1
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Huang C, Liang M, Wang B, Su R, Feng Y, Xing W, Zhao X, Bian X, You Z, You R. In Situ Laser-Induced 3D Porous Graphene within Transparent Polymers for Encapsulation-Free and Tunable Ultrabroadband Terahertz Absorption. ACS APPLIED MATERIALS & INTERFACES 2024; 16:26557-26567. [PMID: 38736285 DOI: 10.1021/acsami.4c03055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2024]
Abstract
Three-dimensional (3D) porous carbon materials have great potential for fabricating flexible tunable broadband absorbers owing to their high electrical conductivity, strong dielectric loss, and unique microstructure. Herein, we introduce an innovative method for synthesizing 3D porous graphene that incorporates advanced tuning and encapsulation processes to augment its functional efficacy. Through the modulation of both thermal and nonthermal interactions between a femtosecond (fs) laser and a polydimethylsiloxane (PDMS) film, we have synergistically fine-tuned the surface morphology and lattice properties of 3D porous graphene. This approach enabled us to create a flexible terahertz (THz) absorber with customizable characteristics, boasting an impressive absorbance range of 80%-99% in the 0.4-1.0 THz spectrum, alongside a peak reflection loss (RL) of up to 35.6 dB. Furthermore, we have successfully demonstrated the production of photoinduced 3D porous graphene within a PDMS film, which serves as both a carbon precursor and protective layer. This simplifies the conventional packaging process. These devices exhibit a RL of up to 41.6 dB and an absorption bandwidth of 2.5 THz (0.6-3.1 THz). Our study presents a production methodology for high-performance, flexible THz absorbers, offering a straightforward and innovative solution for the rapid development of sophisticated, flexible THz absorbing materials.
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Affiliation(s)
- Chaojun Huang
- Laboratory of Intelligent Microsystems, School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
| | - Misheng Liang
- Laboratory of Intelligent Microsystems, School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
| | - Bo Wang
- Institute of Medical Equipment Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
- Jingzhen Medical Technology, Ltd., Beijing 102600, China
- Matrix Medical Technology, Ltd., Jiangsu 215024, China
| | - Ruige Su
- Laboratory of Intelligent Microsystems, School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
| | - Yanshuo Feng
- Laboratory of Intelligent Microsystems, School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
| | - Wenqiang Xing
- Laboratory of Intelligent Microsystems, School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
| | - Xiaoguang Zhao
- Department of Precision Instrument, Tsinghua University, Beijing 100084, China
| | - Xiaomeng Bian
- Laboratory of Intelligent Microsystems, School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
| | - Zheng You
- Department of Precision Instrument, Tsinghua University, Beijing 100084, China
| | - Rui You
- Laboratory of Intelligent Microsystems, School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, Beijing 100192, China
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2
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Park J, Kim S, Hwang J, Choi JH, So Y, Park S, Ko MJ, Won JC, Suk J, Wu M, Kim YH. Highly Macroporous Polyimide with Chemical Versatility Prepared from Poly(amic acid) Salt-Stabilized High Internal Phase Emulsion Template. ACS OMEGA 2024; 9:15222-15231. [PMID: 38585077 PMCID: PMC10993319 DOI: 10.1021/acsomega.3c09640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 02/28/2024] [Accepted: 03/06/2024] [Indexed: 04/09/2024]
Abstract
Macroporous polymers have gained significant attention due to their unique mass transport and size-selective properties. In this study, we focused on Polyimide (PI), a high-performance polymer, as an ideal candidate for macroporous structures. Despite various attempts to create macroporous PI (Macro PI) using emulsion templates, challenges remained, including limited chemical diversity and poor control over pore size and porosity. To address these issues, we systematically investigated the role of poly(amic acid) salt (PAAS) polymers as macrosurfactants and matrices. By designing 12 different PAAS polymers with diverse chemical structures, we achieved stable high internal phase emulsions (HIPEs) with >80 vol % internal volume. The resulting Macro PIs exhibited exceptional porosity (>99 vol %) after thermal imidization. We explored the structure-property relationships of these Macro PIs, emphasizing the importance of controlling pore size distribution. Furthermore, our study demonstrated the utility of these Macro PIs as separators in Li-metal batteries, providing stable charging-discharging cycles. Our findings not only enhance the understanding of emulsion-based macroporous polymers but also pave the way for their applications in advanced energy storage systems and beyond.
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Affiliation(s)
- Jongmin Park
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Sunkyu Kim
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- Department
of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Jeonguk Hwang
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Jun Ha Choi
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic
of Korea
| | - Yujin So
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Sarang Park
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Min Jae Ko
- Department
of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Jong Chan Won
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- KRICT
School, University of Science and Technology
(UST), Daejeon 34113, Republic of Korea
| | - Jungdon Suk
- KRICT
School, University of Science and Technology
(UST), Daejeon 34113, Republic of Korea
- Advanced
Energy Materials Research Center, Korea
Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Mihye Wu
- Advanced
Energy Materials Research Center, Korea
Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
| | - Yun Ho Kim
- Advanced
Functional Polymers Center, Korea Research
Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea
- KRICT
School, University of Science and Technology
(UST), Daejeon 34113, Republic of Korea
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3
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Mehmood Z, Shah SAA, Omer S, Idrees R, Saeed S. Scalable synthesis of high-quality, reduced graphene oxide with a large C/O ratio and its dispersion in a chemically modified polyimide matrix for electromagnetic interference shielding applications. RSC Adv 2024; 14:7641-7654. [PMID: 38440276 PMCID: PMC10910857 DOI: 10.1039/d4ra00329b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 02/23/2024] [Indexed: 03/06/2024] Open
Abstract
High-purity reduced graphene oxide (RGO or rGO) with appreciable conductivity is a desired conductive filler for lightweight polymer composites used in coatings, electronics, catalysts, electromagnetic interference (EMI) shielding, and energy storage devices. However, the intrinsic conductivity and the uniform dispersion of RGO in relatively polar matrices are challenging, leading to poor overall conductivity and performance of the composite material. The reported study improved the RGO intrinsic conductivity by increasing its C/O ratio while also simultaneously enhancing its compatibility with the polyimide (PI) matrix through ester linkages for better dispersion. A two-step reduction method drastically increased the number of structural defects and carbon content in the resulting RGO, corresponding to a maximum ID/IG and C/O of 1.54 and ∼87, respectively. Moreover, the 2D nanosheets with limited hydroxyl (-OH) groups effectively interacted with anhydride-terminated polyamic acid (AT-PAA) through chemical linkages to make high-performance RGO/PI nanocomposites. Consequently, the polymer matrix composites possessed the highest direct current conductivity of 15.27 ± 0.61 S cm-1 for 20 wt% of the prepared RGO. Additionally, the composite material was highly stiff (3.945 GPa) yet flexible (easily bent through 180°), lightweight (∼0.34 g cm-3), and capable of forming thin films (162 ± 15 μm). Unlike most polymer matrix composites, it showcased one of its class's highest thermal stabilities (a weight loss of only 5% at 638 °C). Ultimately, the composite performed as an effective electromagnetic interference (EMI) shielding material in the X-Band (8 to 12 GHz), demonstrating outstanding shielding effectiveness (SE), shielding effectiveness per unit thickness (SEt), specific shielding effectiveness (SSE), and absolute shielding effectiveness (SSEt) of 46 dB, 2778 dB cm-2, 138 dB cm3 g-1, and 8358 dB cm2 g-1, respectively. As a consequence of this research, the high-purity RGO and its high-performance PI matrix nanocomposites are anticipated to find practical applications in conductive coatings and flexible substrates demanding high-temperature stability.
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Affiliation(s)
- Zahid Mehmood
- Department of Chemistry, Pakistan Institute of Engineering and Applied Sciences (PIEAS) Islamabad-45650 Pakistan
| | - Syed Aizaz Ali Shah
- Department of Chemistry, Pakistan Institute of Engineering and Applied Sciences (PIEAS) Islamabad-45650 Pakistan
| | - Saeed Omer
- Department of Chemistry, Pakistan Institute of Engineering and Applied Sciences (PIEAS) Islamabad-45650 Pakistan
| | - Ramsha Idrees
- Department of Chemistry, Pakistan Institute of Engineering and Applied Sciences (PIEAS) Islamabad-45650 Pakistan
| | - Shaukat Saeed
- Department of Chemistry, Pakistan Institute of Engineering and Applied Sciences (PIEAS) Islamabad-45650 Pakistan
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4
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Zheng X, Zhang H, Jiang R, Liu Z, Zhu S, Li W, Jiang L, Zhou X. Lightweight polyurethane composite foam for electromagnetic interference shielding with high absorption characteristic. J Colloid Interface Sci 2023; 649:279-289. [PMID: 37348347 DOI: 10.1016/j.jcis.2023.06.104] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/24/2023]
Abstract
Due to the rapid growth of electronic equipment technology, efficient electromagnetic shielding materials are needed for equipment and human protection. Among them, foam shielding materials with absorption as the primary mechanism have higher application value than highly reflective materials. Highly absorbing shielding materials can reduce the secondary pollution caused by electromagnetic wave reflection. In this study, we added Fe3O4@Polyvinyl alcohol (Fe3O4@PVA) and graphene oxide@silver (GO@Ag) into the polyurethane (PU) matrix and constructed Fe3O4@PVA and GO@Ag/PU composite foam by foaming. Fe3O4@PVA and GO@Ag form an excellent network structure in the PU foam skeleton, significantly improving its electromagnetic shielding effectiveness (EMI SE) and mechanical properties. The shielding effectiveness reached 30.9 dB with a specific EMI SE (SSE) of 274.9 dB × cm3 × g-1 at a Fe3O4@PVA filling of 7 wt%, where the electromagnetic wave absorption accounted for more than 80 % of the total EMI SE, proving absorption as the primary shielding mechanism. The results show that Fe3O4, as a ferromagnet, has both the dielectric loss of ferroelectric materials and the hysteresis loss of ferromagnetic materials in electromagnetic shielding, effectively improving the wave absorption performance of composite shielding materials. Therefore, this work provides a promising idea for efficient and lightweight wave-absorbing shielding materials in aerospace, portable electronic devices and lightweight wearable devices.
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Affiliation(s)
- Xiangyu Zheng
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Haiwei Zhang
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Rijia Jiang
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Zhihao Liu
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Shanshan Zhu
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Wenyao Li
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Li Jiang
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Xing Zhou
- School of Chemistry and Life sciences, Suzhou University of Science and Technology, Suzhou 215009, China.
