COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Ziran Du,Cheng Zhou,Hao-Yang Mi,Heng Li,Ziwei Qin,Ruyan Xu,Yaming Wang,Chuntai Liu,Changyu Shen
High-performance electromagnetic interference (EMI) shielding materials with low reflection are urgently required due to secondary electromagnetic pollution. MXene-based shielding materials often encounter a dilemma of high reflectance due to the high conductivity and permittivity of MXene , Herein, ecoflex-encased gradient MXene-decorated melamine foams (eGMMFs) are proposed to achieve both ultra-low reflection and efficient shielding. By designing a gradual increased gradient MXene conductive network and a reflector of reduced graphene oxide , the eGMMF integrates the impedance matching layer, loss layer, and reflective layer, which contributes to a average shielding efficiency of 78.8 dB and an reflection coefficient (R) of 0.022 in the X-band. A recorded low R value of 3.84 × 10 -5 is obtained at 11.52 GHz, which prevails over previously reported MXene-based shields. Meanwhile, the developed eGMMF shows a remarkable piezoresistive sensing and anti-impacting performance. This work provides a new vision and guidance for editing both shielding and absorbing materials integrated with multifunctionality.
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
LANGMUIR
·
2024
·
IF 3.7
Jiajia Wan,Di Sun,Peng Li,Junjun Huang,Zhenming Chen
With the frequent increase and update of electromagnetic interference (EMI) shielding materials, a low-resolution material that can absorb most electromagnetic waves, thereby effectively reducing the secondary pollution, is urgently needed. However, the excellent performance, flexibility, and low cost of these methods are usually incompatible with current reports. To address the above dilemma, we reported a facile solution for fabricating a low-reflection and high-performance EMI shielding composite by means of electroless nickel plating (EP-Ni), electroless copper plating (EP-Cu), annealing, and coating with a polydimethylsiloxane (PDMS) polymer with the structure of a Ni@Cu tube encapsulated with PDMS. The results indicate that the active groups on vegetable wool can act as active sites for the absorption of the Pd catalyst, thereby catalyzing the reduction of Ni2+, Cu2+, and the subsequent deposition on the plant fiber surface. Notably, the Ni@Cu-encapsulated plant fibers decreased during annealing at 100 °C. According to the segregated network and synergistic effect of the porous structure, the as-fabricated EMI shielding material demonstrated high absorption and low reflection, in which the power coefficient of the T value was approximately 0.0001, the R value was about 0.1764 (a decrease of 27.5% compared that of EP-Ni cotton), and the A value was approximately 0.8235.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 8
·e70290
·
IF 0
Miao Zhang,Yutong Zheng,Tongyu Zhou,Xiyu Song,Jianhan Hong,Yu Wang
High-efficiency electromagnetic interference (EMI) shielding fabrics with strong absorption and low reflection characteristics are urgently demanded to address the increasing electromagnetic radiation pollution, but it is still challenging to integrate these features onto single fabric. Herein, an all-in-one asymmetric conductive structure was constructed on 3D polyester fiber-based spacer fabric through a successive in situ polymerization of polyaniline and followed by localized electroless Ni–P plating process. Thanks to the synergistic effect of microwave absorbing layer of low-conductivity polyaniline coating and shielding reflection layer of highly conductive Ni-P plating, the incident electromagnetic waves undergo a process of “absorption–reflection–reabsorption” and are dissipated as much as possible when they propagate into the composite fabric. The resultant composite fabric shows a superior EMI SE over 60 dB within 18–40 GHz, whereas the EMI SE from reflection is only 1.6 dB, and the average reflectivity is as low as 0.31, which indicates that 69% of electromagnetic waves are absorbed in the fabric. Interestingly, the porous structure of substrate and highly conductive Ni–P plating also endow this fabric with good thermal insulation and low infrared emissivity, resulting in an excellent infrared stealth performance. This study provides a facile and feasible approach for the development of high-efficiency and multifunctional EMI shielding fabric with low-reflection characteristics that holds great promise for application in civil and military fields.
