COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Bai Jiang,Jianxun Shang,Faying Zhang,Na Li,Yan Wang,Zuming Hu,Junrong Yu
Developing high-efficiency electromagnetic interference (EMI) shielding composite membranes along with additional functionalities to extend the application scenarios is highly desirable for the next generation electronic devices. Here, we report an ultrathin and flexible EMI shielding materials with sensitive Joule heating and outstanding infrared stealth performance was fabricated from poly-m-phenylene isophthalamide (PMIA) and Ag nanoparticles (AgNPs) through an innovation and simplicity method of electrospinning and electroless plating. Profiting from a continuous three-dimensional (3D) conductive network, the final membrane achieves an outstanding EMI shielding effectiveness (SE) of 100.51 dB (in X-band), a remarkable Joule heating properties with a fast thermal response and low driving voltage (<0.5 V), and an outstanding infrared stealth with a low infrared emissivity (0.28). Meanwhile, the prepared composite membrane demonstrates stable EMI SE even after water washing, continuous bending, and heating treatment. This work integrates high-performance fiber PMIA, characterized by high heat resistance, flame retardancy, self-extinguishing properties, and chemical resistance, with functions such as EMI shielding, infrared stealth, and autonomous thermal management. It has great development potential if utilized in specialized combat uniforms under harsh conditions.
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
POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Lu Shen,Xinyue Jiang,Long Ni,Yinfu Luo,Mei Liang,Yunhua Yang,Shengtai Zhou,Huawei Zou
With the rapid development of science and technology, there is an increasing demand for lightweight materials with excellent electromagnetic interference (EMI) shielding and infrared stealth performance for space applications. In this study, a series of polyimide/silica (PI/SiO 2 ) aerogels were fabricated by blending, which were dried using supercritical CO 2 drying method. Then, PI/SiO 2 composite aerogels were carbonized to prepare carbon aerogels with superior thermal insulation and EMI shielding properties. The carbonized PI/SiO 2 aerogels contained mesopores which enhanced the interfacial thermal resistance and improved the thermal insulation performance by 69% when compared with those samples without SiO 2 . The presence of mesopores adjusted the impedance matching of carbon aerogels, which allowed more EM waves to enter inside of the aerogels and dissipate through multiple reflections, thereby achieving absorption-dominant EMI shielding performance. This study proposed a viable approach to preparing PI-based carbon aerogels with excellent infrared stealth and EMI shielding performance, which show promising applications in aerospace and related industries. Highlights The introduction of SiO 2 regulated the microstructure of carbon aerogels. The thermal conductivity of carbon aerogels reached as low as 0.10 W/mK with 3 wt% SiO 2 . The EMI performance of carbon aerogel was enhanced from 22.4 to 33.5 dB.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Small Structures
·
2025
·
IF 11.3
Ibrahim Abdalla,Ahmed Elhassan,Salma Ali,Malik Yonis Hassan Saty,Ekrema Adam,Lihua Zou,Qingqing Ni,Zhenzhen Xu
Carbon nanofibers (CNFs) exhibit inherent dielectric properties that enhance electromagnetic (EM) wave absorption, yet challenges exist in expanding their effective absorption bandwidth (EAB) and improving flexibility. Many studies fail to adequately consider how structural factors influence performance when combining CNFs with magnetic materials. To address these issues, a 1D carbon nanocomposite is developed by embedding magnetic oxide nanoparticles within CNFs using a simple electrospinning technique. This approach improves membrane flexibility by disrupting rigid alignment and introducing dynamic magnetic interactions, while also creating defect-rich interfaces that increase the amorphous content (61%) of the CNFsF composite, leading to improved EM wave absorption. The unique macro/mesoporous morphology provides internal interfaces and heterogeneous boundaries that effectively trap and dissipate EM waves. As a result, the flexible CNF composites demonstrate significant EM wave absorption performance, achieving a minimum reflection loss (RL min ) of −39.8 dB at 4.64 GHz and an abroad EAB of up to 7 GHz at only 2.5 mm thickness. Computer simulation technology (CST) simulations indicate a maximum radar cross-section reduction of 21.1 dB m 2 , highlighting the material's radar stealth capability. This research advances the development of high-performance materials and offers new strategies for enhancing absorption properties through composite engineering.