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5
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Zeng F, Zheng Y, Wei Y, Li H, Wang Q, Shi J, Wang Y, Hong X. Multifunctional Silver Nanowire Fabric Reinforced by Hot Pressing for Electromagnetic Interference Shielding, Electric Heating, and Sensing. Polymers (Basel) 2023; 15:4258. [PMID: 37959938 PMCID: PMC10650845 DOI: 10.3390/polym15214258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
Durability and multifunctionality are crucial considerations in the realm of electronic textiles. Herein, a hot-pressing process has been developed to enhance the fixation of silver nanowires (AgNWs) on polyethylene terephthalate (PET) fabric. The conductivity, electromagnetic shielding, and electric heating properties of the hot-pressed fabric were measured to demonstrate the effectiveness of the hot-pressing process. The conductivity of the hot-pressed fabric (180 °C for 90 s) was found to be 464.2 S/m, while that of the fabric without hot pressing was 94.9 S/m. The washed hot-pressed fabric was able to provide a maximum electromagnetic shielding of 17 dB, a negative strain sensing performance (the ΔR/R0 of the hot-pressed fabric was maintained at -15%), and an outstanding electric heating property (the temperature reached 110 °C at a current of 0.08 A). This AgNW fabric holds great potential for use in multi-functional wearable devices, and the hot-pressing process improved its stability and durability, making it suitable for industrial production.
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Affiliation(s)
- Fangmeng Zeng
- International Silk Institute, Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, College of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; (F.Z.); (Y.Z.); (Y.W.); (H.L.); (Q.W.)
| | - Yiqian Zheng
- International Silk Institute, Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, College of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; (F.Z.); (Y.Z.); (Y.W.); (H.L.); (Q.W.)
| | - Yuxin Wei
- International Silk Institute, Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, College of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; (F.Z.); (Y.Z.); (Y.W.); (H.L.); (Q.W.)
| | - Han Li
- International Silk Institute, Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, College of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; (F.Z.); (Y.Z.); (Y.W.); (H.L.); (Q.W.)
| | - Qicai Wang
- International Silk Institute, Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, College of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; (F.Z.); (Y.Z.); (Y.W.); (H.L.); (Q.W.)
| | - Jian Shi
- Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 441053, China
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
| | - Yong Wang
- International Silk Institute, Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, College of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; (F.Z.); (Y.Z.); (Y.W.); (H.L.); (Q.W.)
- School of Textile and Garment, Anhui Polytechnic University, Wuhu 241000, China
| | - Xinghua Hong
- International Silk Institute, Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, College of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; (F.Z.); (Y.Z.); (Y.W.); (H.L.); (Q.W.)
- Department of Materials Science and Engineering, National University of Singapore, Singapore 117575, Singapore
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6
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Mo C, Lei X, Tang X, Wang M, Kang ET, Xu L, Zhang K. Nanoengineering Natural Leather for Dynamic Thermal Management and Electromagnetic Interference Shielding. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303368. [PMID: 37328446 DOI: 10.1002/smll.202303368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/28/2023] [Indexed: 06/18/2023]
Abstract
Unpredictable and extreme weather conditions, along with increasing electromagnetic pollution, have resulted in a significant threat to human health and productivity, causing irreversible damage to society's well-being and economy. However, existing personal temperature management and electromagnetic protection materials lack adaptability to dynamic environmental changes. To address this, a unique asymmetric bilayer leather/a-MWCNTs/CA fabric is developed by vacuum-infiltrating interconnected a-MWCNTs networks into natural leather's microfiber backbone and spraying porous acetic acid (CA) on the reverse side. Such fabric achieves simultaneous passive radiation cooling, heating, and anti-electromagnetic interference functions without external energy input. The fabric's cooling layer has high solar reflectance (92.0%) and high infrared emissivity (90.2%), providing an average subambient radiation cooling effect of 10 °C, while the heating layer has high solar absorption (98.0%), enabling excellent passive radiative heating and effective compensation for warming via Joule heating. Additionally, the fabric's 3D conductive a-MWCNTs network provides electromagnetic interference shielding effectiveness of 35.0 dB mainly through electromagnetic wave absorption. This multimode electromagnetic shielding fabric can switch between cooling and heating modes to adapt to dynamic cooling and heating scenarios, providing a new avenue for sustainable temperature management and electromagnetic protection applications.
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Affiliation(s)
- Caiqing Mo
- School of Materials and Energy, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China
| | - Xiaojuan Lei
- College of Food Science, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China
| | - Xuelian Tang
- School of Materials and Energy, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China
| | - Ming Wang
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China
| | - En-Tang Kang
- School of Materials and Energy, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China
| | - Liqun Xu
- School of Materials and Energy, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China
| | - Kai Zhang
- School of Materials and Energy, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, Southwest University, Chongqing, 400715, P. R. China
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7
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Sun J, Zhou D. Advances in Graphene-Polymer Nanocomposite Foams for Electromagnetic Interference Shielding. Polymers (Basel) 2023; 15:3235. [PMID: 37571129 PMCID: PMC10421437 DOI: 10.3390/polym15153235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
With the continuous advancement of wireless communication technology, the use of electromagnetic radiation has led to issues such as electromagnetic interference and pollution. To address the problem of electromagnetic radiation, there is a growing need for high-performance electromagnetic shielding materials. Graphene, a unique carbon nanomaterial with a two-dimensional structure and exceptional electrical and mechanical properties, offers advantages such as flexibility, light weight, good chemical stability, and high electromagnetic shielding efficiency. Consequently, it has emerged as an ideal filler in electromagnetic shielding composites, garnering significant attention. In order to meet the requirements of high efficiency and low weight for electromagnetic shielding materials, researchers have explored the use of graphene-polymer nanocomposite foams with a cellular structure. This mini-review provides an overview of the common methods used to prepare graphene-polymer nanocomposite foams and highlights the electromagnetic shielding effectiveness of some representative nanocomposite foams. Additionally, the future prospects for the development of graphene-polymer nanocomposite foams as electromagnetic shielding materials are discussed.
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Affiliation(s)
- Jiaotong Sun
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China;
- School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
- Chongqing Loncin Industries Co., Ltd., Chongqing 400060, China
| | - Dan Zhou
- School of Materials Science and Engineering, Yangtze Normal University, Chongqing 408100, China;
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8
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Fabrication of Rigid Isocyanate-Based Polyimide Foam Achieved Excellent Use Safety via Synergy between Expandable Graphite and Phosphorus-Containing Polyol. Polymers (Basel) 2023; 15:polym15061381. [PMID: 36987162 PMCID: PMC10052713 DOI: 10.3390/polym15061381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/04/2023] [Accepted: 01/05/2023] [Indexed: 03/12/2023] Open
Abstract
For the advantages of low cost, excellent thermal insulation, and sound absorption properties, the rigid isocyanate-based polyimide foam (RPIF) presents great application prospects as a building insulation material. However, its inflammability and the accompanying toxic fumes create huge safety hazard. In this paper, reactive phosphate-containing polyol (PPCP) is synthesized and employed with expandable graphite (EG) to obtain RPIF with excellent use safety. EG can be considered as an ideal partner for PPCP to weaken the drawbacks in toxic fume release. Limiting oxygen index (LOI), cone calorimeter test (CCT), and toxic gas results show that the combination of PPCP and EG can synergistically enhance flame retardancy and the use safety of RPIF owing to the unique structure of a dense char layer possessing a flame barrier and toxic gas adsorption effects. When EG and PPCP are simultaneously applied to the RPIF system, the higher EG dosage will bring higher positive synergistic effects in the use safety of RPIF. The most preferred ratio of EG and PPCP is 2:1 (RPIF-10-5) in this study; RPIF-10-5 shows the highest LOI, low CCT results and specific optical density of smoke, and low HCN concentration. This design and the findings are of great significance to improving the application of RPIF.
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9
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Sahoo R, Sundara R, Venkatachalam S. Silver Nanowires Coated Nitrocellulose Paper for High-Efficiency Electromagnetic Interference Shielding. ACS OMEGA 2022; 7:41426-41436. [PMID: 36406519 PMCID: PMC9670267 DOI: 10.1021/acsomega.2c05204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/04/2022] [Indexed: 06/16/2023]
Abstract
A thin and conductive coating on an environmentally friendly polymer is imperative for protecting sensitive electronic devices. In this regard, a series of silver nanowires (AgNWs) coated nitrocellulose (NC) papers are fabricated by a simple and fast processed vacuum-assisted filtration method by varying filtrate volume to address electromagnetic interference. Their structural and EMI shielding performance is analyzed. The submicron thick and the lighter paper reveal the conductive AgNWs interwoven on the rough NC surface, making a 2D in-planar structure. Due to a strongly interconnected network, the coated paper displays an exceptional electrical conductivity of 8603 S/m. Despite having a minimum AgNW coating thickness of ∼0.69 μm and an area density of 0.041 mg/cm2, an ultrahigh EMI shielding effectiveness (SE) of about 69.4 dB (a specific EMI SE (SE/t) of 1005797 dB/cm) in the entire X-band (8-12 GHz) region is achieved. The effective material parameters, extracted using plane-wave theory, indicate that AgNWs form closed current loops resulting in magnetic losses. These AgNWs coated NC papers synthesized by a simple procedure are promising EMI shielding materials for current emerging electronic devices.
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Affiliation(s)
- Raghunath Sahoo
- Microwave
Laboratory, Department of Physics, Indian
Institute of Technology Madras, Chennai, Tamil Nadu600036, India
- Alternative
Energy and Nanotechnology Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, Tamil Nadu600036, India
| | - Ramaprabhu Sundara
- Alternative
Energy and Nanotechnology Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, Tamil Nadu600036, India
| | - Subramanian Venkatachalam
- Microwave
Laboratory, Department of Physics, Indian
Institute of Technology Madras, Chennai, Tamil Nadu600036, India
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10
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Liu J, Nie Z, Qin R, Ou AP, Zhang T, Wang X, Liu XY. Structural Optimization of Polyimide Foam via Composition with Hyperbranched Polymer Modified Fluorinated Carbon Nanotubes. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2809-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Fabrication of lightweight flexible thermoplastic polyurethane/multiwalled carbon nanotubes composite foams for adjustable frequency-selective electromagnetic interference shielding by supercritical carbon dioxide. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Park J, Kwac LK, Kim HG, Park KY, Koo KW, Ryu DH, Shin HK. Electromagnetic-Interference-Shielding Effectiveness of Lyocell-Based Carbon Fabrics Carbonized at Various Temperatures. Molecules 2022; 27:molecules27175392. [PMID: 36080158 PMCID: PMC9457674 DOI: 10.3390/molecules27175392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 11/17/2022] Open
Abstract
Lyocell is a biodegradable filament yarn obtained by directly dissolving cellulose in a mixture of N-methylmorpholine-N-oxide and a non-toxic solvent. Therefore, herein, lyocell fabrics were employed as eco-friendly carbon-precursor substitutes for use as electromagnetic interference (EMI) shielding materials. First, a lyocell fabric treated with polyacrylamide via electron beam irradiation reported in a previous study to increase carbon yields and tensile strengths was carbonized by heating to 900, 1100, and 1300 °C. The carbonization transformed the fabric into a graphitic crystalline structure, and its electrical conductivity and EMI shielding effectiveness (SE) were enhanced despite the absence of metals. For a single sheet, the electrical conductivities of the lyocell-based carbon fabric samples at the different carbonization temperatures were 3.57, 5.96, and 8.91 S m−1, leading to an EMI SE of approximately 18, 35, and 82 dB at 1.5–3.0 GHz, respectively. For three sheets of fabric carbonized at 1300 °C, the electrical conductivity was 10.80 S m−1, resulting in an excellent EMI SE of approximately 105 dB. Generally, EM radiation is reduced by 99.9999% in instances when the EMI SE was over 60 dB. The EMI SE of the three lyocell-based carbon fabric sheets obtained at 1100 °C and that of all the sheets of the sample obtained at 1300 °C exceeded approximately 60 dB.
