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Xie Z, Xiao D, Yu Q, Wang Y, Liao H, Zhang T, Liu P, Xu L. Fabrication of Multifunctional Silylated GO/FeSiAl Epoxy Composites: A Heat Conducting Microwave Absorber for 5G Base Station Packaging. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7511. [PMID: 38138659 PMCID: PMC10744416 DOI: 10.3390/ma16247511] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023]
Abstract
A multifunctional microwave absorber with high thermal conductivity for 5G base station packaging comprising silylated GO/FeSiAl epoxy composites were fabricated by a simple solvent-handling method, and its microwave absorption properties and thermal conductivity were presented. It could act as an applicable microwave absorber for highly integrated 5G base station packaging with 5G antennas within a range of operating frequency of 2.575-2.645 GHz at a small thickness (2 mm), as evident from reflection loss with a maximum of -48.28 dB and an effective range of 3.6 GHz. Such a prominent microwave absorbing performance results from interfacial polarization resonance attributed to a nicely formed GO/FeSiAl interface through silylation. It also exhibits a significant enhanced thermal conductivity of 1.6 W/(mK) by constructing successive thermal channels.
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Affiliation(s)
- Zhuyun Xie
- Centre of Chip Chemistry, Huangpu Institution of Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Guangzhou 510663, China; (Z.X.); (D.X.); (Q.Y.); (Y.W.); (H.L.)
| | - Dehai Xiao
- Centre of Chip Chemistry, Huangpu Institution of Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Guangzhou 510663, China; (Z.X.); (D.X.); (Q.Y.); (Y.W.); (H.L.)
| | - Qin Yu
- Centre of Chip Chemistry, Huangpu Institution of Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Guangzhou 510663, China; (Z.X.); (D.X.); (Q.Y.); (Y.W.); (H.L.)
| | - Yuefeng Wang
- Centre of Chip Chemistry, Huangpu Institution of Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Guangzhou 510663, China; (Z.X.); (D.X.); (Q.Y.); (Y.W.); (H.L.)
| | - Hanyi Liao
- Centre of Chip Chemistry, Huangpu Institution of Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Guangzhou 510663, China; (Z.X.); (D.X.); (Q.Y.); (Y.W.); (H.L.)
| | - Tianzhan Zhang
- College of Material Science and Engineering, Jilin Jianzhu University, Changchun 130119, China;
| | - Peijiang Liu
- Reliability Physics and Application Technology of Electronic Component Key Laboratory, The Fifth Electronics Research Institute of the Ministry of Information Industry, Guangzhou 510610, China
| | - Liguo Xu
- College of Light Chemical Industry and Materials Engineering, Shunde Polytechnic, Foshan 528333, China
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Li J, Hua Y, Yuan Q, Gou W, Sun H, Lin L, Wang M, Yu M, Qin A. Fabrication of the Fe-Doped Corona Schiff Base for Enhanced Microwave Absorption Performance. ACS OMEGA 2023; 8:38885-38894. [PMID: 37901571 PMCID: PMC10600886 DOI: 10.1021/acsomega.3c02956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 10/04/2023] [Indexed: 10/31/2023]
Abstract
A corolla-shaped Schiff base polymer was synthesized from terephthalaldehyde (TPAD), glutaraldehyde (GA), and p-phenylenediamine (PPD) by block copolymerization, and Schiff base iron complexes were formed by doping with FeCl3. The microscopic morphology, crystal structure, and elemental valence state were characterized by field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Comparing the change of conductivity before and after Fe3+ doping, it was found that the conductivity did not break away from the category of insulator, and the doped sample is a paramagnetic material. Morphological changes were observed by adjusting the ratio of GA to TPAD, and it was found that the corolla-like structure was most complete when the ratio of GA to TPAD was 2:1, and its Schiff base iron complex absorbed waves better. At a thickness of 3 mm, the absorption effect can reach below -10 dB at 12.44-15.16 GHz, and the maximum absorption value is -45.07 dB at a thickness of 3.8 mm; it is an organic absorbing agent with excellent impedance matching and absorbing properties.
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Affiliation(s)
- Jun Li
- Henan
Engineering Technology Research Center for Fiber Preparation and Modification, Zhengzhou 450000, P. R. China
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Yuhang Hua
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Qiannan Yuan
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Wenqi Gou
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Hao Sun
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Long Lin
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Mengtao Wang
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
| | - Mingxun Yu
- China
North Industries Group, Corporation Institute 53, Ji’nan 250031, P. R. China
| | - Aiwen Qin
- Henan
Engineering Technology Research Center for Fiber Preparation and Modification, Zhengzhou 450000, P. R. China
- College
of Materials Engineering, Henan University
of Engineering, Zhengzhou 450000, P. R. China
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He M, Liao Q, Zhou Y, Song Z, Wang Y, Feng S, Xu R, Peng H, Chen X, Kang Y. Lightweight TiO 2@C/Carbon Fiber Aerogels Prepared from Ti 3C 2T x/Cotton for High-Efficiency Microwave Absorption. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:945-956. [PMID: 35019654 DOI: 10.1021/acs.langmuir.1c02237] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Carbon fiber aerogel (CFA) derived from cotton wool as a potential microwave absorbing material has received intensive attention owing to the low density, high conductivity, large surface area, and low cost, but its applications are limited by the relatively high complex permittivity. To solve this problem, TiO2@C (derived from Ti3C2Tx) is introduced into CFA to prepare lightweight TiO2@C/CFA composites based on electromagnetic (EM) parameter optimization and enhanced EM wave attenuation performance. The microwave absorption capacity of TiO2@C/CFA-2 composite is obviously better than that of CFA. It is confirmed that good impedance matching derived from the combination of TiO2@C and CFA is the main factor to achieve excellent microwave absorption. Moreover, the improved microwave absorption capabilities are closely related to multiple EM wave absorbing mechanisms including multiple reflections and scattering, dipolar and interfacial polarization, and conductivity loss. TiO2@C/CFA-2 possesses a maximum reflection loss (RL) of -43.18 dB at a low response frequency of 6.0 GHz. As the matching thickness is less than 2.0 mm, the maximum RL values can still exceed -20 dB, and at the same time, the wide effective absorption bandwidth (EAB) below -10 dB achieves 4.36 GHz at only 1.9 mm thickness. Our work confirms that the lightweight and high-performance TiO2@C/CFA composites are promising choices and offer a new approach to design and construct carbon-based microwave absorbents derived from biomass.
