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Anju, Masař M, Machovský M, Urbánek M, Šuly P, Hanulíková B, Vilčáková J, Kuřitka I, Yadav RS. Optimization of CoFe 2O 4 nanoparticles and graphite fillers to endow thermoplastic polyurethane nanocomposites with superior electromagnetic interference shielding performance. NANOSCALE ADVANCES 2024; 6:2149-2165. [PMID: 38633039 PMCID: PMC11019480 DOI: 10.1039/d3na01053h] [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: 11/27/2023] [Accepted: 03/05/2024] [Indexed: 04/19/2024]
Abstract
The rapid growth, integration, and miniaturization of electronics have raised significant concerns about how to handle issues with electromagnetic interference (EMI), which has increased demand for the creation of EMI shielding materials. In order to effectively shield against electromagnetic interference (EMI), this study developed a variety of thermoplastic polyurethane (TPU)-based nanocomposites in conjunction with CoFe2O4 nanoparticles and graphite. The filler percentage and nanocomposite thickness were tuned and optimized. The designed GF15-TPU nanocomposite, which has a 5 mm thickness, 15 weight percent cobalt ferrite nanoparticles, and 35 weight percent graphite, showed the highest total EMI shielding effectiveness value of 41.5 dB in the 8.2-12.4 GHz frequency range, or 99.993% shielding efficiency, out of all the prepared polymer nanocomposites. According to experimental findings, the nanocomposite's dipole polarization, interfacial polarization, conduction loss, eddy current loss, natural resonance, exchange resonance, multiple scattering, and high attenuation significantly contribute to improving its electromagnetic interference shielding properties. The created TPU-based nanocomposites containing graphite and CoFe2O4 nanoparticles have the potential to be used in communication systems, defense, spacecraft, and aircraft as EMI shielding materials.
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Affiliation(s)
- Anju
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
| | - Milan Masař
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
| | - Michal Machovský
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
| | - Michal Urbánek
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
| | - Pavol Šuly
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
| | - Barbora Hanulíková
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
| | - Jarmila Vilčáková
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
| | - Ivo Kuřitka
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
- Department of Chemistry, Faculty of Technology, Tomas Bata University in Zlín Vavrečkova 5669 760 01 Zlín Czech Republic
| | - Raghvendra Singh Yadav
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín Trida Tomase Bati 5678 760 01 Zlín Czech Republic
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2
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Kazmi SJ, Rehman SU, Nadeem M, Rehman UU, Hussain S, Manzoor S. Effect of carbon allotropes and thickness variation on the EMI shielding properties of PANI/NFO@CNTs and PANI/NFO@RGO ternary composite systems. Phys Chem Chem Phys 2024; 26:10168-10182. [PMID: 38495023 DOI: 10.1039/d4cp00028e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The innovative design of thin, multiphase flexible composite systems with good mechanical properties, low density and improved EMI shielding properties at low filler content has become a key area of research. In this work, we report the low temperature synthesis of three-dimensional ternary composites (PANI/NFO@CNTs and PANI/NFO@RGO) by oxidative chemical polymerization of aniline in the presence of two different binary composites, viz. NFO@CNTs and NFO@RGO. Enhanced impedance matching is achieved by varying the ratio of the carbon allotropes (CNTs and RGO) to the ferrite component. The synthesis of NFO, PANI/NFO@CNTs and PANI/NFO@RGO is validated by XRD and FTIR spectroscopy. Field emission scanning electron microscopy (FE-SEM) confirmed the synthesis of core-shell structures of PANI/NFO@CNTs and PANI/NFO@RGO, where the binary composites (NFO@CNTs and NFO@RGO) serve as a core onto which a tubular PANI layer was coated. Shielding effectiveness of 22.36 dB (99.41% attenuation) is exhibited by the ternary composite PANI/NFO@CNTs (8 : 1), while for PANI/NFO@RGO (20 : 1) a total shielding effectiveness of 31 dB equivalent to 99.92% attenuation was observed at a thickness of 2 mm. The ternary composite PANI/NFO@RGO (20 : 1) 4 mm showed a maximum SET of 43 dB corresponding to 99.996% attenuation of incident EM waves. The enhanced EMI shielding properties of the synthesized ternary composite systems are accredited to good impedance matching, effective dielectric and magnetic loss mechanisms and good conductivity, which facilitate multiple reflections and scattering of incident radiation.