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Affiliation(s)
- Jihyun Park
- Institute of Carbon Technology, Jeonju University, Jeonju 55069, Korea
| | - Lee Ku Kwac
- Institute of Carbon Technology, Jeonju University, Jeonju 55069, Korea
| | - Hong Gun Kim
- Institute of Carbon Technology, Jeonju University, Jeonju 55069, Korea
| | | | - Ki Woo Koo
- HYOSUNG Advanced Materials Corporation, Jeonju 54849, Korea
| | - Dong-Hwa Ryu
- Olive Carbon & Solution Co., Ltd., Jeonju 54853, Korea
| | - Hye Kyoung Shin
- Institute of Carbon Technology, Jeonju University, Jeonju 55069, Korea
- Correspondence: ; Tel.: +82-63-220-3147; Fax: +82-63-220-3161
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13
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Omana L, Chandran A, John RE, Wilson R, George KC, Unnikrishnan N, Varghese SS, George G, Simon SM, Paul I. Recent Advances in Polymer Nanocomposites for Electromagnetic Interference Shielding: A Review. ACS OMEGA 2022; 7:25921-25947. [PMID: 35936479 PMCID: PMC9352219 DOI: 10.1021/acsomega.2c02504] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/06/2022] [Indexed: 05/27/2023]
Abstract
The mushrooming utilization of electronic devices in the current era produces electromagnetic interference (EMI) capable of disabling commercial and military electronic appliances on a level like never before. Due to this, the development of advanced materials for effectively shielding electromagnetic radiation has now become a pressing priority for the scientific world. This paper reviews the current research status of polymer nanocomposite-based EMI shielding materials, with a special focus on those with hybrid fillers and MXenes. A discussion on the theory of EMI shielding followed by a brief account of the most popular synthesis methods of EMI shielding polymer nanocomposites is included in this review. Emphasis is given to unravelling the connection between microstructures of the composites, their physical properties, filler type, and EMI shielding efficiency (EMI SE). Along with EMI shielding efficiency and conductivity, mechanical properties reported for EMI shielding polymer nanocomposites are also reviewed. An elaborate discussion on the gap areas in various fields where EMI shielding materials have potential applications is reported, and future directions of research are proposed to overcome the existing technological obstacles.
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Affiliation(s)
- Lekshmi Omana
- Department
of Physics, St. Berchmans College, Changanassery, Kerala 686101, India
| | - Anoop Chandran
- Department
of Physics, St. Cyril’s College, Adoor, Kerala 691554, India
| | - Reenu Elizabeth John
- Department
of Physics, Saintgits College of Engineering, Kottayam, Kerala 686532, India
| | - Runcy Wilson
- Department
of Chemistry, St. Cyril’s College, Adoor, Kerala 691554, India
| | | | | | - Steffy Sara Varghese
- Space
and Planetary Science Centre, Khalifa University, P.O. Box 127788, Abu Dhabi, UAE
| | - Gejo George
- Department
of Chemistry, St. Berchmans College, Changanassery, Kerala 686101, India
| | - Sanu Mathew Simon
- Department
of Physics, Mar Thoma College, Thiruvalla, Kerala 689103, India
| | - Issac Paul
- Department
of Physics, St. Berchmans College, Changanassery, Kerala 686101, India
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14
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Graphene Reinforced Anticorrosion Transparent Conductive Composite Film Based on Ultra-Thin Ag Nanofilm. MATERIALS 2022; 15:ma15144802. [PMID: 35888269 PMCID: PMC9319744 DOI: 10.3390/ma15144802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 11/17/2022]
Abstract
Transparent conductive films are widely used in electronic products and industrial fields. Ultra-thin Ag conductive nanofilm (ACF) was prepared on a soda lime silica glass (ordinary architectural glass) substrate with industrial magnetron sputtering equipment with AZO (Al2O3 doped ZnO) as the crystal bed and wetting layer. In order to improve the corrosion resistance and conductivity of the ACF, graphene nanosheets were modified on the surface of the ACF by electrospraying for the first time. The results show that this graphene modification could be carried out continuously on a meter scale. With the modification of the graphene layer, the corrosion rate of graphene-decorated ACF (G/ACF) can be reduced by 74.56%, and after 72 h of salt spray test, the conductivity of ACF samples without modification of graphene can be reduced by 34.1%, while the conductivity of G/ACF samples with modification of graphene can be reduced by only 6.5%. This work proves the potential of graphene modified ACF to prepare robust large-area transparent conductive film.
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15
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Recent Progress in Electromagnetic Interference Shielding Performance of Porous Polymer Nanocomposites—A Review. ENERGIES 2022. [DOI: 10.3390/en15113901] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The urge to develop high-speed data transfer technologies for futuristic electronic and communication devices has led to more incidents of serious electromagnetic interference and pollution. Over the past decade, there has been burgeoning research interests to design and fabricate high-performance porous EM shields to tackle this undesired phenomenon. Polymer nanocomposite foams and aerogels offer robust, flexible and lightweight architectures with tunable microwave absorption properties and are foreseen as potential candidates to mitigate electromagnetic pollution. This review covers various strategies adopted to fabricate 3D porous nanocomposites using conductive nanoinclusions with suitable polymer matrices, such as elastomers, thermoplastics, bioplastics, conducting polymers, polyurethanes, polyimides and nanocellulose. Special emphasis has been placed on novel 2D materials such as MXenes, that are envisaged to be the future of microwave-absorbing materials for next-generation electronic devices. Strategies to achieve an ultra-low percolation threshold using environmentally benign and facile processing techniques have been discussed in detail.
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16
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Zeng ZH, Wu N, Wei JJ, Yang YF, Wu TT, Li B, Hauser SB, Yang WD, Liu JR, Zhao SY. Porous and Ultra-Flexible Crosslinked MXene/Polyimide Composites for Multifunctional Electromagnetic Interference Shielding. NANO-MICRO LETTERS 2022; 14:59. [PMID: 35138506 PMCID: PMC8828842 DOI: 10.1007/s40820-022-00800-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/06/2022] [Indexed: 05/14/2023]
Abstract
Lightweight, ultra-flexible, and robust crosslinked transition metal carbide (Ti3C2 MXene) coated polyimide (PI) (C-MXene@PI) porous composites are manufactured via a scalable dip-coating followed by chemical crosslinking approach. In addition to the hydrophobicity, anti-oxidation and extreme-temperature stability, efficient utilization of the intrinsic conductivity of MXene, the interfacial polarization between MXene and PI, and the micrometer-sized pores of the composite foams are achieved. Consequently, the composites show a satisfactory X-band electromagnetic interference (EMI) shielding effectiveness of 22.5 to 62.5 dB at a density of 28.7 to 48.7 mg cm-3, leading to an excellent surface-specific SE of 21,317 dB cm2 g-1. Moreover, the composite foams exhibit excellent electrothermal performance as flexible heaters in terms of a prominent, rapid reproducible, and stable electrothermal effect at low voltages and superior heat performance and more uniform heat distribution compared with the commercial heaters composed of alloy plates. Furthermore, the composite foams are well attached on a human body to check their electromechanical sensing performance, demonstrating the sensitive and reliable detection of human motions as wearable sensors. The excellent EMI shielding performance and multifunctionalities, along with the facile and easy-to-scalable manufacturing techniques, imply promising perspectives of the porous C-MXene@PI composites in next-generation flexible electronics, aerospace, and smart devices.
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Affiliation(s)
- Zhi-Hui Zeng
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan, 250061, People's Republic of China.
| | - Na Wu
- Department of Chemistry and Applied Biosciences, ETH Zurich, CH-8093, Zurich, Switzerland
| | - Jing-Jiang Wei
- Laboratory for Cellulose and Wood Materials, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600, Dübendorf, Switzerland
| | - Yun-Fei Yang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan, 250061, People's Republic of China
| | - Ting-Ting Wu
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600, Dübendorf, Switzerland
| | - Bin Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan, 250061, People's Republic of China
| | - Stefanie Beatrice Hauser
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600, Dübendorf, Switzerland
| | - Wei-Dong Yang
- School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai, 200092, People's Republic of China
| | - Jiu-Rong Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan, 250061, People's Republic of China.
| | - Shan-Yu Zhao
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600, Dübendorf, Switzerland.
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17
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Benzaoui K, Ales A, Mekki A, Zaoui A, Bouaouina B, Singh A, Mehelli O, Derradji M. Electromagnetic interference shielding effectiveness of polypyrrole-silver nanocomposite films on silane-modified flexible sheet. HIGH PERFORM POLYM 2021. [DOI: 10.1177/09540083211064535] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The conventional electromagnetic interference (EMI) shielding materials are being gradually replaced by a new generation of supported conducting polymer composites (CPC) films due to their many advantages. This work presents a contribution on the effects of silane surface–modified flexible polypyrrole-silver nanocomposite films on the electromagnetic interference shielding effectiveness (EMI-SE). Thus, the UV-polymerization was used to in-situ deposit the PPy-Ag on the biaxial oriented polyethylene terephthalate (BOPET) flexible substrates whose surfaces were treated by 3-aminopropyltrimethoxysilane (APTMS). X-ray Photoelectron Spectroscopy (XPS) analyzes confirmed the APTMS grafting procedure. Structural, morphological, thermal, and electrical characteristics of the prepared films were correlated to the effect of substrate surface treatment. Thereafter, EMI-SE measurements of the elaborated films were carried out as per ASTM D4935 standard for a wide frequency band extending from 50 MHz to 18 GHz. The obtained results confirmed that the APTMS-treated BOPET film exhibit higher EMI shielding performance and better electrical characteristics compared to the untreated film. In fact, a 32% enhancement of EMI-SE was noted for the treated films compared to the untreated ones. Overall, these results put forward the role played by the surface treatment in strengthening the position of flexible PPy-Ag supported films as high-performance materials in electronic devices and electromagnetic interference shielding applications.
