ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 16
·2300389
·
IF 3.6
Xiaochang Xing,Lingling Wu,Xiaoyong Tian,Dichen Li
Objects can be identified based on their distinctive scattering signatures in multiple physical areas such as optics, electromagnetics, and thermotics. To ensure comprehensive stealth and camouflage capabilities, antisense devices with multiphysical field coupling are highly desired. Herein, a multifunctional antisense metadevice that achieves stealth in the microwave band while also generating multiple camouflage images from the original object's position during the heat conduction process is proposed and demonstrated. The metadevice combines both antimicrowave detection and camouflage infrared imaging capabilities, resulting in broadband electromagnetic stealth and thermal camouflage effect. Experimental and simulation results confirm the metadevice's ability to achieve these multifunctional capabilities in temperature-dependent cases. The development of such multifunctional devices that span physical fields provides new avenues for the design and preparation of multifunctional structures.
研究领域:
电磁学
·
热传导
·
材料科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Tao Liang,Gang Peng,Xiangzhe Zhang,Yuehua Wei,Xiaoming Zheng,Wei Luo,Mengyan Dai,Chuyun Deng,Xueao Zhang
Two-dimensional materials with optical turnability have wide prospect in related applications such as electrochromic coating and thermal camouflage. Here we report a Li-intercalated ultrathin graphite device with tunable visible-near-infrared reflectivity . After Li-ion intercalation, the Fermi surface of ultrathin graphite will move to a higher level, which prevents the interband optical transitions below it. Therefore, it is possible to change the absorptivity or emissivity of ultrathin graphite through reversible Li-ion intercalation, which accomplishes the modification to reflectivity indirectly. In our experiment, the strong fluorescence background and Peak shifts in Raman spectra , as well as the enlarged layer spacing in XRD spectra, together confirmed that Li-ions were successfully intercalated into the graphite layers. The relative reflectivity of ultrathin graphite increased sharply in a wide range from 460 nm to 1500 nm after complete Li-ion intercalation. At a typical near-infrared wavelength 1500 nm for instance, the relative reflectivity is 0.28 for pristine graphite while 0.70 for fully lithiated graphite. Such reversible intercalated modulation in visible-near-infrared reflectivity of ultrathin graphite might provide a new way to design electrochromic coating, thermal camouflage or radar stealth systems, which also promotes further understanding and optical applications of graphene and other 2D materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 5
·1-9
·
IF 23.2
Shen Yong,Li Guojie,Cheng Yajie,Li Yahong,Alhadhrami A.,Fallatah Ahmed M.,Alshammari Dalal A.,Zhou Bing,Feng Yuezhan,Liu Chuntai
Developing a multifunctional protection material compatible with infrared (IR) stealth and electromagnetic interference (EMI) shielding is urgently required but challenging to ensure special human safety and maintain the smooth operation of electronic equipment. Herein, it is designed and fabricated a double-layered ANF/MXene film containing a thermally insulated aramid nanofiber (ANF) aerogel and low emissivity MXene coating with integrated long-term thermal camouflage at elevated temperatures and highly efficient EMI shielding capability. In this system, the lower aerogel film can act as a barrier to insulate heat transfer through its novel skin–core structure under ultralow directional thermal conduction, while the upper Ti 3 C 2 T x MXene coating can provide a very low emissivity surface and highly conductive network. Owing to its unique double-layer structure, the ANF/MXene film demonstrates a significant EMI shielding effectiveness of 43.6 dB and a remarkably low emissivity of 0.24, delivering excellent IR stealth performance across various ambient temperatures. This research lays the foundation for the creation of versatile protective materials that have great potential for use in both military and civilian contexts.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Hongfeng Yu,Junru Yao,Jinlong Lv,Ruirui Zhang,Zi Wang,Xiangjia Song,Xiangfei Wei,Jintang Zhou
Developing lightweight, high-performance microwave absorbing materials with multiple functions has become a major challenge in the field of electromagnetic protection. In this study, ZIF-67/cellulose nanofiber (CNF)-derived Co–C/C aerogel with an integrated design for microwave absorption and thermal camouflage functions was prepared. The hierarchical pore structure with coexisting micron-scale skeletal pores and MOF-derived nanopores was constructed through in-situ growth of ZIF-67 on CNF and low-temperature carbonization regulation. Simultaneously, uniformly distributed Co nanoparticles (20–30 nm) and defect-rich graphitized carbon heterointerfaces were obtained. The Co–C/C aerogel exhibited an ultra-low density (16.21–17.35 mg/cm 3 ). In terms of microwave absorption, it achieved an effective absorption bandwidth of 6.87 GHz (covering the Ku band) at a thickness of 2.4 mm. This was attributed to the synergistic mechanisms of multiple scattering from hierarchical pores, enhanced interfacial polarization induced by low-temperature carbonization, and magnetic loss from Co nanoparticles. In addition, the material demonstrated a low thermal conductivity of 0.0492 W m −1 K −1 , and infrared imaging revealed its significant thermal signal shielding capability. This study addressed the issues of structural collapse and functional singleness in traditional MOF-derived materials through in-situ growth and low-temperature carbonization strategies, providing new insights for the design of lightweight, broadband, and multifunctional stealth materials.
