Materials Today Communications
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2025
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IF 4.5
Yuntong Wen,Hao Bian,Yongpeng Ran,Yonghao Xie,Minmin You,Huimin Wen,Liyun Shi,Jingquan Liu,Zude Lin
The 2D Ti 3 C 2 T x MXene anchored with magnetic particles has garnered significant attention due to its superior electromagnetic shielding performance and low reflection coefficient. However, current research on MXene-anchored magnetic particles faces several challenges, including complex fabrication processes, difficulty in controlling compositional ratios, the predominant use of spherical magnetic particles. In this work, by employing surfactants, FeCo alloy and Ni flakes were uniformly anchored onto MXene, the preparation process of the composite is simple and facilitates better control over the ratios of individual samples. Due to the unique structure formed by the intercalation of FeCo alloy and Ni flakes within the MXene layers, M-FC-N-35 exhibits an average electromagnetic shielding effectiveness of 61.2 dB within the Ku-band and maintains a reflection coefficient as low as 0.69. Additionally, the M-FC-N-35 composite was applied to the surface of the temperature sensor casing. It was found that under an electromagnetic field strength of 200 V/m and within a frequency range of 6–18 GHz, the temperature measurement deviation was reduced to 9.35 % of that of the sensor without the shielding material, demonstrating high electromagnetic interference resistance. This work provides guidance for simplifying the fabrication process of MXene composites with magnetic metals and enriching the system of electromagnetic shielding materials.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuhui Feng,Mingye Zhu,Wenjun He,Yan Bai,Ning Ding,Zhen You,Xiang Zou,Weiwei Zhao,Shujuan Liu,Qiang Zhao
The conductive polymer composites (CPC) with elevated levels of conductivity typically exhibit enhanced electromagnetic interference shielding effectiveness (EMI SE), however, this enhancement is often paralleled by an augmented risk of secondary electromagnetic (EM) pollution, attributable to the increased EM reflection. Developing a facile method to construct an eco-friendly CPC for EMI shielding that simultaneously exhibits low reflection and high shielding performance remains a promising yet challenging pursuit. Moreover, excellent shielding materials should possess exceptional thermal management capabilities to protect individuals or equipment under extreme conditions. Herein, we have engineered the MXene/polyurethane (MXene/PU) sponge (MPS) modules characterized by the hierarchical porous structure. Through the strategic modular combination of impedance-matching and impedance-mismatching modules tailored for different application contexts, the customizable gradient MXene/PU sponge (GMPS) facilitates achieving a balance of exceptional average EMI SE (44.6 dB), a low reflection coefficient (R = 0.18), and superior photo/electrothermal conversion capability. Furthermore, both experimental results and finite element analyses are adopted to explore the effect of the arrangement order of GMPS on EMI shielding performance. Leveraging the green, health-conscious, and flexibly customizable approach, it manifests tremendous potential across various areas, including intelligent residences and multifunctional integrated systems.
研究领域:
材料科学
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电磁学
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热能工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Bincheng Huang,Xiangyu Ma,Mengjiao Zhang,Hao Xu,Yuxiao Wang,Peng E,Pei Xu,Yunsheng Ding
The reflective dominant electromagnetic interference (EMI) shielding performances of biodegradable polylactic acid (PLA) have seriously limited its application in electrical and electronic fields. Imidazolium polyurethane (IPU) modified carbon nanotubes (CNTs) and nickel@carbon nanotubes (Ni@CNTs) were used to improve the PLA/PCL composites' EMI shielding properties. The EMI shielding effectiveness (SE) of all samples increased with increasing CNTs and IPU2 content. The values of PLA5/PCL5 and PLA7/PCL3 composites with 10 wt% CNTs are 36.7 dB and 34.1 dB, and the reflection coefficient (R) of the samples is less than 0.5. IPU1 modified Ni@CNTs is selectively distributed at the PCL phase for the magnetic effect, and IPU2 modified CNTs are mainly located at the interface of the co-continuous structure, establishing a more complete three-dimensional conductive network. By constructing a dispersed structure of magnetic conductive fillers and a continuous structure of conductive fillers, absorptive dominant EMI shielding materials are realized through an electromagnetic multilayered structure. The addition of Ni@CNTs greatly enhanced the electromagnetic absorption, as well as the three-dimensional conductive network formed by CNTs, which can enhance electromagnetic attenuation. Plenty of interfaces in the co-continuous structure facilitated the multiple reflections of electromagnetic waves, thus achieving low-reflection electromagnetic shielding.
研究领域:
材料科学
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聚合物复合材料
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电磁屏蔽
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Jimei Xue,Xiaoling Liu,Yuqiu Wang,Hepeng Zhao,Xiaomeng Fan
Oxide ceramic matrix composites (OCMC) have good high-temperature resistance, oxidation resistance, and mechanical properties. However, the microwave absorbing properties of OCMC areinsufficient due to the low dielectric and low loss characteristics of oxide ceramics, so it is urgent to develop a kind of the oxide ceramic matrix with adjustable microstructure and electromagnetic properties. PDC-SiOC ceramics are the optimal oxide ceramics whose component and microstructure can be adjusted by rare earth nitrate modified polysiloxane precursor. For Sc(NO 3 ) 3 modified PDC-SiOC ceramics, rare earth metals not only can react with siloxy groups to form silicates at high temperatures but also can catalyze the formation of SiCnws. Herein, rare earth nitrate modified polysiloxane precursor was pyrolyzed at 900°C, and then annealing at high temperature to form silicate and SiCnws. After annealing at 1400°C, a large amount SiCnws was in situ formed conductive network structure in SiOC ceramic, so the SiOC ceramic with SiCnws had great electromagnetic wave (EMW) absorbing properties, the maximum effective absorption bandwidth (EAB max ) and the minimum reflection coefficient (RC min ) at the thickness of 2.75 mm reach 4.0 GHz and −42.3 dB in X -band, respectively. By the double-layer impedance matching design, the EAB can be effectively improved, which provide a good way for the design and fabrication of OCMC with advanced (EMW) absorbing properties.
研究领域:
材料科学
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微波吸收材料
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陶瓷基复合材料
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纳米材料
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电磁性能
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）