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Affiliation(s)
- Syeda Javaria Kazmi
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
| | - Saeed Ur Rehman
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
| | - M Nadeem
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, Islamabad, Pakistan
| | - Ubaid Ur Rehman
- Polymer Composite Group, Physics Division, Directorate of Science, PINSTECH, P.O. Nilore, Islamabad, Pakistan
| | - Shahzad Hussain
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
| | - Sadia Manzoor
- Magnetism Laboratory, Department of Physics, COMSATS University, 45550 Islamabad, Pakistan.
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3
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Waseem M, Xie Y, Yu K, Zhou X, Cai Y, Zhang X, Liu B, Chen J. Lightweight ZnO/Carbonated Cotton Fiber Nanocomposites for Electromagnetic Interference Applications: Preparation and Properties. Polymers (Basel) 2023; 16:116. [PMID: 38201781 PMCID: PMC10780855 DOI: 10.3390/polym16010116] [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: 12/05/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
Electromagnetic wave pollution has become a significant harm posed to human health and precision instruments. To shelter such instruments from electromagnetic radiation, high-frequency electromagnetic interference (EMI) shielding materials are extremely desirable. The focus of this research is lightweight, high-absorption EMI shielding composites. Simple aqueous dispersion and drying procedures were used to prepare cotton fiber (CF)-based sheets combined with various zinc oxide (ZnO) contents. These composites were carbonated in a high-temperature furnace at 800 °C for two hours. The obtained CF/ZnO samples have densities of 1.02-1.08 g/cm3. The EMI shielding effectiveness of CF-30% ZnO, CF-50% ZnO, and CF-70% ZnO reached 32.06, 38.08, and 34.69 dB, respectively, to which more than 80% of absorption is attributed. The synergetic effects of carbon networks and surface structures are responsible for the high EMI shielding performance; various reflections inside the interconnected networks may also help in improving their EMI shielding performance.
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Affiliation(s)
- Muhammad Waseem
- School of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, China; (M.W.)
| | - Yuxiang Xie
- School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China
| | - Kesong Yu
- School of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, China; (M.W.)
| | - Xiling Zhou
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing, South China University of Technology, Guangzhou 510610, China
| | - Yingchun Cai
- School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China
| | - Xiaoli Zhang
- School of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, China; (M.W.)
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing, South China University of Technology, Guangzhou 510610, China
| | - Baochen Liu
- School of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, China; (M.W.)
| | - Jingbo Chen
- School of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450001, China; (M.W.)
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Bai X, He L, Zhang W, Lv F, Zheng Y, Kong X, Wang D, Zhao Y. Bi 2MoO 6 Embedded in 3D Porous N,O-Doped Carbon Nanosheets for Photocatalytic CO 2 Reduction. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13091569. [PMID: 37177113 PMCID: PMC10181000 DOI: 10.3390/nano13091569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/26/2023] [Accepted: 05/05/2023] [Indexed: 05/15/2023]
Abstract
Artificial photosynthesis is promising to convert solar energy and CO2 into valuable chemicals, and to alleviate the problems of the greenhouse effect and the climate change crisis. Here, we fabricated a novel photocatalyst by directly growing Bi2MoO6 nanosheets on three-dimensional (3D) N,O-doped carbon (NO-C). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) show that the designed photocatalyst ensured the close contact between Bi2MoO6 and NO-C, and reduced the stacking of the NO-C layers to provide abundant channels for the diffusion of CO2, while NO-C can allow for fast electron transfer. The charge transfer in this composite was determined to follow a step-scheme mechanism, which not only facilitates the separation of charge carriers but also retains a strong redox capability. Benefiting from this unique 3D structure and the synergistic effect, BMO/NO-C showed excellent performance in photocatalytic CO2 reductions. The yields of the best BMO/NO-C catalysts for CH4 and CO were 9.14 and 14.49 μmol g-1 h-1, respectively. This work provides new insights into constructing step-scheme photocatalytic systems with the 3D nanostructures.
