CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yabing Tian,Xuezhen Feng,Jing Wang,Shibin Shang,Fang Liu,Jianxin Jiang,Haibo Zhang,Yuxiang Chen,Zhanqian Song
Designing degradable foams with excellent Joule heating and electromagnetic interference (EMI) shielding properties are crucial for protecting both the environment and low-temperature sensitive electronic devices. In this work, we used 1,3-diaminopropane carbamate (DPC) as a latent foaming-curing agent to prepare soft-hard tunable, degradable bio-based epoxy foams through one-step chemical foaming method. Subsequently, using F3 foam with outstanding reversible compressibility as the substrate, we developed a silver-plated foam, F3A3, with predominantly reflective and high EMI shielding performance via silver mirror reaction. The silver-plated foam F3A3 exhibited an electromagnetic interference shielding effectiveness (EMI SE) of 76.37 dB in the X-band (8.2–12.4 GHz), achieving a shielding efficiency as high as 99.99999%. Additionally, under an input voltage of 1.0 V, the surface saturation temperature of F3A3 rapidly increased from room temperature to 104.0 °C and demonstrated excellent stability and durability in low-voltage Joule heating. Due to the presence of dynamic ester bonds and tertiary amine structures in the F3A3 foam, it exhibited catalyst-free self-healing capability. These superior properties make the silver-plated foam highly promising for applications in military equipment, aerospace, and wearable electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Engineering Materials
·
2023
·
IF 0
Xiaoming Shao,Weihao Xu,Min Yu,Liang He,Mingzheng Hao,Ming Tian,Wencai Wang
Highly conductive fillers are an essential raw material in the fabrication of conductive composites, paste, ink, adhesive, etc. Still, susceptibility to salt spray erosion remains a serious issue for silver-based fillers. Herein, we first prepared highly conductive silver-plated microspherical silica (Ag/pSiO2) through catechol/polyamine surface functionalization and subsequently formed a self-assembled inhibition layer on the surface of Ag/pSiO2 by using (3-mercaptopropyl)trimethoxysilane (KH590) to enhance the salt spray erosion resistance. The results suggested that the self-assembled KH590 greatly improved the salt spray erosion resistance of the Ag/pSiO2. The total shielding effectiveness (SEt) of the composites protected by KH590 was 106 dB after the salt spray erosion, which was even 16 dB higher than that before erosion. In contrast, the SEt of the composites without KH590 decreased significantly from 111 to 76 dB. Further studies revealed that the KH590 inhibitor strongly prevented the penetration of Cl– and subsequently enhanced the salt spray resistance. Considering the facile and effective preparation, this strategy could be applied in large-scale silver-based EMI shielding materials.
研究领域:
材料科学
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表面工程
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腐蚀防护
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电磁兼容性
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Zhenwei Wang,Shikai Zhao,Xue Guo,Jiao Li,Qiangqiang Hu,Yurun Feng,Fangyong Yu,Haibin Sun
La 0·6 Sr 0·4 Co 0·2 Fe 0·8 O 3-δ (LSCF), one kind of state-of-art solid oxide fuel cells (SOFCs) cathodes, often suffers from the chromium poisoning in the operating condition with Cr-based stainless steel interconnects, resulting in deteriorating cell performances. A simple electroless silver plating method was used to modify the surface of LSCF cathodes (named LSCF-Ag), and the anti-chromium stability of LSCF cathodes was studied. After the Cr treatment for 40 h, the polarization resistance ( R p ) of LSCF cathodes changes from 0.26 Ω cm 2 to 0.62 Ω cm 2 at 700 °C, while that of LSCF-Ag cathodes shows nearly no change (from 0.24 Ω cm 2 to 0.26 Ω cm 2 at 700 °C). In LSCF-Ag cathodes, the formation of AgCrO 2 instead of SrCrO 4 avoids the lack of excessive Sr in the A site of LSCF, and AgCrO 2 has an electronic conductivity two orders of magnitude greater than SrCrO 4 , thereby exhibiting significant survivability to Cr. The single cell with LSCF-Ag cathodes after Cr treatment shows a stable peak powder density of 288 mW cm −2 at 700 °C while taking wet hydrogen and air as fuel and oxidizer . As a comparison, the peak power density of single cells with blank LSCF cathodes drops by 12%. It is suggested that the simple electroless silver plating on LSCF cathodes is an effective method to suppress cathode chromium poisoning.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Haiwei Zhang,Xiangyu Zheng,Rijia Jiang,Zhihao Liu,Shanshan Zhu,Wenyao Li,Li Jiang,Xing Zhou