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Affiliation(s)
- Karim Benzaoui
- Laboratoire CEM, Electrotechnique, Ecole Militaire Polytechnique, Algiers, Algeria
| | - Achour Ales
- Laboratoire CEM, Electrotechnique, Ecole Militaire Polytechnique, Algiers, Algeria
| | - Ahmed Mekki
- Laboratoire de Chimie Macromoléculaire, Physico-Chimie des Matériaux, Ecole Militaire Polytechnique, Algiers, Algeria
| | - Abdelhalim Zaoui
- Laboratoire CEM, Electrotechnique, Ecole Militaire Polytechnique, Algiers, Algeria
| | | | - Ajay Singh
- Technical Physics Division, Bhabha Atomic Research Centre (BARC), Mumbai, India
| | - Oussama Mehelli
- Laboratoire de Génie des Procédés, Ecole Militaire Polytechnique, Algiers, Algeria
| | - Mehdi Derradji
- Laboratoire de Génie des Procédés, Ecole Militaire Polytechnique, Algiers, Algeria
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18
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Investigation on electromagnetic shielding and
antiultraviolet
radiation properties of
ZnO
@
AgNWs
/waterborne polyurethane composites. J Appl Polym Sci 2021. [DOI: 10.1002/app.52060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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Wei Y, Zhou H, Deng H, Ji W, Tian K, Ma Z, Zhang K, Fu Q. "Toolbox" for the Processing of Functional Polymer Composites. NANO-MICRO LETTERS 2021; 14:35. [PMID: 34918192 PMCID: PMC8677876 DOI: 10.1007/s40820-021-00774-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/17/2021] [Indexed: 05/31/2023]
Abstract
UNLABELLED The processing methods of functional polymer composites (FPCs) are systematically summarized in “Toolbox”. The relationship of processing method-structure-property is discussed and the selection and combination of tools in processing among different FPCs are analyzed. A promising prospect is provided regarding the design principle for high performance FPCs for further investigation. ABSTRACT Functional polymer composites (FPCs) have attracted increasing attention in recent decades due to their great potential in delivering a wide range of functionalities. These functionalities are largely determined by functional fillers and their network morphology in polymer matrix. In recent years, a large number of studies on morphology control and interfacial modification have been reported, where numerous preparation methods and exciting performance of FPCs have been reported. Despite the fact that these FPCs have many similarities because they are all consisting of functional inorganic fillers and polymer matrices, review on the overall progress of FPCs is still missing, and especially the overall processing strategy for these composites is urgently needed. Herein, a “Toolbox” for the processing of FPCs is proposed to summarize and analyze the overall processing strategies and corresponding morphology evolution for FPCs. From this perspective, the morphological control methods already utilized for various FPCs are systematically reviewed, so that guidelines or even predictions on the processing strategies of various FPCs as well as multi-functional polymer composites could be given. This review should be able to provide interesting insights for the field of FPCs and boost future intelligent design of various FPCs. [Image: see text] SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s40820-021-00774-5.
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Affiliation(s)
- Yun Wei
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Hongju Zhou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Hua Deng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China.
| | - Wenjing Ji
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Ke Tian
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Zhuyu Ma
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Kaiyi Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People's Republic of China
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20
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Liu J, Zhang Y, Cheng W, Lei S, Song L, Wang B, Hu Y. Anti-Fogging, Frost-Resistant transparent and flexible silver Nanowire-Ti 3C 2T x MXene based composite films for excellent electromagnetic interference shielding ability. J Colloid Interface Sci 2021; 608:2493-2504. [PMID: 34785055 DOI: 10.1016/j.jcis.2021.10.171] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 01/08/2023]
Abstract
The development of electronics proposes higher requirements for flexible, transparent, and conductive materials with high electromagnetic shielding performance in viewing windows. Flexible transparent films have been fabricated by collaborating one-dimensional silver nanowires (AgNWs) and novel two-dimensional Ti3C2Tx MXene sheets on PET films with an external polymeric coating consisting of poly (vinyl alcohol) (PVA) and poly(styrene sulfonate) (PSS). Especially, the combination of different dimensional nanomaterials effectively establishes a conductive network that exhibits a synergistic effect on excellent electromagnetic interference (EMI) shielding performance, which is superior to that of pure AgNW network or Ti3C2Tx network to some extent. By optimizing the AgNWs content (0.05 mg/cm2) and Ti3C2Tx sheets content (0.01 mg/cm2), the PET/AgNW/Ti3C2Tx/PVA-PSS film exhibits a transmittance of 81% and a desirable EMI SE value of 30.5 dB. In addition, the film shows outstanding anti-fogging and frost-resistant properties due to the remarkable water absorption capacity of PVA and PSS on the external surface. Considering its efficiency and simplicity, this transparent conductive film has promising applications in flexible transparent electronic devices and optical related fields.
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Affiliation(s)
- Jiajia Liu
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Yan Zhang
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China; Key Laboratory of Advanced Textile Materials and Manufacturing Technology and Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Zhejiang Sci Tech University, Hangzhou, Zhejiang 310018, People's Republic of China
| | - Wenhua Cheng
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Shijun Lei
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Lei Song
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Bibo Wang
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
| | - Yuan Hu
- State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
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21
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Cai J, Wang L, Duan H, Zhang Y, Wang X, Wan G, Zhong Z. Porous polyamide 6/carbon black composite as an effective electromagnetic interference shield. POLYM INT 2021. [DOI: 10.1002/pi.6311] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jie Cai
- Key Laboratory of Advanced Textiles Composites of Ministry of Education, School of Textiles Science and Engineering Tiangong University Tianjin P.R.China
| | - Liang Wang
- Key Laboratory of Advanced Textiles Composites of Ministry of Education, School of Textiles Science and Engineering Tiangong University Tianjin P.R.China
| | - Hongji Duan
- Key Laboratory of Functional Nanocomposites of Shanxi Province, College of Materials Science and Engineering North University of China Taiyuan China
| | - Ying Zhang
- Key Laboratory of Advanced Textiles Composites of Ministry of Education, School of Textiles Science and Engineering Tiangong University Tianjin P.R.China
| | - Xueying Wang
- Key Laboratory of Advanced Textiles Composites of Ministry of Education, School of Textiles Science and Engineering Tiangong University Tianjin P.R.China
| | - Gang Wan
- Jifa Group Limited Co. Qingdao China
| | - Zhili Zhong
- Key Laboratory of Advanced Textiles Composites of Ministry of Education, School of Textiles Science and Engineering Tiangong University Tianjin P.R.China
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22
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Ni L, Luo Y, Peng X, Zhou S, Zou H, Liang M. Investigation of the properties and structure of semi-rigid closed-cellular polyimide foams with different diamine structures. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123957] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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23
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Kausar A. Emerging polyimide and graphene derived nanocomposite foam: research and technical tendencies. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1934011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ayesha Kausar
- Nanosciences Division, National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
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24
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Xu J, Li R, Ji S, Zhao B, Cui T, Tan X, Gou G, Jian J, Xu H, Qiao Y, Yang Y, Zhang S, Ren TL. Multifunctional Graphene Microstructures Inspired by Honeycomb for Ultrahigh Performance Electromagnetic Interference Shielding and Wearable Applications. ACS NANO 2021; 15:8907-8918. [PMID: 33881822 DOI: 10.1021/acsnano.1c01552] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
High-performance electromagnetic interference (EMI) shielding materials with ultralow density, excellent flexibility, and good mechanical properties are highly desirable for aerospace and wearable electronics. Herein, honeycomb porous graphene (HPG) fabricated by laser scribing technology is reported for EMI shielding and wearable applications. Due to the honeycomb structure, the HPG exhibits an EMI shielding effectiveness (SE) up to 45 dB at a thickness of 48.3 μm. The single-piece HPG exhibits an ultrahigh absolute shielding effectiveness (SSE/t) of 240 123 dB cm2/g with an ultralow density of 0.0388 g/cm3, which is significantly superior to the reported materials such as carbon-based, MXene, and metal materials. Furthermore, MXene and AgNWs are employed to cover the honeycomb holes of the HPG to enhance surface reflection; thus, the SSE/t of the HPG/AgNWs composite membrane can reach up to 292 754 dB cm2/g. More importantly, the HPG exhibits excellent mechanical stability and durability in cyclic stretching and bending, which can be used to monitor weak physiological signals such as pulse, respiration, and laryngeal movement of humans. Therefore, the lightweight and flexible HPG exhibits excellent EMI shielding performance and mechanical properties, along with its low cost and ease of mass production, which is promising for practical applications in EMI shielding and wearable electronics.
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Affiliation(s)
- Jiandong Xu
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Ruisong Li
- Department of Electrical Engineering and Computer Science and Department of Bioengineering, College of Engineering, University of California, Berkeley, California 94720, United States
| | - Shourui Ji
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Bingchen Zhao
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Tianrui Cui
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Xichao Tan
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Guangyang Gou
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Jinming Jian
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Haokai Xu
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Yancong Qiao
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Yi Yang
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Sheng Zhang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Tian-Ling Ren
- Institute of Microelectronics, Tsinghua University, Beijing 100084, China
- Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
- Center for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
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25
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Zhan Y, Hao X, Wang L, Jiang X, Cheng Y, Wang C, Meng Y, Xia H, Chen Z. Superhydrophobic and Flexible Silver Nanowire-Coated Cellulose Filter Papers with Sputter-Deposited Nickel Nanoparticles for Ultrahigh Electromagnetic Interference Shielding. ACS APPLIED MATERIALS & INTERFACES 2021; 13:14623-14633. [PMID: 33733743 DOI: 10.1021/acsami.1c03692] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Superhydrophobic, flexible, and ultrahigh-performance electromagnetic interference (EMI) shielding papers are of paramount importance to safety and long-term service under external mechanical deformations or other harsh service environments because they fulfill the growing demand for multipurpose materials. Herein, we fabricated multifunctional papers by incorporating sputter-deposited nickel nanoparticles (NiNPs) and a fluorine-containing coating onto cellulose filter papers coated with silver nanowires (AgNWs). AgNW networks with sputter-deposited NiNPs provide outstanding magnetic properties, electrical conductivity, and EMI shielding performance. At an AgNW content of 0.109 vol % and a NiNP content of 0.013 mg/cm2, the resultant papers exhibit a superior EMI shielding effectiveness (SE) of 88.4 dB. Additionally, the fluorine-containing coating endows the resultant papers with a high contact angle of 149.7°. Remarkably, the obtained papers still maintain a high EMI SE even after 1500 bending cycles or immersion in water, salt, or strong alkaline solutions for 2 h, indicating their outstanding mechanical robustness and chemical durability. This work opens a new window for designing and implementing ultrahigh-performance EMI shielding materials.