研究领域:
材料科学
·
纺织工程
·
电磁学
✓ 已验证
产品关联
DOI
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
·
电磁学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Wei Zhang,Hengrui Wang,Siyi Ji,Yongqian Shi,Jiefeng Gao,Long-Cheng Tang,Pingan Song
In today's digital era, electromagnetic radiation pollution and fire hazard stand as a dual-edged sword, not only diminishing the efficacy of sophisticated electronic devices but also threatening human health. As a result, the pursuit of advanced electromagnetic shielding materials with high flame retardancy has ascended to the forefront of research priorities, underscoring their crucial role in mitigating these risks. In this study, pyrrole polymerization was employed to obtain a modified PPy-MXene, which was used to construct flame retardant modified MXene aerogel composites by the "Concreting" method. It was found that peak heat release rate, the total heat release, peak CO₂ production rate, peak smoke production rate and total smoke release of the C 1 M 2 MT FRs were reduced by 67.7 %, 46.7 %, 71.4 %, 71.7 % and 77.3 %, respectively. Furthermore, the average electromagnetic interference shielding effectiveness of C 1 M 2 MT FRs in the X-band and K-band reached 67.3 dB and 91.4 dB, respectively. It was noted that CMMT FRs had the ultra-low reflectivity (as low as 0.14). Additionally, the mechanical durability and strength of the aerogel composites were obviously enhanced, with compressive stress increased by a factor of 3.2, in comparison with that of the CNF aerogel.
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
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiemin Han,Yifei Ma,Mei Wang,Zhaomin Tong,Jonghwan Suhr,Liantuan Xiao,Suotang Jia,Xuyuan Chen
Black coatings benefit from low reflectance or high light absorption are utilized in multifarious optical applications. Due to their unique three-dimensional nanostructure and π-band optical transitions, vertical graphene (VG) has drawn great attention to the field of black coatings. However, how the morphology of VGs affects reflectance has not been comprehensively disclosed yet. In addition, the morphology of the substrate for VG growth also affects the absorption properties. Here, we report a nano-and micro-engineered VG/Ni structure based on VG and laser-modified nickel foil, which possesses omnidirectional low reflectance of ∼0.25% over the visible range. A larger spacing of graphene nanowalls is more conducive to the formation of light traps and improves the absorption property. Besides, the surface of nickel substrate by laser irradiation presents a “cauliflower-like” microstructure, which further enhances light-trapping ability.
研究领域:
材料科学
·
光学工程
·
纳米技术
·
表面工程
·
功能涂层
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Jianming Yang,Yujian Chen,Bo Wang,Yingguo Zhou,Xianzhi Chai,Xin Yan,Wei Han,Chen Liu,Peng Lin,Youyi Xia,Hexin Zhang,Xia Liao
Electromagnetic interference (EMI) shielding composites with gradient filler distributions were fabricated with the application of an induced magnetic field. The selective enrichment of nickel-coated carbon fibers within a core-shell structure effectively strengthens the overlap between fillers. This composite exhibited outstanding conductivities (98.2 S/m) that were two orders of magnitude greater than composites that possessed uniformly dispersed fillers because of the favorable inductive effect and the perfect loading of Ni nanoparticles . In addition, the sandwich structure causes the electromagnetic (EM) waves to reflect multiple times, further improving the EMI shielding effectiveness (SE) of the composite and resulting in a maximum SE of 60.8 dB. The introduction of magnetic Fe 3 O 4 @MWCNTs greatly increased the EM wave absorption efficiency from 14% to 45%, which resulted in low reflection peaks due to the resonant cancellation of the incident and reflected EM waves. The reflectivity of the composite was only 4% at 8.2 GHz, indicating a high absorption rate of 96% at this frequency. Furthermore, the composite shows excellent EMI shielding stability after 1000 repeated bends. This work thus describes a new approach to the preparation of high-performance (high-efficiency and low-reflectivity) EMI shielding materials and broadens their applicability to precision electronic devices and flexible wearable 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
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Lu Xu,Sheng Wan,Yanqing Heng,Sixin Wang,Jingjing Yang,Yubing Dong,Yaqin Fu,Qingqing Ni