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Affiliation(s)
- Xue Bai
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Lang He
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Wenyuan Zhang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Fei Lv
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Yayun Zheng
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Xirui Kong
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Du Wang
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Yan Zhao
- The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
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5
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Shi Y, Yao A, Han J, Wang H, Feng Y, Fu L, Yang F, Song P. Architecting fire safe hierarchical polymer nanocomposite films with excellent electromagnetic interference shielding via interface engineering. J Colloid Interface Sci 2023; 640:179-191. [PMID: 36848771 DOI: 10.1016/j.jcis.2023.02.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/10/2023] [Accepted: 02/15/2023] [Indexed: 02/27/2023]
Abstract
Integrating high flame retardancy and excellent electromagnetic interference (EMI) shielding into polymetric materials is extremely necessary, and well dispersing conductive fillers into polymeric materials is still a great challenge because of incompatible interfacial polarity between polymer matrix and conductive fillers. Therefore, under the premise of maintaining integral conductive films in the process of hot compression, constructing a novel EMI shielding polymer nanocomposites where conductive films closely adhere to polymer nanocmposites layers should be a fascinating stratety. In this work, salicylaldehyde-modified chitosan decorated titanium carbide nanohybrid (Ti3C2Tx-SCS) was combined with piperazine-modified ammonium polyphosphate (PA-APP) to fabricate thermoplastic polyurethane (TPU) nanocomposites, which were used for construction of hierarchical nanocomposite films by inserting reduced graphene oxide (rGO) films into TPU/PA-APP/Ti3C2Tx-SCS nanocomposite layers through our self-developed air assisted hot pressing technique. The total heat release, total smoke release and total carbon monoxide yield for TPU nanocomposite containing 4.0 wt% Ti3C2Tx-SCS nanohybrid were 58.0%, 58.4% and 75.8% lower than those of pristine TPU, respectively. Besides, the hierarchical TPU nanocomposite film containing 1.0 wt% Ti3C2Tx-SCS presented an averaged EMI shielding effectiveness of 21.3 dB in X band. This work provides a promising strategy for fabricating fire safe and EMI shielding polymer nanocomposites.
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Affiliation(s)
- Yongqian Shi
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China.
| | - Ansheng Yao
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China
| | - Junqiang Han
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China
| | - Hengrui Wang
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China
| | - Yuezhan Feng
- Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, PR China
| | - Libi Fu
- College of Civil Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China
| | - Fuqiang Yang
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, PR China
| | - Pingan Song
- Centre for Future Materials, University of Southern Queensland, Springfield, QLD 4350, Australia.