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Affiliation(s)
- Yanhu Zhan
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
| | - Xuehui Hao
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
| | - Licui Wang
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
| | - Xiancai Jiang
- College of Chemical Engineering, Fuzhou University, Fuzhou 350108, China
| | - Yu Cheng
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Changzheng Wang
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
| | - Yanyan Meng
- School of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China
| | - Zhenming Chen
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
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26
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Choi HK, Lee A, Park M, Lee DS, Bae S, Lee SK, Lee SH, Lee T, Kim TW. Hierarchical Porous Film with Layer-by-Layer Assembly of 2D Copper Nanosheets for Ultimate Electromagnetic Interference Shielding. ACS NANO 2021; 15:829-839. [PMID: 33428397 DOI: 10.1021/acsnano.0c07352] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The emergence of technologies, such as 5G telecommunication, electric vehicles, and wearable electronics, has prompted demand for ultrahigh-performance and cost-effective shielding materials to protect against both the potentially harmful effects of electromagnetic interference (EMI) on human health and electronic device operation. Here, we report hierarchical porous Cu foils via an assembly of single-crystalline, nanometer-thick, and micrometer-long copper nanosheets and their use in EMI shielding. Layer-by-layer assembly of Cu nanosheets enabled the formation of a hierarchically structured porous Cu film with features such as multilayer stacking; two-dimensional networking; and a layered, sheetlike void architecture. The hierarchical-structured porous Cu foil exhibited outstanding EMI shielding performance compared to the same thickness of dense copper and other materials, exhibiting EMI shielding effectiveness (SE) values of 100 and 60.7 dB at thicknesses of 15 and 1.6 μm, respectively. In addition, the EMI SE of the hierarchical porous Cu film was maintained up to 18 months under ambient conditions at room temperature and showed negligible changes after thermal annealing at 200 °C for 1 h. These findings suggest that Cu nanosheets and their layer-by-layer assembly are one of the promising EMI shielding technologies for practical electronic applications.
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Affiliation(s)
- Ho Kwang Choi
- Department of Flexible and Printable Electronics, LANL-CBNU Engineering Institute-Korea, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Aram Lee
- Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeollabuk-do 55324, Republic of Korea
| | - Mina Park
- Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeollabuk-do 55324, Republic of Korea
| | - Dong Su Lee
- Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeollabuk-do 55324, Republic of Korea
| | - Sukang Bae
- Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeollabuk-do 55324, Republic of Korea
| | - Seoung-Ki Lee
- Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeollabuk-do 55324, Republic of Korea
| | - Sang Hyun Lee
- School of Chemical Engineering, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Takhee Lee
- Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University, Seoul 08826, Republic of Korea
| | - Tae-Wook Kim
- Department of Flexible and Printable Electronics, LANL-CBNU Engineering Institute-Korea, Jeonbuk National University, Jeonju 54896, Republic of Korea
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Gopakumar DA, Pai AR, Pottathara YB, Pasquini D, Morais LC, Khalil H.P.S. A, Nzihou A, Thomas S. Flexible papers derived from polypyrrole deposited cellulose nanofibers for enhanced electromagnetic interference shielding in gigahertz frequencies. J Appl Polym Sci 2020. [DOI: 10.1002/app.50262] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Deepu A. Gopakumar
- School of Industrial Technology Universiti Sains Malaysia Penang Malaysia
- Université de Toulouse, IMT Mines Albi Albi France
| | - Avinash R. Pai
- International and Inter University Centre for Nanoscience and Nanotechnology Mahatma Gandhi University Kottayam India
| | | | - Daniel Pasquini
- Chemistry Institute Federal University of Uberlandia‐UFU Uberlândia Brazil
| | | | | | - Ange Nzihou
- Université de Toulouse, IMT Mines Albi Albi France
| | - Sabu Thomas
- International and Inter University Centre for Nanoscience and Nanotechnology Mahatma Gandhi University Kottayam India
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Gu W, Wang G, Zhou M, Zhang T, Ji G. Polyimide-Based Foams: Fabrication and Multifunctional Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:48246-48258. [PMID: 33064943 DOI: 10.1021/acsami.0c15771] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Because of their unique three-dimensional cellular structure and intrinsic properties, polyimide foam materials have bright prospects for development in multiple functional equipment, which arouses extensive concern. In this Spotlight on Applications, several typical fabrication methods of polyimide foams and the related synthesis mechanism have been systematically described. The advantages and disadvantages of the preparation methods have been compared with each other. Representative functions and the corresponding mechanism models have been concluded, which involve thermal, mechanical, sensing, electromagnetic, environmental, and electrical fields. In the end, the severe tasks and challenges of polyimide foam materials have been summarized, and their promising future development is worth expecting.
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Affiliation(s)
- Weihua Gu
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Gehuan Wang
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Ming Zhou
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Tengze Zhang
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
| | - Guangbin Ji
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
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29
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Mei X, Lu L, Xie Y, Yu YX, Tang Y, Teh KS. Preparation of Flexible Carbon Fiber Fabrics with Adjustable Surface Wettability for High-Efficiency Electromagnetic Interference Shielding. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49030-49041. [PMID: 33073568 DOI: 10.1021/acsami.0c08868] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the 5G era, for portable electronics to operate at high performance and low power levels, the incorporation of superior electromagnetic interference (EMI) shielding materials within the packages is of critical importance. A desirable wearable EMI shielding material is one that is lightweight, structurally flexible, air-permeable, and able to self-clean. To this end, a bioinspired electroless silver plating strategy and a one-step electrodeposition method are utilized to prepare an EMI shielding fabric (CEF-NF/PDA/Ag/50-30) that possesses these desirable properties. Porous CEF-NF mats with a spatially distributed silver coating create efficient pathways for electron movement and enable a remarkable conductivity of 370 S mm-1. When tested within a frequency range of 8.2-12.4 GHz, this highly conductive fabric not only achieves an EMI shielding effectiveness (EMI SE of 101.27 dB at 5028 dB cm2 g-1) comparable to a very thin and light metal but also retains the unique properties of fabrics-being light, structurally flexible, and breathable. In addition, it exhibits a high contact angle (CA) of 156.4° with reversible surface wettability. After having been subjected to 1000 cycles of bending, the performance of the fabric only decreases minimally. This strategy potentially provides a novel way to design and manufacture an easily integrated EMI shielding fabric for flexible wearable devices.
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Affiliation(s)
- Xiaokang Mei
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Longsheng Lu
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Yingxi Xie
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Yu-Xiang Yu
- School of Chemistry and Chemical Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Yong Tang
- School of Mechanical & Automotive Engineering, South China University of Technology, 381#Wushan Road, Guangzhou 510641, China
| | - Kwok Siong Teh
- School of Engineering, San Francisco State University, San Francisco, California 94132, United States
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Zeng Z, Li W, Wu N, Zhao S, Lu X. Polymer-Assisted Fabrication of Silver Nanowire Cellular Monoliths: Toward Hydrophobic and Ultraflexible High-Performance Electromagnetic Interference Shielding Materials. ACS APPLIED MATERIALS & INTERFACES 2020; 12:38584-38592. [PMID: 32804478 DOI: 10.1021/acsami.0c10492] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal nanofibers with excellent electrical conductivity and superior mechanical flexibility have great potentials for fabrication of lightweight, flexible, and high-performance electromagnetic interference (EMI) shielding architectures. The weak interactions and large contact resistance among the wires, however, hinder their assembly into robust and high-performance EMI shielding monoliths. In this work, we used low fractions of polymers to assist the construction of lightweight, flexible, and highly conductive silver nanowire (AgNW) cellular monoliths with significantly enhanced mechanical strength and EMI shielding effectiveness (SE). The normalized surface specific SE of our AgNW-based cellular monoliths can reach up to 20522 dB·cm2/g, outracing that of most shielding materials ever reported. Moreover, this robust conductive framework enabled the successful fabrication of hydrophobic, ultraflexible, and highly stretchable aerogel/polymer composites with outstanding EMI SE even at an extremely low AgNW content. Thus, this work demonstrated a facile and efficient strategy for assembling metal nanofiber-based functional high-performance EMI shielding architectures.
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Affiliation(s)
- Zhihui Zeng
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Weiwei Li
- IMPACT Lab, Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Na Wu
- Department of Chemistry, Swiss Federal Institute of Technology in Zurich (ETH Zürich), 8092 Zürich, Switzerland
| | - Shanyu Zhao
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Xuehong Lu
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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Zeng Z, Wang C, Siqueira G, Han D, Huch A, Abdolhosseinzadeh S, Heier J, Nüesch F, Zhang C(J, Nyström G. Nanocellulose-MXene Biomimetic Aerogels with Orientation-Tunable Electromagnetic Interference Shielding Performance. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2000979. [PMID: 32775169 PMCID: PMC7404164 DOI: 10.1002/advs.202000979] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/14/2020] [Indexed: 05/17/2023]
Abstract
Designing lightweight nanostructured aerogels for high-performance electromagnetic interference (EMI) shielding is crucial yet challenging. Ultrathin cellulose nanofibrils (CNFs) are employed for assisting in building ultralow-density, robust, and highly flexible transition metal carbides and nitrides (MXenes) aerogels with oriented biomimetic cell walls. 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. MXene "bricks" bonded by CNF "mortars" of the nacre-like cell walls induce high mechanical strength, electrical conductivity, and interfacial polarization, yielding the resultant MXene/CNF aerogels an ultrahigh EMI shielding performance. The EMI shielding effectiveness (SE) of the aerogels reaches 74.6 or 35.5 dB at a density of merely 8.0 or 1.5 mg cm-3, respectively. The normalized surface specific SE is up to 189 400 dB cm2 g-1, significantly exceeding that of other EMI shielding materials reported so far.