Electromagnetic interference (EMI) shielding materials with low reflection features have become necessary for a new generation of electronic devices to reduce secondary electromagnetic pollution . Here, a novel strategy is adopted to provide flexible polydimethylsiloxane (PDMS) composite films with ultra-low reflection EMI shielding performance by constructing a double-layer structure with uniformly dispersed carbon fibres (CFs) in the upper layer as an impedance-matching absorption layer and continuous graphene fibres (GFs) located at the bottom layer as a conductive reflection layer. The resulting specific structure significantly reduces the reflectivity of the composite film at extremely low carbon conductive fillers (0.01 wt% CFs and 1.00 wt% GFs) through the process of “absorption-reflection-reabsorption” when incident electromagnetic waves (EMWs) pass through the composite film: the total shielding effectiveness ( SE Total ) achieves 34.4 dB at 18.0 GHz, while the shielding effectiveness of reflection ( SE R ) is only 0.1 dB, and reflection coefficient ( R ) is as low as 0.018. This phenomenon indicates that 1.8% of the incident EMWs are reflected in the propagation process when 99.96% are attenuated. In addition, the shielding mechanism of the double-layer EMI shielding composite films with low reflection features is studied in depth. This study provides a reliable idea for designing flexible EMI shielding materials with ultra-low reflection to alleviate secondary electromagnetic radiation pollution.
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
CARBON
·
2023
·
IF 10.9
Zheng Ma,Zhiming Deng,Xinfeng Zhou,Lulu Li,Chenyang Jiao,Huiling Ma,Zhong-Zhen Yu,Hao-Bin Zhang
Lightweight and multifunctional compressible aerogels with low reflectivity are highly demanded to protect electronic devices from increasingly serious electromagnetic interference and radiation. Although simply incorporating magnetic particles can reduce the strong electromagnetic (EM) reflection caused by the high conductivity of MXene , high density, inhomogeneous dispersion and weak interfacial interactions may impede the potential applications. Here, we report the fabrication of three-dimensional magnetic MXene/Fe 3 O 4 @acidified-MWCNT (aMWCNT) composite aerogel by a directional freezing and subsequent freeze-drying process, and the shielding effectiveness of composite aerogel can be tuned from 32.5 to 51.6 dB in the X- band. At the same time, since the Fe 3 O 4 nanoparticles are pre-decorated onto aMWCNTs, the heterogeneous interface polarization and magnetic loss are enhanced at low loadings. Therefore, the reflected power coefficient of the aerogel is as low as 0.31 with an ultra-light density of only 10 mg cm - 3 . Moreover, the good reversible compressibility , fatigue resistance , excellent heat insulation , and infrared stealth grant the aerogels great application prospects for anti-infrared detection and green shielding materials.
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
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Chunxia Tang,Jian Liu,Yifan Wang,Yunshan Mao,Kaishuang Zhang,Shaohai Fu
Most reported shielding materials exhibit reflection-dominated shielding mechanisms, which further leads to the secondary electromagnetic radiation contamination. This work reports a low reflective and scalable cellulose paper- based EMI shielding composite (ACMA) with a sandwich structure via assembling of the MXene containing aerogel layer, MXene coated paper (MP) layer, and highly conductive AgNWs/CNF film (AC) layer in a conductivity gradient. The shielding performances and mechanisms of each layer, AC-MP bi-layer, and AC-MP-aerogel tri-layer are investigated. Results show that the AC film could significantly increase the EMI SE of MP but produce super high R coefficient (0.92). The aerogel layer is effective in decreasing the R coefficient, which is correlated with its MXene content and thickness. The ACMA yields an average EMI SE of 71.46 dB and ultralow R coefficient of 0.1 in the X band when the aerogel has a MXene/BC of 90 % and a thickness of 2.6 mm. A large size ACMA is showcased, and it achieves an average EMI SE ranging from 56.82 dB to 75.85 dB in 2–18 GHz and an absorption- dominated shielding mechanism in 8–18 GHz. In addition, the ACMA also demonstrates excellent thermal camouflage property as the aerogel layer contacts the object.