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6
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Mastropasqua C, Veca A, Damin A, Brunella V, Cesano F. Functional Piezoresistive Polymer Composites Based on CO 2 Laser-Irradiated Graphene Oxide-Loaded Polyurethane: Morphology, Structure, Electrical and Piezoresistive Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 13:168. [PMID: 36616078 PMCID: PMC9824016 DOI: 10.3390/nano13010168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Nanocomposite materials have recently attracted great attention for their wide range of applications, such as in smart materials, flexible electronics, and deformation sensing applications. Such materials make it possible to combine a polymer with functional fillers. In this study, flexible artificial leathers, exhibiting insulating properties and containing 1.5 or 2wt.% of graphene oxide (GO) in the polyurethane (PU) layer, were electrically activated via CO2 laser irradiation to obtain conductive paths at the surface exposed to the laser beam. As the material retained its insulating properties out of the irradiation areas, the laser scribing method allowed, at least in principle, a printed circuit to be easily and quickly fabricated. Combining a variety of investigation methods, including scanning electron microscopy (SEM), optical profilometry, IR and Raman spectroscopies, and direct current (DC) and alternate current (AC) electrical measurements, the effects of the laser irradiation were investigated, and the so-obtained electrical properties of laser-activated GO/PU regions were elucidated to unveil their potential use in both static and dynamic mechanical conditions. In more detail, it was shown that under appropriate CO2 laser irradiation, GO sheets into the GO/PU layer were locally photoreduced to form reduced-GO (RGO) sheets. It was verified that the RGO sheets were entangled, forming an accumulation path on the surface directly exposed to the laser beam. As the laser process was performed along regular paths, these RGO sheets formed electrically conductive wires, which exhibited piezoresistive properties when exposed to mechanical deformations. It was also verified that such piezoresistive paths showed good reproducibility when subjected to small flexural stresses during cyclic testing conditions. In brief, laser-activated GO/PU artificial leathers may represent a new generation of metal-free materials for electrical transport applications of low-current signals and embedded deformation sensors.
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Affiliation(s)
- Chiara Mastropasqua
- Department of Chemistry and NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre, University of Torino & INSTM-UdR Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Antonino Veca
- C.R.F. S.C.p.A.—Stellantis—Materials & Sustainability Engineering, C.so Settembrini 40, 10135 Torino, Italy
| | - Alessandro Damin
- Department of Chemistry and NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre, University of Torino & INSTM-UdR Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Valentina Brunella
- Department of Chemistry and NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre, University of Torino & INSTM-UdR Torino, Via P. Giuria 7, 10125 Torino, Italy
| | - Federico Cesano
- Department of Chemistry and NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre, University of Torino & INSTM-UdR Torino, Via P. Giuria 7, 10125 Torino, Italy
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7
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Bharath G, Hai A, Kiruthiga T, Rambabu K, Sabri MA, Park J, Choi MY, Banat F, Haija MA. Fabrication of Ru-CoFe 2O 4/RGO hierarchical nanostructures for high-performance photoelectrodes to reduce hazards Cr(VI) into Cr(III) coupled with anodic oxidation of phenols. CHEMOSPHERE 2022; 299:134439. [PMID: 35351477 DOI: 10.1016/j.chemosphere.2022.134439] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/16/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Dual-functional photo (electro)catalysis (PEC) is a key strategy for removing coexisting heavy metals and phenolic compounds from wastewater treatment systems. To design a PEC cell, it is crucial to use chemically stable and cost-effective bifunctional photocatalysts. The present study shows that ruthenium metallic nanoparticles decorated with CoFe2O4/RGO (Ru-CoFe2O4/RGO) are effective bifunctional photoelectrodes for the reduction of Cr(VI) ions. Ru-CoFe2O4/RGO achieves a maximum Cr(VI) reduction rate of 99% at 30 min under visible light irradiation, which is much higher than previously reported catalysts. Moreover, PEC Cr(VI) reduction rate is also tuned by adding varying concentration of phenol. A mechanism for the concurrent removal of Cr(VI) and phenol has been revealed over a bifunctional Ru-CoFe2O4/RGO catalyst. A number of key conclusions emerged from this study, demonstrating the dual role of phenol during Cr(VI) reduction by PEC. Anodic oxidation of phenol produces the enormous H+ ion, which appears to be a key component of Cr(VI) reduction. Additionally, phenolic molecules serve as hole (h+) scavengers that reduce e-/h+ recombination, thus enhancing the reduction rate of Cr(VI). Therefore, the Ru-CoFe2O4/RGO photoelectrode exhibits a promising capability of reducing both heavy metals and phenolic compounds simultaneously in wastewater.