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Affiliation(s)
- Zhihui Zeng
- Laboratory for Cellulose & Wood MaterialsSwiss Federal Laboratories for Materials Science and Technology (Empa)Dübendorf8600Switzerland
| | - Changxian Wang
- School of Materials Science and EngineeringNanyang Technological University50 Nanyang AvenueSingapore639798Singapore
| | - Gilberto Siqueira
- Laboratory for Cellulose & Wood MaterialsSwiss Federal Laboratories for Materials Science and Technology (Empa)Dübendorf8600Switzerland
| | - Daxin Han
- Department of Information Technology and Electrical EngineeringSwiss Federal Institute of Technology in Zurich (ETH Zürich)Zürich8092Switzerland
| | - Anja Huch
- Laboratory for Cellulose & Wood MaterialsSwiss Federal Laboratories for Materials Science and Technology (Empa)Dübendorf8600Switzerland
| | - Sina Abdolhosseinzadeh
- Laboratory for Functional PolymersEmpaDübendorf8600Switzerland
- Institute of Materials Science and EngineeringSwiss Federal Institute of Technology Lausanne (EPFL)Lausanne1015Switzerland
| | - Jakob Heier
- Laboratory for Functional PolymersEmpaDübendorf8600Switzerland
| | - Frank Nüesch
- Laboratory for Functional PolymersEmpaDübendorf8600Switzerland
- Institute of Materials Science and EngineeringSwiss Federal Institute of Technology Lausanne (EPFL)Lausanne1015Switzerland
| | | | - Gustav Nyström
- Laboratory for Cellulose & Wood MaterialsSwiss Federal Laboratories for Materials Science and Technology (Empa)Dübendorf8600Switzerland
- Department of Health Science and TechnologyETH ZürichSchmelzbergstrasse 9Zürich8092Switzerland
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Gu J, Hu S, Ji H, Feng H, Zhao W, Wei J, Li M. Multi-layer silver nanowire/polyethylene terephthalate mesh structure for highly efficient transparent electromagnetic interference shielding. NANOTECHNOLOGY 2020; 31:185303. [PMID: 31958779 DOI: 10.1088/1361-6528/ab6d9d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Electromagnetic interference protection in optoelectronic devices is challenging because of the dual requirements of optical transmittance and high shielding effectiveness (SE). Herein, we propose a novel silver nanowire (AgNW)/polyethylene terephthalate (PET) multi-layer mesh pattern structure for transparent electromagnetic shielding obtained via laser marking and transfer printing. A three-layer composite shielding film with an optical transmittance of 67.8% exhibits a SE of 44 dB at 10 GHz, which is superior to most of the reported transparent shielding films composed of AgNWs to date. The newly designed multi-layer composite structure can enhance the transparent shielding properties of the shielding film via optimization of the AgNW distribution and the shielding film structure. It is expected that this multi-layer mesh composite structure will have splendid application prospects in electromagnetic shielding films, which require both light transmittance and high SE.
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Zeng Z, Jiang F, Yue Y, Han D, Lin L, Zhao S, Zhao YB, Pan Z, Li C, Nyström G, Wang J. Flexible and Ultrathin Waterproof Cellular Membranes Based on High-Conjunction Metal-Wrapped Polymer Nanofibers for Electromagnetic Interference Shielding. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1908496. [PMID: 32227390 DOI: 10.1002/adma.201908496] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 02/26/2020] [Accepted: 03/04/2020] [Indexed: 05/21/2023]
Abstract
Ultrathin, lightweight, and flexible electromagnetic interference (EMI) shielding materials are urgently demanded to address EM radiation pollution. Efficient design to utilize the shields' microstructures is crucial yet remains highly challenging for maximum EMI shielding effectiveness (SE) while minimizing material consumption. Herein, novel cellular membranes are designed based on a facile polydopamine-assisted metal (copper or silver) deposition on electrospun polymer nanofibers. The membranes can efficiently exploit the high-conjunction cellular structures of metal and polymer nanofibers, and their interactions for excellent electrical conductivity, mechanical flexibility, and ultrahigh EMI shielding performance. EMI SE reaches more than 53 dB in an ultra-broadband frequency range at a membrane thickness of merely 2.5 µm and a density of 1.6 g cm-3 , and an SE of 44.7 dB is accomplished at the lowest thickness of 1.2 µm. The normalized specific SE is up to 232 860 dB cm2 g-1 , significantly surpassing that of other shielding materials ever reported. More, integrated functionalities are discovered in the membrane, such as antibacterial, waterproof properties, excellent air permeability, high resistance to mechanical deformations and low-voltage uniform heating performance, offering strong potential for applications in aerospace and portable and wearable smart electronics.
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Affiliation(s)
- Zhihui Zeng
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
| | - Fuze Jiang
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
- ETH Zürich, Stefano-Franscini-Platz 3, Zürich, 8093, Switzerland
| | - Yang Yue
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
- ETH Zürich, Stefano-Franscini-Platz 3, Zürich, 8093, Switzerland
| | - Daxin Han
- Department of Information Technology and Electrical Engineering, ETH Zürich, Stefano-Franscini-Platz 3, Zürich, 8093, Switzerland
| | - Luchan Lin
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
| | - Shanyu Zhao
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
| | - Yi-Bo Zhao
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
- ETH Zürich, Stefano-Franscini-Platz 3, Zürich, 8093, Switzerland
| | - Zhengyuan Pan
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
- ETH Zürich, Stefano-Franscini-Platz 3, Zürich, 8093, Switzerland
- School of Light Industry and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Congju Li
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Gustav Nyström
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
- Department of Health Sciences and Technology, ETH Zürich, Schmelzbergstrasse 9, Zürich, 8092, Switzerland
| | - Jing Wang
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überland Strasse 129, Dübendorf, 8600, Switzerland
- ETH Zürich, Stefano-Franscini-Platz 3, Zürich, 8093, Switzerland
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Wei Q, Pei S, Qian X, Liu H, Liu Z, Zhang W, Zhou T, Zhang Z, Zhang X, Cheng HM, Ren W. Superhigh Electromagnetic Interference Shielding of Ultrathin Aligned Pristine Graphene Nanosheets Film. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1907411. [PMID: 32091164 DOI: 10.1002/adma.201907411] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/31/2020] [Indexed: 05/21/2023]
Abstract
Ultrathin, lightweight, high-strength, and thermally conductive electromagnetic interference (EMI) shielding materials with high shielding effectiveness (SE) are highly desired for next-generation portable and wearable electronics. Pristine graphene (PG) has a great potential to meet all the above requirements, but the poor processability of PG nanosheets hinders its applications. Here, efficient synthesis of highly aligned laminated PG films and nacre-like PG/polymer composites with a superhigh PG loading up to 90 wt% by a scanning centrifugal casting method is reported. Due to the PG-nanosheets-alignment-induced high electrical conductivity and multiple internal reflections, such films show superhigh EMI SE comparable to the reported best synthetic material, MXene films, at an ultralow thickness. An EMI SE of 93 dB is obtained for the PG film at a thickness of ≈100 µm, and 63 dB is achieved for the PG/polyimide composite film at a thickness of ≈60 µm. Furthermore, such PG-nanosheets-based films show much higher mechanical strength (up to 145 MPa) and thermal conductivity (up to 190 W m-1 K-1 ) than those of their MXene counterparts. These excellent comprehensive properties, along with ease of mass production, pave the way for practical applications of PG nanosheets in EMI shielding.
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Affiliation(s)
- Qinwei Wei
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, P. R. China
| | - Songfeng Pei
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
| | - Xitang Qian
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, P. R. China
| | - Haopeng Liu
- Key Laboratory for Anisotropy and Texture of Materials (MOE), School of Materials Science and Engineering, Northeastern University, Shenyang, 100819, P. R. China
| | - Zhibo Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
| | - Weimin Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, P. R. China
| | - Tianya Zhou
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, P. R. China
| | - Zhangcai Zhang
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
- Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123, P. R. China
| | - Xuefeng Zhang
- Key Laboratory for Anisotropy and Texture of Materials (MOE), School of Materials Science and Engineering, Northeastern University, Shenyang, 100819, P. R. China
| | - Hui-Ming Cheng
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, P. R. China
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, P. R. China
| | - Wencai Ren
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P. R. China
- School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, P. R. China
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Zeng Z, Wu T, Han D, Ren Q, Siqueira G, Nyström G. Ultralight, Flexible, and Biomimetic Nanocellulose/Silver Nanowire Aerogels for Electromagnetic Interference Shielding. ACS NANO 2020; 14:2927-2938. [PMID: 32109050 DOI: 10.1021/acsnano.9b07452] [Citation(s) in RCA: 91] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Ultralight and highly flexible biopolymer aerogels, composed of biomimetic cellular microstructures formed from cellulose nanofibers and silver nanowires, are assembled via a convenient and facile freeze-casting method. The lamellar, honeycomb-like, and random porous scaffolds are successfully achieved by adjusting freezing approaches to modulate the relationships between microstructures and macroscopic mechanical and electromagnetic interference (EMI) shielding performances. Combining the shielding transformation arising from in situ compression and the controlled content of building units, the optimized lamellar porous biopolymer aerogels can show a very high EMI shielding effectiveness (SE), which exceeds 70 or 40 dB in the X-band while the density is merely 6.2 or 1.7 mg/cm3, respectively. The corresponding normalized surface specific SE (defined as the SE divided by the material density and thickness) is up to 178235 dB·cm2/g, far surpassing that of the so-far reported shielding materials. Antibacterial properties and hydrophobicity are also demonstrated extending the versatility and application potential of the biopolymer hybrid aerogels.
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Affiliation(s)
- Zhihui Zeng
- Laboratory for Cellulose & Wood Materials, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland
| | - Tingting Wu
- Laboratory for Cellulose & Wood Materials, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland
| | - Daxin Han
- Department of Information Technology and Electrical Engineering, Swiss Federal Institute of Technology in Zurich (ETH Zürich), 8092 Zürich, Switzerland
| | - Qun Ren
- Laboratory for Biointerfaces, Swiss Federal Laboratories for Materials Science and Technology (Empa), 9041 St. Gallen, Switzerland
| | - Gilberto Siqueira
- Laboratory for Cellulose & Wood Materials, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland
| | - Gustav Nyström
- Laboratory for Cellulose & Wood Materials, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland
- Department of Health Sciences and Technology, ETH Zürich, 8092 Zürich, Switzerland
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37
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Wang YY, Zhou ZH, Zhou CG, Sun WJ, Gao JF, Dai K, Yan DX, Li ZM. Lightweight and Robust Carbon Nanotube/Polyimide Foam for Efficient and Heat-Resistant Electromagnetic Interference Shielding and Microwave Absorption. ACS APPLIED MATERIALS & INTERFACES 2020; 12:8704-8712. [PMID: 31971778 DOI: 10.1021/acsami.9b21048] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Excellent electromagnetic interference (EMI) shielding ability, light weight, and good heat resistance are highly required for practical applications of EMI shielding materials, such as in areas of aerospace, aircraft, and automobiles. Herein, a lightweight and robust carbon nanotube (CNT)/polyimide (PI) foam was developed for efficient and heat-resistant EMI shielding. Thanks to poly(vinyl pyrrolidone) (PVP) as a surfactant that not only promotes the uniform dispersion of CNTs to form perfect CNT conductive networks but also can be removed in situ during the polymerization process, the density of resultant CNT/PI foam is only 32.1 mg·cm-3, and the EMI shielding effectiveness (EMI SE) is up to 41.1 dB, which represents one of the highest EMI SE values compared to previously reported polymer-based foams. The CNT/PI foam also achieves the absorption coefficient (A) of up to 82.3%, which is very impressive in CNT/polymer foams at comparable EMI SE levels. The PI matrix endows the foam with excellent heat resistance. The as-prepared CNT/PI foam presents a higher EMI SE than 35 dB even after being subjected to the flame of an alcohol burner. Moreover, the compressive strength and compressive modulus are up to 240.9 and 323.9 kPa. These results indicate its certain application potential in the harsh requirement of aeronautics and aerospace industries as a highly efficient and lightweight EMI shielding material.
