Journal ArticleDOI
Density-tunable lightweight polymer composites with dual-functional ability of efficient EMI shielding and heat dissipation.
Seung Hwan Lee,Seung Hwan Lee,Seunggun Yu,Seunggun Yu,Faisal Shahzad,Woo Nyon Kim,Woo Nyon Kim,Cheolmin Park,Soon Man Hong,Chong Min Koo,Chong Min Koo +10 more
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TLDR
The resulting composites are the best lightweight dual-functional materials with exceptionally high EMI SE and thermal conductivity performance among synthetic polymer composites.Abstract:
Lightweight dual-functional materials with high EMI shielding performance and thermal conductivity are of great importance in modern cutting-edge applications, such as mobile electronics, automotive, aerospace, and military. Unfortunately, a clear material solution has not emerged yet. Herein, we demonstrate a simple and effective way to fabricate lightweight metal-based polymer composites with dual-functional ability of excellent EMI shielding effectiveness and thermal conductivity using expandable polymer bead-templated Cu hollow beads. The low-density Cu hollow beads (ρ ∼ 0.44 g cm−3) were fabricated through electroless plating of Cu on the expanded polymer beads with ultralow density (ρ ∼ 0.02 g cm−3). The resulting composites that formed a continuous 3D Cu network with a very small Cu content (∼9.8 vol%) exhibited excellent EMI shielding (110.7 dB at 7 GHz) and thermal conductivity (7.0 W m−1 K−1) with isotropic features. Moreover, the densities of the composites are tunable from 1.28 to 0.59 g cm−3 in accordance with the purpose of their applications. To the best of our knowledge, the resulting composites are the best lightweight dual-functional materials with exceptionally high EMI SE and thermal conductivity performance among synthetic polymer composites.read more
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Journal ArticleDOI
Anomalous absorption of electromagnetic waves by 2D transition metal carbonitride Ti3CNTx (MXene)
Aamir Iqbal,Aamir Iqbal,Aamir Iqbal,Faisal Shahzad,Kanit Hantanasirisakul,Myung Ki Kim,Jisung Kwon,Jun-Pyo Hong,Hyerim Kim,Hyerim Kim,Daesin Kim,Daesin Kim,Yury Gogotsi,Chong Min Koo,Chong Min Koo,Chong Min Koo +15 more
TL;DR: It is shown that a two-dimensional transition metal carbonitride, Ti3CNTx MXene, with a moderate electrical conductivity, provides a higher shielding effectiveness compared with more conductiveTi3C2Tx or metal foils of the same thickness.
Journal ArticleDOI
2D MXenes for Electromagnetic Shielding: A Review
Journal ArticleDOI
Electromagnetic Shielding of Monolayer MXene Assemblies.
Taeyeong Yun,Hyerim Kim,Hyerim Kim,Aamir Iqbal,Aamir Iqbal,Yong Soo Cho,Yong Soo Cho,Gang San Lee,Myung Ki Kim,Seon Joon Kim,Seon Joon Kim,Daesin Kim,Daesin Kim,Yury Gogotsi,Sang Ouk Kim,Chong Min Koo,Chong Min Koo,Chong Min Koo +17 more
TL;DR: A systematic exploration of EMI shielding behavior of 2D Ti3 C2 Tx MXene assembled films over a broad range of film thicknesses reveals an extraordinarily large absolute shielding effectiveness, which proposes a paradigm shift in shielding of lightweight, portable, and compact next-generation electronic devices.
Journal ArticleDOI
Flame-retardant poly(vinyl alcohol)/MXene multilayered films with outstanding electromagnetic interference shielding and thermal conductive performances
Xiuxiu Jin,Xiuxiu Jin,Jianfeng Wang,Lunzhi Dai,Xiaoya Liu,Lei Li,Yanyu Yang,Yanxia Cao,Wanjie Wang,Hong Wu,Shaoyun Guo +10 more
TL;DR: In this paper, a multilayered polyvinyl alcohol/transition metal carbide (PVA/MXene) film with alternating multilayer structure was fabricated through multi-layered casting and the continuous MXene layer provided a compact network for conducting heat and electron.
Journal ArticleDOI
Fabrication on the annealed Ti3C2Tx MXene/Epoxy nanocomposites for electromagnetic interference shielding application
TL;DR: In this article, a few-layered Ti3C2Tx MXene was fabricated by ionic intercalation and sonication-assisted method, followed by thermal reduction at medium-low temperature.
References
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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
An ultra-lightweight design for imperceptible plastic electronics
Martin Kaltenbrunner,Tsuyoshi Sekitani,Tsuyoshi Sekitani,Jonathan T. Reeder,Jonathan T. Reeder,Tomoyuki Yokota,Kazunori Kuribara,Takeyoshi Tokuhara,Michael Drack,Reinhard Schwödiauer,Ingrid Graz,Simona Bauer-Gogonea,Siegfried Bauer,Takao Someya,Takao Someya +14 more
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Journal ArticleDOI
Ultra-low electrical percolation threshold in carbon-nanotube-epoxy composites
TL;DR: The experimental percolation threshold for the aligned carbon nanotubes used in this paper represents the lowest threshold observed for carbon-nanotube-based polymer composites yet reported.
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.