Journal ArticleDOI
Enhancing the EMI shielding of natural rubber-based supercritical CO2 foams by exploiting their porous morphology and CNT segregated networks.
Yanhu Zhan,Yanhu Zhan,Maria Oliviero,Jian Wang,Andrea Sorrentino,Giovanna G. Buonocore,Luigi Sorrentino,Marino Lavorgna,Hesheng Xia,Salvatore Iannace +9 more
TLDR
This work provides the fundamentals for the design of innovative light weight and efficient EMI shielding foams characterized by a three-dimensional segregated CNT network with huge potential for use in the electronics and aerospace industries.Abstract:
Natural rubber/carbon nanotubes composite foams (F-NR/CNTs) with high electrical conductivity and excellent electromagnetic interference (EMI) performance were developed through a multi-step process including: (a) CNTs assembled on natural rubber latex particles, (b) pre-crosslinking of natural rubber, (c) supercritical carbon dioxide foaming of pre-crosslinked composite samples and (d) post-crosslinking of foamed composite samples. A closed-cell porous structure and a segregated CNT network are clearly observed in the resulting foams. Due to this morphology, F-NR/CNTs exhibit low density, good mechanical properties, and high electrical conductivity. Owing to the multiple radiation reflections and scattering between the cell–matrix interfaces, the composite foams presented an excellent specific shielding effectiveness (SSE) of 312.69 dB cm2 g−1 for F-NR/CNTs containing 6.4 wt% of CNTs, which is significantly higher than those already published for rubber composites containing comparable filler content. Furthermore, the analysis of EMI SE highlights that absorption efficiency is more significant than reflection efficiency, implying that most of the incident electromagnetic radiation is dissipated in the form of heat. This work provides the fundamentals for the design of innovative light weight and efficient EMI shielding foams characterized by a three-dimensional segregated CNT network with huge potential for use in the electronics and aerospace industries.read more
Citations
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Construction, mechanism and prospective of conductive polymer composites with multiple interfaces for electromagnetic interference shielding: A review
TL;DR: In this paper, the authors reviewed conductive polymer composites (CPC) with multiple interfaces which have demonstrated to improve EMI SE, including foamed/porous, segregated, multi-component, multilayered/sandwiched and prefabricated conductive networks.
Journal ArticleDOI
Nanocellulose-MXene Biomimetic Aerogels with Orientation-Tunable Electromagnetic Interference Shielding Performance
Zhihui Zeng,Changxian Wang,Gilberto Siqueira,Daxin Han,Anja Huch,Sina Abdolhosseinzadeh,Sina Abdolhosseinzadeh,Jakob Heier,Frank Nüesch,Frank Nüesch,Chuanfang John Zhang,Gustav Nyström,Gustav Nyström +12 more
TL;DR: A significant influence of the angles between oriented cell walls and the incident EM wave electric field direction on the EMI shielding performance is revealed, providing an intriguing microstructure design strategy.
Journal ArticleDOI
Multifunctional microcellular PVDF/Ni-chains composite foams with enhanced electromagnetic interference shielding and superior thermal insulation performance
Hongming Zhang,Guangcheng Zhang,Qiang Gao,Meng Tang,Zhonglei Ma,Jianbin Qin,Mingyue Wang,Jang Kyo Kim +7 more
TL;DR: In this article, a low-cost and scalable method for the design of novel, lightweight, thermal insulation and efficient EMI shielding composite foams characterized by optimized microcellular structure and conductive-magnetic Ni-chains networks with promising prospect for applications in construction, aerospace and electronics filed.
Journal ArticleDOI
Flexible, stretchable and electrically conductive MXene/natural rubber nanocomposite films for efficient electromagnetic interference shielding
TL;DR: In this article, the authors demonstrate an efficient vacuum assisted filtration approach for the fabrication of flexible and highly conductive Ti3C2Tx MXene/natural rubber (NR) nanocomposite films by constructing interconnected MXene networks in NR matrix.
Journal ArticleDOI
Highly stretchable electromagnetic interference (EMI) shielding segregated polyurethane/carbon nanotube composites fabricated by microwave selective sintering
TL;DR: In this article, carbon nanotubes (CNTs) were used as microwave absorbers in the thermoplastic polyurethane (TPU) media, which promoted the molecular diffusion among TPU granules only in the interface region without damaging the segregated structure.
References
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Journal ArticleDOI
Tough Graphene−Polymer Microcellular Foams for Electromagnetic Interference Shielding
TL;DR: This work provides a promising methodology to fabricate tough and lightweight graphene-PMMA nanocomposite micro cellular foams with superior electrical and EMI shielding properties by simultaneously combining the functionality and reinforcement of the graphene sheets and the toughening effect of the microcellular cells.
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Polymer/carbon based composites as electromagnetic interference (EMI) shielding materials
Jean-Michel Thomassin,Christine Jérôme,Thomas Pardoen,Christian Bailly,Isabelle Huynen,Christophe Detrembleur +5 more
TL;DR: A review of the state-of-the-art research in the design and characterization of polymer/carbon based composites as EMI shielding materials can be found in this paper.
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Lightweight and Anisotropic Porous MWCNT/WPU Composites for Ultrahigh Performance Electromagnetic Interference Shielding
TL;DR: In this paper, an anisotropic porous multiwalled carbon nanotube (MWCNT)/water-borne polyurethane (WPU) composites are assembled by a facile freeze-drying method.
Journal ArticleDOI
Conductive polymer composites with segregated structures
TL;DR: Segregated polymer composites (s-CPCs) as discussed by the authors contain conductive fillers that are segregated in the perimeters of the polymeric granules instead of being randomly distributed throughout the bulk CPC material; these materials are overwhelmingly superior compared to normal CPCs.
Journal ArticleDOI
Highly Conductive Transition Metal Carbide/Carbonitride(MXene)@polystyrene Nanocomposites Fabricated by Electrostatic Assembly for Highly Efficient Electromagnetic Interference Shielding
TL;DR: In this paper, an electrostatic assembly approach for fabricating highly conductive MXene@polystyrene nanocomposites by electrostatic assembling of negative MXene nanosheets on positive polystyrene microspheres is demonstrated, followed by compression molding.