研究领域:
材料科学
·
电磁功能材料
·
纳米复合材料
·
生物基材料
·
屏蔽技术
·
热伪装
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qing Zeng,Mengxi Han,Yifan Zhu,Qingyu Wu,Jianlin Zhou,Xinhua Hu,Bo You
Solar-control window film is an effective solution for reducing indoor cooling energy consumption. In this study, a modified 1T-phase molybdenum disulfide (M1T-MoS2)/phenolic resin composite film with low reflectivity, high imaging clarity and broadband optical blocking performance was developed. To enhance the dispersion of 1T-phase MoS2 nanosheets within the resin matrix, surface functionalization was achieved using trimethoxysilylpropanethiol (TOPE), exploiting the strong chemical affinity between thiol groups and sulfur vacancies. Furthermore, in situ curing of the phenolic resin facilitated dehydration condensation between silanol groups on the modified nanosheets and hydroxymethyl groups of the resin, resulting in the nanosheets being firmly anchored within the polymer network. The improved dispersion of the metallic-like M1T-MoS2 nanosheets allows the M1T-MoS2/phenolic resin film, with a thickness of only 40 μm and a filler content of 1.75 wt %, to achieve a light shading efficiency exceeding 85% for visible and near-infrared light below 1500 nm. Additionally, the film demonstrates high imaging clarity and a low visible-light reflectance of approximately 7%, contributing to the reduction of glare and light pollution caused by excessive reflection from window films. Experimental photothermal efficiency tests and finite element analysis demonstrated that the film’s high light-shading performance was primarily due to its strong optical absorption rather than reflection. This study presents an effective approach for fabricating broadband solar control window films and provides a strategy to enhance the stability of 1T-phase MoS2 in practical applications. These findings contribute to expanding the applications of 1T-MoS2 in composite materials and energy-related fields.
研究领域:
材料科学
·
纳米技术
·
光学
·
能源效率
·
聚合物复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Tian Mai,Lei Chen,Qi Liu,Zhong-Hui Guo,Ming-Guo Ma
To cope with the increasingly serious electromagnetic pollution, the demand for electromagnetic interference (EMI) shielding materials with low electromagnetic wave reflection ability has become urgent. Controlling electrical components, magnetic components, and designing the EMI material structure can effectively improve electromagnetic shielding performance, but this remains a significant challenge. Besides, extreme cold weather conditions also do considerable potential damage to the normal work of outdoor electronic equipment. Integrated light-to-heat conversion capability on electromagnetic shielding materials can further improve the stability and reliability of the equipment. Herein, the novel bilayer aerogels composed of zeolitic imidazolate frameworks derived hollow CoNi carbon nanocage/MXene Ti 3 C 2 T x /nanocellulose (BZMN) are prepared by a two-step freezing method. BZMN aerogels exhibit good EMI shielding effectiveness (SE) with low reflection coefficient (R coefficients): 35.1 dB (R coefficient = 0.28) and 21.2 dB (R coefficient = 0.25). The unique structures of bilayer aerogels demonstrate the ability to absorb more electromagnetic waves through interfacial polarization and multiple scattering. The green shielding index (g s ) of BZMN aerogels can reach 2.88. Moreover, BZMN aerogels show remarkable and unique light-to-heat conversion performance on different surfaces. Under 2.0 sun intensity, temperatures can reach 109.3 °C in the upper layer and 102.3 °C in the lower layer. Under 0.8 W cm −2 near-infrared (NIR) laser intensity, the temperatures can rise to 234.1 °C in the upper layer and 167.4 °C in the lower layer. In addition, the size and shape of BZMN aerogels can be customized according to the mold. These features present BZMN aerogels as advanced potential low reflection EMI shielding device candidates, useful for future telecommunication and electronic equipment protection.
研究领域:
材料科学
·
电磁工程
·
纳米技术
·
复合材料
·
能量转换
✓ 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）