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Affiliation(s)
- Man He
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Qiang Liao
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
| | - Yuming Zhou
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
| | - Zhaoping Song
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Yongjuan Wang
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
| | - Shuangjiang Feng
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
| | - Ran Xu
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
| | - Hao Peng
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
| | - Xi Chen
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
| | - Yifan Kang
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing 211189, China
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Choudhury S, Sahoo U, Pattnayak S, Padhiari S, Tripathy M, Hota G. Hematite nanoparticles decorated nitrogen-doped reduced graphene oxide/graphitic carbon nitride multifunctional heterostructure photocatalyst towards environmental applications. NEW J CHEM 2022. [DOI: 10.1039/d2nj01301k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The carcinogenic heavy metals and aromatic organic compounds linger as wastewater pollutants implying great menace to the ecological balance. To solve these environmental pollution problems, the photocatalytic process is an...
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Mondal J, Srivastava SK. Room-Temperature One-Step Synthesis of Silver/Reduced Graphene Oxide Nanocomposites as an Excellent Microwave Absorber. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13409-13419. [PMID: 34736324 DOI: 10.1021/acs.langmuir.1c02110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The present study is focused on room-temperature synthesis carried out by reduction of an aqueous silver nitrate (AgNO3) and AgNO3/graphene oxide (GO) dispersion using a low-cost commercial Fehling B solution in one step to form silver quantum dots (Ag QDs) and their Ag/reduced graphene oxide (Ag/RGO) nanocomposites and their characterization. The crystallinity, surface chemistry, structural, and morphological studies indicated the formation of crystalline small-sized quasispherical-functionalized Ag particles distributed uniformly on the surface of RGO. The conductivity measurements further showed an improvement in the conductivity of Ag/RGO nanocomposites as compared to neat Ag QDs. Our findings showed that Ag/RGO nanocomposites prepared by using 0.055 wt % of GO exhibited a total enhanced electromagnetic interference (EMI)-shielding efficiency (SET) of ∼39.2-42.3 dB (2-8 GHz) with a maximum value of ∼43.8 dB at 7. 5 GHz due to conduction loss, an interconnected conducting network, and a synergistic effect, and it followed an absorption mechanism. Furthermore, this superior absorption-dominated shielding conferred reflection loss (RL) in the range of -79 to -82.5 dB with a RL minima of -88 dB at 7.5 GHz, considering an effective absorption bandwidth of ∼6 GHz with 99.9% absorptivity. It is anticipated that Ag/RGO nanocomposites prepared in one step at room temperature could find potential EMI-shielding applications.
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Affiliation(s)
- Jayanta Mondal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302 West Bengal, India
| | - Suneel Kumar Srivastava
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302 West Bengal, India
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Manna R, Ghosh K, Srivastava SK. Functionalized Graphene/Nickel/Polyaniline Ternary Nanocomposites: Fabrication and Application as Electromagnetic Wave Absorbers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:7430-7441. [PMID: 34115512 DOI: 10.1021/acs.langmuir.1c00804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The evolution of high electromagnetic absorption materials is essential in the fast growing electronic industry in overcoming electromagnetic pollution. In view of this, a series of Ni nanoparticle-decorated functionalized graphene sheets (FG/Ni) are synthesized by a solvothermal method using different ratios of FG/Ni precursors. Subsequently, FG/Ni is subjected to in situ polymerization of aniline to form FG/Ni/PANI ternary composites and characterized. The total electromagnetic interference shielding efficiency (SET) measurements on FG/Ni/PANI with an optimized FG/Ni ratio (50 mg:600 mg NiCl2·6H2O) exhibit enhanced performance, i.e., ∼47-65 dB (2-3.8 GHz) and ∼65-45 dB (3.8-8 GHz), following absorption as the dominant mechanism due to the matching of dielectric loss and magnetic loss. It is anticipated that such excellent performance of robust FG/Ni/PANI ternary composites at a very low thickness (0.5 mm) has great potential in the application of microwave-absorbing materials.
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Affiliation(s)
- Rakesh Manna
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Kalyan Ghosh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
| | - Suneel Kumar Srivastava
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, West Bengal, India
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