研究领域:
材料科学
·
电磁学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
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2022
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IF 11.322
Jianwei Zhang,Gengyuan Liang,Ying Xiao,Wenshu Zhao,Jun Tang,Su Ju,Shuxin Bai,Petra Pötschke,Jürgen Pionteck
For graphene-based film, versatility is essential for its potential multi-functional applications. In order to obtain graphene-based films with superior mechanical and electrical properties, a “brick and mortar” structure has been proposed by previous researchers. In this structure, the graphene or reduced graphene oxide (rGO) layers are the “bricks”, while the “mortar” is various, which is critical to the performance of the films. In this work, the mixture of carbon nanotube (CNT)/polyurethane (PU) was introduced as the mortar to bind rGO layers, forming a dense layered film. The PU builds strong interactions between rGO layers through covalent bonds , while the CNTs help to highly reduce the inter-layer electrical resistance. Hence, the CNT/PU/rGO film shows an optimized tensile strength of 1193 MPa and an electrical conductivity of 687 S cm −1 . More remarkably, the PU has good compatibility with ionic liquid (IL), and can build internal transport tunnels for IL in the films. IL was further introduced into the composite film . By applying voltage upon the two sides of the film, ion transport across the two sides of the film can be fast and precisely guided. The interaction between IL and the nano-carbon assemblies can tune the infrared emissivity of the composite film, which “function” proposes the film for potential application as a flexible infrared camouflage device. The performance of the infrared camouflage film is investigated in this work.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2020
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IF 3.286
Anfeng Zhu,Honglong Xing,Qi Fan,Xiaoli Ji,Ping Yang
Sheet aluminum powder was used as the substrate and aniline as the polymer monomer, to design novel Al/PANI composites via in-situ polymerization, which exhibited high electromagnetic wave absorption properties and low infrared emissivity. These unique bifunctional composite were systematically characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy , scanning electron microscope, IR-2 dual-band emission rate measuring instrument and vector network analyzer. The calculated results showed that the maximum reflection loss value of Al/PANI composite reached −46.09 dB at 14.56 GHz with a film thickness of only 1.0 mm. Meanwhile, the infrared emission rate of the composite was 0.55. The excellent electromagnetic absorption performance may be ascribed to its superior conductivity and unique structure. The merits of as-synthesized composites with high-performance microwave absorbing properties and low infrared emissivity indicate the potential use of Al/PANI composites in the applicable stealth fields.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Dehua Ma,Yongshuai Xie,Lin Wang,Ying Peng,Yunguang Yin,Xinqiang Wang,Benxue Liu,Guanghui Zhang,Luyi Zhu,Dong Xu
La 2 Zr 2 O 7 fibrous membrane (LZFM), with high uniform distribution and single phase, was fabricated by sol–gel method combined electrospinning technique and the precursor of lanthanum zirconium bimetallic complex, polyacetylacetone lanthanum-zirconium (PALZ) with the ceramic yield of 57.8% was synthesized for the first time. The LZFM had high heat radiation reflectivity (750–2500 nm: Avg 93.2%@1200 °C), low thermal conductivity (25.4 mW·m −1 ·K −1 @-40 °C, 57.5 mW·m −1 ·K −1 @1000 °C), low density (28–50 mg/cm 3 ) and excellent flexibility until 1300 °C. The grain arrangement on the fiber surface was tight with no obvious defects and pores, and the average grain size was only 47.1 nm at 1000 °C for 8 h. The LZFM exhibited excellent high-temperature insulation performance using silicon carbide rod and butane flame as the heat source up to 1530 °C and 1400 °C, respectively. Furthermore, the layered assemblage of LZFM and Al foil was designed, serving as a thermal insulation layer, low-infrared-emission, and high-infrared-reflection layer. The combined structure effectively hid high-temperature targets and achieved infrared stealth (>1300 °C). From the above results, one could find that the LZFM possessed a super high-temperature insulation effect with high thermal stealth performance, implying that LZFM will have a good prospect in thermal insulation protection and infrared stealth.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Jie Huang,Liuying Wang,Gu Liu,Weichao Wang,Chaoqun Ge,Haoke Yang,Xinyuan Jing,Bin Wang