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Affiliation(s)
- G Bharath
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates.
| | - Abdul Hai
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates
| | - T Kiruthiga
- Centre for Nanoscience and Technology, Anna University, Chennai, 600025, India
| | - K Rambabu
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates
| | - Muhammad Ashraf Sabri
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates
| | - Juhyeon Park
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Myong Yong Choi
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates.
| | - Mohammad Abu Haija
- Department of Chemistry, Khalifa University, P.O. Box, 127788, Abu Dhabi, United Arab Emirates.
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8
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Xu J, Chen R, Yun Z, Bai Z, Li K, Shi S, Hou J, Guo X, Zhang X, Chen J. Lightweight Epoxy/Cotton Fiber-Based Nanocomposites with Carbon and Fe 3O 4 for Electromagnetic Interference Shielding. ACS OMEGA 2022; 7:15215-15222. [PMID: 35572748 PMCID: PMC9089691 DOI: 10.1021/acsomega.2c01293] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 04/11/2022] [Indexed: 06/15/2023]
Abstract
Cotton fiber (CF)-based electroconductive papers were prepared by facile aqueous dispersion and drying processes combined with carbon nanotubes (CNTs) or graphene nanosheets (GNPs). To enhance the electromagnetic interference (EMI) shielding performance of the manufactured nanocomposites, the electroconductive papers were soaked with epoxy resin, which cooperated with the inner sprayed Fe3O4 nanoparticles. The EMI shielding effectiveness of Epoxy/CF-30-Fe3O4-30GNPs reached 33.1 dB, of which over 85.0% is attributed to absorption, which is mainly believed to be caused by the combination of GNPs and Fe3O4 nanoparticles due to their special structures and synergetic effects. Moreover, the infiltration of epoxy between the randomly distributed loose CFs and the multiple reflections inside the interconnected networks could also help to improve the EMI shielding performance of GNP-added samples. The prepared lightweight and stiff Epoxy/CF-30-Fe3O4-30GNP composites have promising applications in civil or military fields.
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Affiliation(s)
- Jianwei Xu
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Ruiyue Chen
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Zhigeng Yun
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Zhongyi Bai
- School
of Materials Science and Engineering, Henan Key Laboratory of Aeronautical
Materials and Application Technology, Zhengzhou
University of Aeronautics, Zhengzhou 450046, China
| | - Kun Li
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Shaozhe Shi
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Junji Hou
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Xiaoqin Guo
- School
of Materials Science and Engineering, Henan Key Laboratory of Aeronautical
Materials and Application Technology, Zhengzhou
University of Aeronautics, Zhengzhou 450046, China
| | - Xiaoli Zhang
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
| | - Jingbo Chen
- School
of Materials Science and Engineering, Zhengzhou
University, Zhengzhou 450001, China
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9
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Thadathil A, Kavil J, Kovummal GR, Jijil CP, Periyat P. Facile Synthesis of Polyindole/Ni 1-x Zn x Fe 2O 4 ( x = 0, 0.5, 1) Nanocomposites and Their Enhanced Microwave Absorption and Shielding Properties. ACS OMEGA 2022; 7:11473-11490. [PMID: 35415333 PMCID: PMC8992279 DOI: 10.1021/acsomega.2c00824] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/15/2022] [Indexed: 06/14/2023]
Abstract
The present work reports the fabrication of polyindole (PIN)/Ni1-x Zn x Fe2O4 (x = 0, 0.5, 1) nanocomposites as efficient electromagnetic wave absorbers by a facile in situ emulsion polymerization method for the first time. The samples were characterized through Fourier transform infrared spectroscopy, UV-vis spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, high-resolution transmission electron microscopy, and vibrating sample magnetometry. The resulting polyindole/Ni1-x Zn x Fe2O4 (x = 0, 0.5, 1) nanocomposites offer better synergism among the Ni1-x Zn x Fe2O4 nanoparticles and PIN matrix, which significantly improved impedance matching. The best impedance matching of Ni1-x Zn x Fe2O4/polyindole (x = 0, 0.5, 1) nanocomposites was sought out, and the minimum reflection loss of the composites can reach up to -33 dB. The magnetic behavior, complex permittivity, permeability, and microwave absorption properties of polyindole/Ni1-x Zn x Fe2O4 (x = 0, 0.5, 1) nanocomposites have also been studied. The microwave absorbing characteristics of these composites were investigated in the 8-12 GHz range (X band) and explained based on eddy current, natural and exchange resonance, and dielectric relaxation processes. These results provided a new idea to upgrade the performance of conventional microwave-absorbing materials based on polyindole in the future.