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Affiliation(s)
- Yue-Yi Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , China
| | - Zi-Han Zhou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , China
| | - Chang-Ge Zhou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , China
| | - Wen-Jin Sun
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , China
| | - Jie-Feng Gao
- College of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou 225009 , China
| | - Kun Dai
- School of Materials Science and Engineering , Zhengzhou University , Zhengzhou 450001 , China
| | - Ding-Xiang Yan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , China
- School of Aeronautics and Astronautics , Sichuan University , Chengdu 610065 , China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , China
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Shayesteh Zeraati A, Sundararaj U. Carbon nanotube/ZnO nanowire/polyvinylidene fluoride hybrid nanocomposites for enhanced electromagnetic interference shielding. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23717] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ali Shayesteh Zeraati
- Department of Chemical and Petroleum Engineering University of Calgary Calgary Alberta Canada
| | - Uttandaraman Sundararaj
- Department of Chemical and Petroleum Engineering University of Calgary Calgary Alberta Canada
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Wang H, Zhang Y, Ji C, Zhang C, Liu D, Zhang Z, Lu Z, Tan J, Guo LJ. Transparent Perfect Microwave Absorber Employing Asymmetric Resonance Cavity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1901320. [PMID: 31592425 PMCID: PMC6774038 DOI: 10.1002/advs.201901320] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/03/2019] [Indexed: 05/27/2023]
Abstract
The demand for high-performance absorbers in the microwave frequencies, which can reduce undesirable radiation that interferes with electronic system operation, has attracted increasing interest in recent years. However, most devices implemented so far are opaque, limiting their use in optical applications that require high visible transparency. Here, a scheme is demonstrated for microwave absorbers featuring high transparency in the visible range, near-unity absorption (≈99.5% absorption at 13.75 GHz with 3.6 GHz effective bandwidth) in the Ku-band, and hence excellent electromagnetic interference shielding performance (≈26 dB). The device is based on an asymmetric Fabry-Pérot cavity, which incorporates a monolayer graphene and a transparent ultrathin (8 nm) doped silver layer as absorber and reflector, and fused silica as the middle dielectric layer. Guided by derived formulism, this asymmetric cavity is demonstrated with microwaves near-perfectly and exclusively absorbs in the ultrathin graphene film. The peak absorption frequency of the cavity can be readily tuned by simply changing the thickness of the dielectric spacer. The approach provides a viable solution for a new type of microwave absorber with high visible transmittance, paving the way towards applications in the area of optics.
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Affiliation(s)
- Heyan Wang
- Ultra‐precision Optical & Electronic Instrument Engineering CenterHarbin Institute of TechnologyHarbin150001China
- Key Lab of Ultra‐precision Intelligent Instrumentation (Harbin Institute of Technology)Ministry of Industry and Information TechnologyHarbin150080China
- Department of Electrical Engineering and Computer ScienceUniversity of MichiganAnn ArborMI48109USA
| | - Yilei Zhang
- Ultra‐precision Optical & Electronic Instrument Engineering CenterHarbin Institute of TechnologyHarbin150001China
- Key Lab of Ultra‐precision Intelligent Instrumentation (Harbin Institute of Technology)Ministry of Industry and Information TechnologyHarbin150080China
| | - Chengang Ji
- Department of Electrical Engineering and Computer ScienceUniversity of MichiganAnn ArborMI48109USA
| | - Cheng Zhang
- Department of Electrical Engineering and Computer ScienceUniversity of MichiganAnn ArborMI48109USA
| | - Dong Liu
- MIIT Key Laboratory of Thermal Control of Electronic EquipmentSchool of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing210094China
| | - Zhong Zhang
- Department of Electrical Engineering and Computer ScienceUniversity of MichiganAnn ArborMI48109USA
| | - Zhengang Lu
- Ultra‐precision Optical & Electronic Instrument Engineering CenterHarbin Institute of TechnologyHarbin150001China
- Key Lab of Ultra‐precision Intelligent Instrumentation (Harbin Institute of Technology)Ministry of Industry and Information TechnologyHarbin150080China
| | - Jiubin Tan
- Ultra‐precision Optical & Electronic Instrument Engineering CenterHarbin Institute of TechnologyHarbin150001China
- Key Lab of Ultra‐precision Intelligent Instrumentation (Harbin Institute of Technology)Ministry of Industry and Information TechnologyHarbin150080China
| | - L. Jay Guo
- Department of Electrical Engineering and Computer ScienceUniversity of MichiganAnn ArborMI48109USA
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41
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Ren F, Guo H, Guo ZZ, Jin YL, Duan HJ, Ren PG, Yan DX. Highly Bendable and Durable Waterproof Paper for Ultra-High Electromagnetic Interference Shielding. Polymers (Basel) 2019; 11:E1486. [PMID: 31547358 PMCID: PMC6780577 DOI: 10.3390/polym11091486] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/02/2019] [Accepted: 09/09/2019] [Indexed: 11/16/2022] Open
Abstract
An efficient electromagnetic interference (EMI) shielding paper with excellent water repellency and mechanical flexibility has been developed, by assembling silver nanowires (AgNWs) and hydrophobic inorganic ceramic on the cellulose paper, via a facile dip-coating preparation. Scanning electron microscope (SEM) observations confirmed that AgNWs were interconnected and densely coated on both sides of the cellulose fiber, which endows the as-prepared paper with high conductivity (33.69 S/cm in-plane direction) at a low AgNW area density of 0.13 mg/cm2. Owing to multiple reflections and scattering between the two outer highly conductive surfaces, the obtained composite presented a high EMI shielding effectiveness (EMI SE) of up to 46 dB against the X band, and ultrahigh specific EMI SE of 271.2 dB mm-1. Moreover, the prepared hydrophobic AgNW/cellulose (H-AgNW/cellulose) composite paper could also maintain high EMI SE and extraordinary waterproofness (water contact angle > 140°) by suffering dozens of bending tests or one thousand peeling tests. Overall, such a multifunctional paper might have practical applications in packaging conductive components and can be used as EMI shielding elements in advanced application areas, even under harsh conditions.
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Affiliation(s)
- Fang Ren
- The Faculty of Printing and Packaging Engineering, Xi'an University of Technology, Xi'an 710048, China
| | - Han Guo
- The Faculty of Printing and Packaging Engineering, Xi'an University of Technology, Xi'an 710048, China
| | - Zheng-Zheng Guo
- The Faculty of Printing and Packaging Engineering, Xi'an University of Technology, Xi'an 710048, China
| | - Yan-Ling Jin
- The Faculty of Printing and Packaging Engineering, Xi'an University of Technology, Xi'an 710048, China
| | - Hong-Ji Duan
- Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China
| | - Peng-Gang Ren
- The Faculty of Printing and Packaging Engineering, Xi'an University of Technology, Xi'an 710048, China.
- Shanxi Province Key Laboratory of Functional Nanocomposites, North University of China, Taiyuan 030051, China.
| | - Ding-Xiang Yan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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Zhang H, Zhang J. Lightweight silver@carbon microsphere@graphene (Ag@CMS@GR) composite materials for highly efficiency electromagnetic interference shielding properties. J Appl Polym Sci 2019. [DOI: 10.1002/app.48459] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Han Zhang
- The State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu 610065 China
| | - Junhua Zhang
- The State Key Laboratory of Polymer Materials EngineeringPolymer Research Institute of Sichuan University Chengdu 610065 China
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Jiang ZY, Huang W, Chen LS, Liu YH. Ultrathin, lightweight, and freestanding metallic mesh for transparent electromagnetic interference shielding. OPTICS EXPRESS 2019; 27:24194-24206. [PMID: 31510313 DOI: 10.1364/oe.27.024194] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/31/2019] [Indexed: 06/10/2023]
Abstract
A unique freestanding nickel (Ni) metallic mesh-based electromagnetic interference shielding film has been fabricated though the direct-writing technique and a subsequent selective metal electrodeposited process. The structured freestanding Ni mesh film demonstrates a series of advantages, including ultrathin thickness (2.5-6.0 μm) and ultralight weight (0.23 mg cm-2), extraordinary optoelectronic performance (sheet resistance about 0.24-0.7 Ω sq-1 with transparency of 92%-93%), high figure of merit (18000) and outstanding flexibility as it can withstand folding, rolling and crumpling into various shapes while keeping the conductivity constant. Furthermore, by using this high-performance Ni mesh, an ultrathin, lightweight, freestanding and transparent electromagnetic interference shielding (EMI) film with extraordinary optoelectronic properties (shielding effectiveness about 40 dB with transparency of 92%) is demonstrated in X-band, with no performance attenuation observed even in bending state. This freestanding metallic mesh-structured electrode can be further explored or applied in various potential applications, such as conformal microwave antennas, transparent EMI windows, and wearable electronics.
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Nguyen VH, Resende J, Papanastasiou DT, Fontanals N, Jiménez C, Muñoz-Rojas D, Bellet D. Low-cost fabrication of flexible transparent electrodes based on Al doped ZnO and silver nanowire nanocomposites: impact of the network density. NANOSCALE 2019; 11:12097-12107. [PMID: 31184671 DOI: 10.1039/c9nr02664a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We report the study of nanocomposite transparent electrodes based on aluminium doped zinc oxide (ZnO : Al) thin films and silver nanowire (AgNW) networks. The electrodes are fully fabricated by low-cost, open-air techniques, namely, atmospheric pressure spatial atomic layer deposition and spray coating. We show that the transparency and the electrical conductivity of the ZnO : Al/AgNW nanocomposites can be tuned by controlling the AgNW network density. We also demonstrate that the thermal, electrical and mechanical stabilities of the nanocomposites are drastically enhanced compared to those of AgNW networks or ZnO : Al thin films separately. Interestingly, we report a clear continuous decrease of the electrical resistance of the nanocomposites for network densities even below the percolation threshold. We propose a model to explain the relationship between the conductivity of the nanocomposites and the AgNW network density. Our physical model is based on the non-negligible contribution of percolating clusters of AgNWs for network densities below the percolation threshold. Our results provide a means to predicting the physical properties of such nanocomposites for applications in solar cells and other optoelectronic devices. Finally, the deposition methods used open the way towards stable, low-cost and flexible transparent electrodes for industrial applications.
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Affiliation(s)
- Viet Huong Nguyen
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France.
| | - Joao Resende
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France.
| | | | - Nil Fontanals
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France.
| | - Carmen Jiménez
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France.
| | - David Muñoz-Rojas
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France.
| | - Daniel Bellet
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France.