With the rapid development of radar detection systems, the issue of electromagnetic wave stealth has become increasingly prominent. This paper presents a fabrication strategy for a composite material composed of CoFe 2 O 4 quantum dots in situ loaded onto CNTs through a multi-ligand combined thermal carbon shock, aiming to optimize multiple loss mechanisms for efficient electromagnetic wave absorption. The CoFe 2 O 4 quantum dots serve as loss centers, enhancing the heterogeneous charge distribution and the synergistic effects of magnetic resonance and magnetic exchange due to their supercritical size. Concurrently, the CNTs construct an efficient conductive network, providing a pathway for the free electrons within the CoFe 2 O 4 crystals and enhancing conductive loss. The composite achieves an effective bandwidth of 8.02 GHz and a maximum absorption of -52.7 dB at a filling ratio of only 25%, nearly covering the X and Ku bands. Furthermore, computer simulation techniques indicate that this coating exhibits excellent radar stealth performance on the F-22 Raptor fighter jet, presenting potential for the development and application of a new type of lightweight stealth coating.
研究领域:
材料科学
·
电磁学
·
国防科技
✓ 已验证
产品关联
DOI
高影响因子
Advanced Fiber Materials
·
2024
·
IF 17.2
Meng Xiangwei,Yu Meijie,Wang Chengguo
The exploitation of antennas with both electromagnetic stealth and efficient power transmission is of great significance in the information age. Therefore, from the perspective of multi-component composite and microtopography engineering, Ni/C@ZrO 2 ternary nanofibers are synthesized through electrospinning and subsequent carbonization. Profiting from the reasonable selection of components and exquisite micro-structure, the synergistic effect is fully developed, with the simultaneous achievement of perfect impedance matching and superior attenuation capacity. Precisely speaking, compared with carbon nanofibers and binary nanofibers, Ni/C@ZrO 2 exhibits the minimum reflection loss values of − 60.1 dB at 11.0 GHz, an ultrawide bandwidth up to 7.6 GHz at 3.3 mm, and radar cross-section values less than − 20 dBm 2 at most observation angles. A patch antenna with Ni/C@ZrO 2 acted as dielectric substrate is designed and displays efficient transmission efficiency, which means the theoretical feasibility of research on stealthy information transmission equipment, and enhances the competitiveness in comparison with other absorbent candidates. Hence, this study successfully prepares a high-performance electromagnetic wave absorbent, and sheds light on the future development of fibrous functional materials.
研究领域:
材料科学
·
电磁学
·
信息传输技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Kunlin Chen,Jingyu Chen,Changyue Xu,Haie Zhu,Jing Hu,Kejing Yu
High-performance color-changing compounds, recognized as prominent smart materials, dynamically alter their color in response to external environmental stimuli. However, existing compounds exhibit limited responsiveness and color diversity, presenting challenges in the development of textiles responsive to multiple stimuli. This research introduces a novel design for dual-responsive color-changing microcapsules, employing a Pickering emulsion template method. The larger compartment encloses photosensitive dyes, whereas the smaller one contains thermochromic phase-change colorants. Adjusting the density of nanocapsules in the smaller compartment on the microcapsule surface enables a spectrum of colors, including red, yellow, blue, and green, triggered by light and heat. When incorporated into textiles, these microcapsules bestow adaptive color-changing attributes and infrared stealth capabilities onto the fabrics. Additionally, by modulating the color via surface micro/nanostructures, textile surfaces can exhibit hydrophobic and oleophobic properties. Such enhancements extend the textiles’ potential applications in areas like anti-counterfeiting and military operations.