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Affiliation(s)
- Anjitha Thadathil
- Department
of Chemistry, University of Calicut, Thenhipalam, Kerala 673635, India
| | - Jithesh Kavil
- Department
of Chemistry, University of Calicut, Thenhipalam, Kerala 673635, India
| | - Govind Raj Kovummal
- Department
of Chemistry, Malabar Christian College, Calicut, Kerala 673001, India
| | - Chamundi P. Jijil
- Department
of Chemistry, University of Calicut, Thenhipalam, Kerala 673635, India
| | - Pradeepan Periyat
- Department
of Environmental Studies, Kannur University, Kannur, Kerala 670567, India
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10
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CuxCo1−xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for0 Highly Efficient Electromagnetic Interference Shielding. Int J Mol Sci 2022; 23:ijms23052610. [PMID: 35269754 PMCID: PMC8910661 DOI: 10.3390/ijms23052610] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/22/2022] [Accepted: 02/24/2022] [Indexed: 02/06/2023] Open
Abstract
CuxCo1−xFe2O4 (x = 0.33, 0.67, 1)-reduced graphene oxide (rGO)-thermoplastic polyurethane (TPU) nanocomposites exhibiting highly efficient electromagnetic interference (EMI) shielding were prepared by a melt-mixing approach using a microcompounder. Spinel ferrite Cu0.33Co0.67Fe2O4 (CuCoF1), Cu0.67Co0.33Fe2O4 (CuCoF2) and CuFe2O4 (CuF3) nanoparticles were synthesized using the sonochemical method. The CuCoF1 and CuCoF2 exhibited typical ferromagnetic features, whereas CuF3 displayed superparamagnetic characteristics. The maximum value of EMI total shielding effectiveness (SET) was noticed to be 42.9 dB, 46.2 dB, and 58.8 dB for CuCoF1-rGO-TPU, CuCoF2-rGO-TPU, and CuF3-rGO-TPU nanocomposites, respectively, at a thickness of 1 mm. The highly efficient EMI shielding performance was attributed to the good impedance matching, conductive, dielectric, and magnetic loss. The demonstrated nanocomposites are promising candidates for a lightweight, flexible, and highly efficient EMI shielding material.
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11
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Yao A, Liu C, Ye Y, Yang Y, Wang Z, Wang H, Feng Y, Gao J, Shi Y. Functionalizing MXenes with molybdenum trioxide towards reducing fire hazards of thermoplastic polyurethane. NEW J CHEM 2022. [DOI: 10.1039/d2nj02649j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The development of high-efficiency flame-retardant polymers with low toxic fumes during combustion remains a great challenge.
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Affiliation(s)
- Ansheng Yao
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, P. R. China
| | - Chuan Liu
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, P. R. China
| | - Yating Ye
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, P. R. China
| | - Ye Yang
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, P. R. China
| | - Zixiao Wang
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, P. R. China
| | - Hengrui Wang
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, P. R. China
| | - Yuezhan Feng
- Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Jiefeng Gao
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, P. R. China
| | - Yongqian Shi
- College of Environment and Safety Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, P. R. China
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