Article
Polymer Science
Yi-Huan Ho, Yan-Yu Lin, Mei-Chen Lin, Ching-Wen Lou, Yueh-Sheng Chen, Jia-Horng Lin
Summary: This study proposes composites with a sandwich structure made by a multi-step foaming process. Polyurethane foam is combined with carbon fibers and a Kevlar woven fabric. The composites are evaluated for puncture resistance, buffer absorption, and electromagnetic wave shielding effectiveness. The manufacturing process efficiently provides a stabilized structure to the composites. The test results show that the PU foam composites have multiple functions and can be used as a protective material in diverse fields.
Article
Engineering, Manufacturing
Yuye Yan, Bin Wu, Gang Qian, Huiya Lan, Md Mofasserul Alam, Ru Xia, Jiasheng Qian
Summary: A versatile composite material, consisting of polydimethylsiloxane (PDMS) with a continuous carbon fiber (CFs) network structure connected via carbon nanotubes (CNTs) containing cobalt nanoparticles, has been fabricated. The composite demonstrates excellent electromagnetic shielding effectiveness in the ultra-wideband range of 8 to 40 GHz, reaching as high as 75.33 dB in the Ka-band, due to its allgraphene topological network and stable magnetism. Additionally, the composite exhibits a thermal conductivity of 1.08 W m(-1) K-1, thanks to the effective thermal conduction pathways formed by CNTs and CFs. Even after 1000 bending tests, the composite maintains high electromagnetic shielding and thermal conductivity, confirming its outstanding structural stability. This versatile composite material holds great potential for applications in precision electronic devices.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Chemistry, Physical
Dong-Kyu Kim, Woong Han, Kwan-Woo Kim, Byung-Joo Kim
Summary: In this study, carbon nanotubes (CNTs) were grown directly on the surfaces of carbon fibers and glass fibers, and their potential as electromagnetic interference (EMI) shielding materials was compared. The growth of CNTs on the fiber surfaces was achieved using a chemical vapor deposition process. The morphology and structure of the CNTs were analyzed, and the EMI shielding efficiency of composites containing these fibers was determined. The results showed that carbon fibers with grown CNTs had higher EMI shielding efficiency compared to glass fibers, indicating the potential for developing low-cost, high-quality EMI shielding materials using CNTs grown on glass fiber surfaces.
Article
Polymer Science
H. Lecocq, G. Sudre, P. Alcouffe, O. Lhost, P. Cassagnau, A. Serghei
Summary: This study investigates the electromagnetic interference shielding properties of polypropylene-based composite materials filled with different metallic fillers. By utilizing guided electrical percolation, the shielding effectiveness of the composites is substantially enhanced, as observed through various experimental techniques and analyses.
Article
Chemistry, Physical
Madeline A. Morales, Todd C. Henry, Lourdes G. Salamanca-Riba
Summary: This study investigated a multifunctional composite structure consisting of a carbon-fiber-reinforced polymer (CFRP) laminate with additional Cu mesh layers for electromagnetic interference (EMI) shielding in aerospace applications. The addition of Cu mesh layers improved the EMI shielding effectiveness (SE) of the structure. A finite element model was constructed to predict SE for different laminate lay-ups.
Article
Chemistry, Physical
Marina Tretjak, Sandra Pralgauskaite, Jonas Matukas, Artyom Plyushch, Jan Macutkevic, Juras Banys, Blagoj Karakashov, Vanessa Fierro, Alain Celzard
Summary: Studies on composite materials made from bisphenol A-based epoxy resin and carbon fiber felts show stable microwave properties and resistivity in a specific temperature range, suitable for electromagnetic shielding applications. The observed low-frequency voltage fluctuations in the materials follow a 1/f(alpha) characteristic, with an instability in the temperature range of 307 K to 332 K. This instability is accompanied by an increase in resistivity and noise intensity, but does not change the nature of the noise, and disappears after repeated heating and cooling cycles.
