +11 more
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TLDR
The developed lightweight adhesive composites with graphene fillers can be used as electromagnetic absorbers in the high-frequency microwave radio relays, microwave remote sensors, millimeter wave scanners, and wireless local area networks.Abstract:
We report on the synthesis of the epoxy-based composites with graphene fillers and test their electromagnetic shielding efficiency by the quasi-optic free-space method in the extremely high-frequency (EHF) band (220-325 GHz). The curing adhesive composites were produced by a scalable technique with a mixture of single-layer and few-layer graphene layers of few-micrometer lateral dimensions. It was found that the electromagnetic transmission, T, is low even at small concentrations of graphene fillers: T<1% at a frequency of 300 GHz for a composite with only ϕ = 1 wt% graphene. The main shielding mechanism in composites with the low graphene loading is absorption. The composites of 1 mm in thickness and a graphene loading of 8 wt% provide an excellent electromagnetic shielding of 70 dB in the sub-terahertz EHF frequency band with negligible energy reflection to the environment. The developed lightweight adhesive composites with graphene fillers can be used as electromagnetic absorbers in the high-frequency microwave radio relays, microwave remote sensors, millimeter wave scanners, and wireless local area networks.read more
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Flexible Sandwich-Structured Electromagnetic Interference Shielding Nanocomposite Films with Excellent Thermal Conductivities.
TL;DR: In this paper, a flexible sandwich-structured EMI shielding nanocomposite films with excellent thermal conductivities and mechanical properties has been proposed for high power, portable, and wearable flexible electronic devices.
Journal ArticleDOI
Absorption-dominant, low reflection EMI shielding materials with integrated metal mesh/TPU/CIP composite
Seung Han Ryu,Jan Jeroen Vranckx,You Kyung Han,Suk Jin Kwon,Taehoon Kim,Byung Mun Jung,Sang-Bok Lee,Byeongjin Park +7 more
TL;DR: In this paper, a metal-mesh-supported polymer composite consisting of a reflection layer and an absorbing layer was proposed for 5G EMI shielding applications, which has a SER of only 2dB and a SEA of 46dB.
Journal ArticleDOI
Recent progress in polymer/two-dimensional nanosheets composites with novel performances
Mingbo Sun,Autumn Fiester +1 more
TL;DR: In this article , the authors summarized the preparation of various 2D nanosheets, including graphene, MXene, hexagonal boron nitrides (h-BN), ferroelectric ceramic and transition metal dichalcogenides (TMDs).
Journal ArticleDOI
Absorption-dominant, low reflection EMI shielding materials with integrated metal mesh/TPU/CIP composite
TL;DR: In this article , a metal-mesh-supported polymer composite consisting of a reflection layer and an absorbing layer was proposed for 5G EMI shielding applications, which has a SER of only 2 dB and a SEA of 46 dB.
Journal ArticleDOI
A critical review on the production and application of graphene and graphene-based materials in anti-corrosion coatings
Bohdan Kulyk,Maria A. Freitas,N. F. Santos,Farzin Mohseni,Alexandre F. Carvalho,Kiryl A. Yasakau,António J. S. Fernandes,Adriana Bernardes,Bruno R. Figueiredo,Rui J.C. Silva,João Tedim,Florinda M. Costa +11 more
TL;DR: Among the many potential applications of graphene and graphene-based materials, their use as protective films or as additives in coatings for corrosion protection has seen an increased level of interest.
References
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Journal ArticleDOI
Superior Thermal Conductivity of Single-Layer Graphene
Alexander A. Balandin,Suchismita Ghosh,Wenzhong Bao,Irene Calizo,Desalegne Teweldebrhan,Feng Miao,Chun Ning Lau +6 more
TL;DR: The extremely high value of the thermal conductivity suggests that graphene can outperform carbon nanotubes in heat conduction and establishes graphene as an excellent material for thermal management.
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Electromagnetic interference shielding with 2D transition metal carbides (MXenes)
Faisal Shahzad,Mohamed Alhabeb,Christine B. Hatter,Babak Anasori,Soon Man Hong,Chong Min Koo,Yury Gogotsi +6 more
TL;DR: The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.
Journal ArticleDOI
Electromagnetic interference shielding effectiveness of carbon materials
TL;DR: Carbon materials for electromagnetic interference (EMI) shielding are reviewed in this article, including composite materials, colloidal graphite and flexible graphite, and they include carbon filaments of submicron diameter.
Journal ArticleDOI
Lightweight and Flexible Graphene Foam Composites for High‐Performance Electromagnetic Interference Shielding
TL;DR: It is believed that high electrical conductivity and connectivity of the conductive fi llers can improve EMI shielding performance.
Journal ArticleDOI
Graphene–Multilayer Graphene Nanocomposites as Highly Efficient Thermal Interface Materials
TL;DR: The modeling results suggest that graphene-multilayer graphene nanocomposite used as the thermal interface material outperforms those with carbon nanotubes or metal nanoparticles owing to graphene's aspect ratio and lower Kapitza resistance at the graphene-matrix interface.