研究领域:
材料科学
·
纺织工程
·
智能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiasheng Wei,Ping He,Yantao Yang,Chunxia Tang,Zhu Long,Xiao Chen,Tingzhou Lei,Lei Dai
The structural design of material significantly influences its electromagnetic interference (EMI) shielding performance, providing an intelligent approach to attain desirable EMI shielding performances. Inspired by the ultra-large distance of the middle layer in corrugated paper, we proposed a novel composite paper with corrugated paper-like structure via the assembling of two pieces of surface-modified filter paper and an aerogel film. Specifically, a conventional filter paper was modified with the conductive hydrogel film consisting of TEMPO-oxidized cellulose nanofibers (TOCNF), cationic starch (CS) and Ti 3 C 2 T x . The TOCNF and CS rapidly formed a composite hydrogel when mixed, due to their electrostatic interactions. The aforementioned aerogel film was produced through the freeze-drying of TOCNF/CS hydrogel, and it enlarged the distance between two conductive hydrogel film modified papers when inserted. The assembled composite papers demonstrated a maximum EMI SE of 71.0 dB, improved by 19.7 % as compared to the control without the aerogel film (59.3 dB). The expansion of the distance between conductive layers likely facilitated the enhancement in the multiple reflections and absorptions of electromagnetic waves. This novel composite paper showed better EMI shielding performance than many previously-reported materials considering the thickness and conductive filler dosage. In addition, the composite paper also showed exceptional infrared stealth capabilities since it effectively shielded the thermal radiation from human body. The composite paper still exhibited good infrared stealth ability at high temperature conditions (up to 120 ℃). Therefore, this research could inspire innovative concepts in designing high-performance and multifunctional EMI shielding materials in an economical way.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Yibing Ma,YaYa Zhou,Chunhong Qi,Youyi Sun,Yinghe Zhang,Yaqing Liu
A new class microwave absorption coating based on assemblies of core-shell magnetic nanoparticles was facile preparation to improve absorption bandwidth and durability. The microwave absorption coating with a thickness of ca.1.5mm exhibited a wide bandwidth (ca.9.2GHz). Furthermore, the durability of microwave absorption coating was further evaluated. It showed good water-shedding ability and mechanical stability. The excellent performance was mainly attributed to special surface rough structure and low surface energy of coating, resulting from assemblies of core-shell magnetic nanoparticles . These provide a new idea to design and preparation of microwave absorption coating with high performance for application in stealth technology.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ting-yu Zhu,Wan-jun Jiang,Shuang Wu,Zi-jie Huang,Yu-long Liu,Xiao-dong Qi,Yong Wang
Electromagnetic interference (EMI) shielding and infrared stealth technologies are essential for military and civilian applications. However, it remains a significant challenge to integrate various functions efficiently into a material efficiently. Herein, a minimalist strategy to fabricate multifunctional phase change organohydrogels (PCOHs) was proposed, which were fabricated from polyacrylamide (PAM) organohydrogels, MXene/PEDOT:PSS hybrid fillers, and sodium sulfate decahydrate (Na2SO4·10H2O, SSD) via one-step photoinitiation strategies. PCOHs with a high enthalpy value (130.7 J/g) and encapsulation rate (98%) could adjust the temperature by triggering a phase change of SSD, which can hide infrared radiation to achieve medium-low temperature infrared stealth. In addition, the PCOH-based sensor has good strain sensing ability due to the incorporation of MXene/PEDOT:PSS and can precisely monitor human movement. Remarkably, benefiting from the electron conduction of the three-dimensional conductive network and the ion conduction of the hydrogel, the EMI shielding efficiency (k) of PCOHs can reach 99.99% even the filler content as low as 1.8 wt %. Additionally, EMI shielding, infrared stealth, and sensing-integrated PCOHs can be adhered to arbitrary targets due to their excellent flexibility and adaptability. This work offers a promising pathway for fabricating multifunctional phase change materials, which show great application prospects in military and civilian fields.
研究领域:
材料科学
·
电子工程
·
军事技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）