Article
Polymer Science
Houmin Jiang, Youzhang Zhu, Guofeng Zhao, Anwei Tian, Hengrong Li, Jian Li, Shuai Zhao, Guangfa Zhang, Ailin Gao, Jian Cui, Yehai Yan
Summary: By using highly conductive silvered aramid microfibers and conductive porous PDMS composite foams, absorption-dominated electromagnetic interference (EMI) shielding materials with high conductivity and lightweight characteristics were developed. These materials can be used in special constructions, aerospace, military equipments, and transportation, providing effective EMI shielding properties.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Engineering, Aerospace
Qin Wang, Yumeng Xu, Siyi Bi, Yinxiang Lu
Summary: A high-performance conductive AramidCarbon Blend Fabrics (ACBF) with cobalt-nickel (Co-Ni) alloy coatings were efficiently prepared for flexible Electromagnetic Interference (EMI) shielding materials, showing improved conductivity and mechanical properties as well as enhanced EMI Shielding Effectiveness (SE) value in the range of 30-6000 MHz. Analysis methods including XPS, SEM, EDX, and XRD confirmed the material properties and structural characteristics.
CHINESE JOURNAL OF AERONAUTICS
(2021)
Article
Materials Science, Composites
Ashish Kaushal, Vishal Singh
Summary: This study investigates the dc conductivity, mechanical properties, and EMI shielding response of MWCNT reinforced polypropylene nanocomposites prepared by melt processing. The results show improved tensile strength and electrical conductivity, with significant EMI shielding effectiveness achieved at 5 wt% MWCNT load in the X-band frequency range. The prepared nanocomposite is considered suitable for industrial shielding applications due to its mechanical durability.
POLYMER COMPOSITES
(2021)
Review
Materials Science, Multidisciplinary
Hong-Yan Zhang, Jin-Yao Li, Ying Pan, Yi-Fan Liu, Nasir Mahmood, Xian Jian
Summary: With the rapid development of electronic information technology, the waste electromagnetic radiation generated by wireless and electronic devices has become a serious threat to human health. Developing efficient and flexible electromagnetic interference (EMI) shielding materials is an effective approach to combat electromagnetic pollution. Flexible carbon fiber composites possess the necessary physical properties for EMI shielding applications, and the addition of different filler materials can further enhance the shielding performance. This review also summarizes the novel structural designs of flexible carbon fiber-based EMI shielding materials.
Article
Materials Science, Composites
Xiaodong Gao, Weimin Yang, Jing Tan, Lijian Song, Lisheng Cheng, Xiaolong Tian
Summary: This article introduces a study on the fabrication of new composite materials by hybridizing conductive nanocarbon-coated glass fibers with polymers. The results show that the composite material has good electrical conductivity and thermal conductivity, making it suitable for applications such as electromagnetic shielding.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Multidisciplinary
Taha Yasin Eken, Cantekin Kaykilarli, Burak Kucukelyas, Mehmet Baris Tabakcioglu
Summary: This study successfully produced 2-layer CFRP composites reinforced with hematite and goethite nanoparticles and investigated their performance in EMI shielding effectiveness and impact strength. The results showed that the samples with hematite particles of 50 nm exhibited the highest EMI shielding effectiveness, and the hematite nanoparticles also improved the impact strength of the composites.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Materials Science, Textiles
Gulsah Pamuk, Ozlem Kayacan, Ozan Kayacan, Sebnem Seckin Ugurlu
Summary: This study investigates the electromagnetic shielding performance of hybrid and 100% carbon woven fabrics in different frequencies. It is found that carbon-based woven fabrics have optimum shielding efficiency at different frequencies. The amount of carbon yarn in the fabric structure improves the shielding effectiveness. Among different weave types, twill 2/1 fabric construction shows the best performance due to a larger number of intersection points of yarns.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Review
Chemistry, Physical
Rajesh Kumar, Sumanta Sahoo, Ednan Joanni, Rajesh K. Singh, Wai Kian Tan, Kamal K. Kar, Atsunori Matsuda
Summary: The demand for electromagnetic interference (EMI) shielding has risen significantly due to rapid developments in the electronics industry. New materials like carbon-based nanostructures, polymers, and MXene-based 2D layered materials are being explored as alternatives to conventional metal sheets for EMI shielding, offering advantages such as low weight, cost-effectiveness, and good thermal/electrical properties. Composite materials combining polymers with conducting carbon fillers have potential as EM wave absorbers, while MXene-based materials have garnered attention for their application in EMI shielding.
Article
Spectroscopy
Hideyuki Shinzawa, Hiroki Itasaka
Summary: Disrelation mapping was applied to investigate submolecular-level variations at the interface between glass fiber and polypropylene. The maps revealed the predominant development of a long helix band at the interface, indicating the role of glass fiber or compatibilizer as a nucleating agent for the crystalline structure of polypropylene. The results suggest that this development leads to a harder but more brittle polymer system.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)