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Marka SK, Srikanth VVSS, Sindam B, Hazra BK, Raju KCJ, Srinath S. Graphene-Wrapped MgO/Poly(vinyl alcohol) Composite Sheets: Dielectric and Electromagnetic Interference Shielding Properties at Elevated Temperatures. ACS APPLIED MATERIALS & INTERFACES 2019; 11:23714-23730. [PMID: 31252471 DOI: 10.1021/acsami.9b05137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Different amounts of graphene-wrapped magnesium oxide (G@MgO) powders are uniformly dispersed in poly(vinyl alcohol) (PVA) solution in different experiments to obtain solutions which are coagulated to obtain solid materials, which are then hot pressed at 413 K and 3 t of pressure to finally obtain 1 mm thick freestanding G@MgO/PVA composite sheets in which the constituents, namely, graphene and MgO (in the form of G@MgO), are the nanofillers in PVA matrix. During synthesis of G@MgO powder, MgO nanoparticles are in situ wrapped by the graphene nanosheets as revealed by electron microscopy. Uniformity of G@MgO dispersion in PVA was confirmed by secondary electron micrographs and the consistency in X-ray diffraction and Raman scattering data collected from different locations of the samples. Temperature (303-393 K) dependent complex permittivity of G@MgO/PVA composite sheets (including those prepared by casting) in low frequency (20 Hz to 2 MHz) and high frequency (i.e., X-band, 8.2-12.4 GHz) ranges are measured. In both frequency ranges, G@MgO/PVA composite sheets prepared by coagulation exhibited dielectric properties superior to those of PVA and G@MgO/PVA composite sheets prepared by casting. A strong interfacial polarization is observed in coagulated and as-cast G@MgO/PVA composite sheets. It is noticed from the calculated activation energies that conduction is the dominating mechanism for energy transfer in both composite sheets' cases, while it is predominating in coagulated composite sheets due to the better network formation of the fillers in the coagulated samples than in the cast composite samples. The electromagnetic interference shielding effectiveness (EMI SE) values in the X-band frequency range (i.e., 8.2-12.4 GHz) of the G@MgO/PVA composite sheets prepared by coagulation are more than those prepared by casting for a particular weight fraction of G@MgO. At 393 K, for a particular G@MgO/PVA composite sheet prepared by coagulation, an excellent EMI SE of ∼27.5 dB is measured. It is also experimentally elucidated that the absorption is the dominating mechanism for EMI SE in the prepared composite sheets.
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Affiliation(s)
- Sandeep Kumar Marka
- School of Engineering Sciences and Technology (SEST) , University of Hyderabad , Gachibowli, Hyderabad 500046 , India
| | - Vadali V S S Srikanth
- School of Engineering Sciences and Technology (SEST) , University of Hyderabad , Gachibowli, Hyderabad 500046 , India
| | - Bashaiah Sindam
- Advanced Centre of Research in High Energy Materials, School of Physics , University of Hyderabad , Gachibowli, Hyderabad 500046 , India
- School of Physics , University of Hyderabad , Gachibowli, Hyderabad 500046 , India
| | - Binoy Krishna Hazra
- School of Physics , University of Hyderabad , Gachibowli, Hyderabad 500046 , India
| | - K C James Raju
- School of Physics , University of Hyderabad , Gachibowli, Hyderabad 500046 , India
| | - S Srinath
- School of Physics , University of Hyderabad , Gachibowli, Hyderabad 500046 , India
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46
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Maheshwari N, Abd-Ellah M, Goldthorpe IA. Transfer printing of silver nanowire conductive ink for e-textile applications. FLEXIBLE AND PRINTED ELECTRONICS 2019; 4:025005. [DOI: 10.1088/2058-8585/ab2543] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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47
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Kumar P, Narayan Maiti U, Sikdar A, Kumar Das T, Kumar A, Sudarsan V. Recent Advances in Polymer and Polymer Composites for Electromagnetic Interference Shielding: Review and Future Prospects. POLYM REV 2019. [DOI: 10.1080/15583724.2019.1625058] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Pradip Kumar
- Department of Physics, Central University of Rajasthan, NH-8 Bandersindri, Kishangarh, Ajmer, Rajasthan, India
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - Uday Narayan Maiti
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, India
| | - Anirban Sikdar
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, India
| | - Tapas Kumar Das
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - Asheesh Kumar
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
| | - V Sudarsan
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India
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48
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Pitkänen O, Tolvanen J, Szenti I, Kukovecz Á, Hannu J, Jantunen H, Kordas K. Lightweight Hierarchical Carbon Nanocomposites with Highly Efficient and Tunable Electromagnetic Interference Shielding Properties. ACS APPLIED MATERIALS & INTERFACES 2019; 11:19331-19338. [PMID: 31059215 PMCID: PMC6750641 DOI: 10.1021/acsami.9b02309] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 05/06/2019] [Indexed: 05/20/2023]
Abstract
High-performance electromagnetic interference shielding is becoming vital for the next generation of telecommunication and sensor devices among which portable and wearable applications require highly flexible and lightweight materials having efficient absorption-dominant shielding. Herein, we report on lightweight carbon foam-carbon nanotube/carbon nanofiber nanocomposites that are synthesized in a two-step robust process including a simple carbonization of open-pore structure melamine foams and subsequent growth of carbon nanotubes/nanofibers by chemical vapor deposition. The microstructure of the nanocomposites resembles a 3-dimensional hierarchical network of carbonaceous skeleton surrounded with a tangled web of bamboo-shaped carbon nanotubes and layered graphitic carbon nanofibers. The microstructure of the porous composite enables absorption-dominant (absorbance ∼0.9) electromagnetic interference shielding with an effectiveness of ∼20-30 dB and with an equivalent mass density normalized shielding effectiveness of ∼800-1700 dB cm3 g-1 at the K-band frequency (18-26.5 GHz). Moreover, the hydrophobic nature of the materials grants water-repellency and stability in humid conditions important for reliable operation in outdoor use, whereas the mechanical flexibility and durability with excellent piezoresistive behavior enable strain-responsive tuning of electrical conductivity and electromagnetic interference shielding, adding on further functionalities. The demonstrated nanocomposites are versatile and will contribute to the development of reliable devices not only in telecommunication but also in wearable electronics, aerospace engineering, and robotics among others.
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Affiliation(s)
- Olli Pitkänen
- Microelectronics Research Unit, Faculty of Information Technology
and Electrical Engineering, University of
Oulu, P.O. Box 4500, FIN-90014 Oulu, Finland
- E-mail:
| | - Jarkko Tolvanen
- Microelectronics Research Unit, Faculty of Information Technology
and Electrical Engineering, University of
Oulu, P.O. Box 4500, FIN-90014 Oulu, Finland
| | - Imre Szenti
- Interdisciplinary Excellence Centre, Department of Applied and Environmental
Chemistry, University of Szeged, H-6720 Szeged, Rerrich Béla tér 1, Hungary
| | - Ákos Kukovecz
- Interdisciplinary Excellence Centre, Department of Applied and Environmental
Chemistry, University of Szeged, H-6720 Szeged, Rerrich Béla tér 1, Hungary
| | - Jari Hannu
- Microelectronics Research Unit, Faculty of Information Technology
and Electrical Engineering, University of
Oulu, P.O. Box 4500, FIN-90014 Oulu, Finland
| | - Heli Jantunen
- Microelectronics Research Unit, Faculty of Information Technology
and Electrical Engineering, University of
Oulu, P.O. Box 4500, FIN-90014 Oulu, Finland
| | - Krisztian Kordas
- Microelectronics Research Unit, Faculty of Information Technology
and Electrical Engineering, University of
Oulu, P.O. Box 4500, FIN-90014 Oulu, Finland
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49
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Zhang N, Wang Z, Song R, Wang Q, Chen H, Zhang B, Lv H, Wu Z, He D. Flexible and transparent graphene/silver-nanowires composite film for high electromagnetic interference shielding effectiveness. Sci Bull (Beijing) 2019; 64:540-546. [PMID: 36659744 DOI: 10.1016/j.scib.2019.03.028] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/27/2019] [Accepted: 03/04/2019] [Indexed: 01/21/2023]
Abstract
Herein, an efficient approach to prepare flexible, transparent, and lightweight films based on graphene nanosheets (GNS) and silver nanowires (AgNWs) for high electromagnetic interference (EMI) shielding effectiveness (SE) has been explained. High-conductive GNS were fabricated by liquid phase stripping and composited with AgNWs by a two-step spin-coating method. Owing to the high transparency, good conductivity, and homogeneous distribution of both GNS and AgNWs, the obtained GNS/AgNWs film exhibits superb EMI SE and light transmittance, yielding a significantly high EMI SE up to 26 dB in both Ku-band and K-band and light transmittance higher than 78.4%. Moreover, this GNS/AgNWs film shows good flexibility and excellent structural stability. The obtained flexible, light and transparent film could have a great potential for transparent EMI shielding and smart electronics.
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Affiliation(s)
- Ning Zhang
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Zhe Wang
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Rongguo Song
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Qianlong Wang
- Shenzhen Institute of Advanced Graphene Application and Technology (SIAGAT), Shenzhen 518106, China
| | - Hongye Chen
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Bin Zhang
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Haifei Lv
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Zhi Wu
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China
| | - Daping He
- Hubei Engineering Research Center of RF-Microwave Technology and Application, School of Science, Wuhan University of Technology, Wuhan 430070, China.
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50
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Huang L, Li J, Li Y, He X, Yuan Y. Lightweight and flexible hybrid film based on delicate design of electrospun nanofibers for high-performance electromagnetic interference shielding. NANOSCALE 2019; 11:8616-8625. [PMID: 30994685 DOI: 10.1039/c9nr02102g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
High-performance electromagnetic interference (EMI) shielding materials possess features of light weight, flexibility and excellent EMI shielding effectiveness. However, continuous efforts are still needed to satisfy the urgent demand for electromagnetic pollution shielding. In this study, a lightweight and flexible hybrid film with a multi-scale double-continuous conductive network (TiO2/SiO2@PPy) and sandwich structure (TiO2/SiO2@PPy@rGO) was prepared via a delicate structure design of electrospun TiO2/SiO2 nanofibers. The hybrid film worked as an effective dissipative medium, leading to a high EMI shielding effectiveness of approximately 30 dB in the X band (8-12 GHz) and excellent specific EMI shielding effectiveness (SE) of ∼13 829 dB cm2 g-1. The hybrid film has a tensile strength of 2.71 MPa, while its density is only 0.089 g cm-3. The hybrid films maintained good electrical and EMI shielding properties after repeated bending, indicating their favorable flexibility. The delicate structure-design strategy of the electrospun nanofibers presents a practicable way to prepare lightweight and flexible hybrid films for high-performance EMI shielding materials in flexible electronics, military and healthcare applications.
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Affiliation(s)
- Li Huang
- School of Materials Science and Technology, Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin, 300401, People's Republic of China.
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