With the rapid development of modern information technology, electromagnetic wave has become a new type of pollution source, so there is an urgent need for an efficient electromagnetic interference (EMI) shielding material to control electromagnetic pollution. Among them, EMI shielding materials in many fields are required to be lightweight, efficient and durable. In this study, silver-plated graphene oxide (GO@Ag) is added as a conductive filler to the polyurethane (PU) matrix, and a composite EMI shielding material with excellent conductive network structure is obtained through co-foaming. Conductive network structure provides high EMI shielding effectiveness (EMI SE) and good mechanical properties for composite shielding materials. When the content of GO@Ag is 15%, the EMI SE reaches 29.4 dB, and the specific EMI SE (SSE) reaches 237.9 dB×cm 3 ×g −1 . Reflection is the main shielding mechanism of composite shielding materials. Good conductivity makes the shielding materials and air impedance mismatched. When electromagnetic waves contact the shielding materials, the reflection effect will occur. Furthermore, this work provides a new research direction for EMI shielding in the fields of aerospace, precision electronics and lightweight equipment.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2016
·Vol. 9
·期 9
·2760-2771
·
IF 8.893
Wang Delong,Zhao Xiangwei,Liu Xing,Mu Zhongde,Gu Zhongze
Short acquisition time and small volumes of incubated bacterial cultures are ideal for the routine and rapid identification or screening of electricigens in research and applications of microbial fuel cells. In this study, a functional substrate based on colloidal photonic crystals (PCs) was developed both for the filtration and identification of electricigens by surface-enhanced Raman scattering (SERS). The fabrication of the substrate was simplified by electroless plating of silver on filtration-based self-assembled PCs on a filter membrane. The silver-plated ordered PC structure provided a 10 7 -fold enhancement of Raman intensity compared to that obtained with a bare PC substrate. The substrate allowed for a “drop and measure” method of bacterial identification within 5 min with a 5 μL sample volume only. The results showed that not only the electricigens Geobacter sp . and Shewanella sp . could be discriminated with species and strain specificity, but also Geobacter sp . and pilus-mutated Geobacter sp . strains. The developed silver-plated PC filter offers tremendous opportunities in energetic, environmental, and clinical applications.
研究领域:
生物技术
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITE STRUCTURES
·
2025
·
IF 7.1
Xinyi Ju,Chao Wang,Xueliang Jiang,Feng You,Wei Zhu,Chenjian Li,Chu Yao
The porous composites are positive for noise and electromagnetic wave shielding. Favorable microstructure is the key for realization of noise and electromagnetic co-shielding. Thus, the new method for CNT modification by the carboxylation and silver plating were developed in this study, and the modified CNT and polyimide (PI) were successfully fabricated into conductive aerogels. The modified CNT can effectively regulate the pore structure and conductive network through the interfacial reaction between carboxylation in CNT and polyamide acid. Attributed to a suitable pore structure and three-dimensional conductive network, the PI/CNT composite aerogel simultaneously achieved a sound absorption coefficient of 0.9 in 6000 Hz and an electromagnetic shielding effect of 28 dB in the X band through the absorbing mechanism. The satisfactory electromagnetic and sound shielding were integrated with the PI/CNT composite aerogel, representing a wider prospect of application in electronic and communicating equipment.
研究领域:
材料科学
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纳米技术
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声学
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电磁学
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化学工程
✓ 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）