研究领域:
材料科学
·
电磁学
·
热管理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Huan Liu,Lingyu Li,Xinxin Tian,Xiaodong Wang
To meet the requirement of multipurpose applications in infrared thermal camouflage and solar photothermal energy storage, we have developed a series of multifunctional composite films based on polyurethane (PU) as a flexible matrix and double-layered phase-change microcapsules as an additive. The double-layered microcapsules were first constructed by encapsulating n -docosane as a phase-change material in a titanium dioxide shell, followed by depositing a polyaniline (PANi) functional layer. Then, the microcapsules were incorporated into the PU matrix to form the composite films through in situ polycondensation . A high latent heat capacity of over 130 J g −1 was achieved by the microcapsules as a result of a high n -docosane loading. This can generate an effective thermal buffer for the composite films and thus endow them with a good thermal camouflage capability. The composite films also show good solar energy-storage performance thanks to their superior sunlight absorptivity derived from the PANi coating layer of the microcapsules. The composite films present a much higher surface temperature (68.6 °C) than pure PU film (41.9 °C) under simulated sunlight irradiation for 1488 s. In addition, the composite films exhibit a self-cleaning surface and high flexibility. Integrating the double-layered microcapsules and flexible PU matrix may provide an innovative strategy for developing flexible functional films for infrared thermal camouflage and photothermal energy storage applications .
研究领域:
材料科学
·
能源存储
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zhiyu Huang,Aixin Tong,Tonghe Xing,Annan He,Yuxin Luo,Yu Zhang,Mengqi Wang,Sijie Qiao,Zhicheng Shi,Fengxiang Chen,Weilin Xu
Camouflage clothing and cloaks are widely used in the military field. However, the widespread use of unmanned aerial vehicles (UAV) equipped with infrared thermal imaging devices has rendered traditional camouflage ineffective in the face of its unparalleled detection capabilities in modern warfare. Inspired by the enhancement principles of cellulose and lignin in natural wood, the interfacial engineering of biomineralization, and the scale structure of pangolins, herein, a regenerated cellulose/lignin composite aerogel with a toast-like structure by integrating all three biomimetic techniques into a single biomimetic design is developed. The unique toast-like structure allows effective protection of the internal porous structure during surface modification. The prepared composite aerogel not only exhibits excellent mechanical properties but also demonstrates a desert sand-like color, superior thermal insulation, and effective infrared blocking capabilities, highlighting its potential in thermal camouflage applications. This work proposes a green method for preparing regenerated cellulose composite aerogel sheets, which is expected to provide a design concept for the preparation, functionalization, and application of regenerated cellulose aerogel materials. In addition, factors such as the generalizability of the study, environmental impacts, and economic benefits are discussed.
研究领域:
材料科学
·
仿生学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Device
·
2023
·
IF 0
Huaxu Qiao,Zhequn Huang,Jianming Wu,Jie Shen,Heng Zhang,Qixiang Wang,Wen Shang,Wei Tang,Tao Deng,Hongxing Xu,Kehang Cui
Summary Global climate change and high energy costs pose urgent demands in the development of low-cost, passive thermal-regulation technologies. Despite intensive efforts invested, high-efficacy, all-season temperature regulation on real-world objects has not yet been achieved through truly passive, reliable structures. We propose and experimentally realize a Janus thermal cloak (JTC) composed of an all-ceramic, radiative-cooling phononic metafabric facing the sky and a photon-recycling foil facing indoor space. The phononic metafabric, which supports broadband hyperbolic phonon polaritons (HPhPs) and strong scattering of phonon transport, shows outstanding resilience under harsh thermal, mechanical, and corrosive environments . Field tests on electric vehicles (EVs) show that the JTC realizes daytime sub-ambient cooling by 8.0°C (by 27.7°C compared with non-covered EVs) in summer and nighttime supra-ambient warming by 6.8°C in winter. The JTC does not involve dynamic phase change or moving parts and thus is promising toward practical applications in buildings, vehicles, and extraterrestrial environments.
研究领域:
材料科学
·
热力学
·
光学工程
✓ 已验证
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Hongxin Tan,Jingren Gou,Xin Zhang,Li Ding,Haihui Wang
The electromagnetic interference (EMI) shielding abilities of MXene-based conductive nanocomposites are promising for ensuring the steady operation of electronic equipment and protecting people from electromagnetic radiation. The development of comprehensive membranes that satisfy all the essential requirements of excellent EMI shielding and infrared (IR) stealth performance remains a significant issue, despite the high EMI shielding capabilities of MXene-based composite membranes . Here, we report a sandwich-structured Ti 3 C 2 T x -MXene/reduced-graphene-oxide (MrG) membrane with high conductivities and abundant interior blowholes for high-performance EMI shielding and IR stealth. Taking advantage of the continuously conductive routes and distinctive porous structures, an 18-μm-thickness MrG membrane shows a high EMI shielding efficiency (EMI SE) of 89.1 dB and a satisfactory absolute EMI SE ( S S E /t) of up to 55282.8 d B ⋅ c m 2 ⋅ g − 1 , which is the best result for MXene-based nanocomposites with similar thickness. Moreover, the MrG membrane also exhibits superior thermal camouflage ability for objects in low-temperature circumstances (like winter) and high-temperature cases (like summer), demonstrating the great promise as high-performance EMI shielding membranes for IR stealth, security protection, and counter-surveillance.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Xuhui Chen,Ya Yi,Ruoxuan Duan,Canhui Lu,Zehang Zhou
Lightweight and porous conductive aerogels have demonstrated great potential in electromagnetic interference (EMI) shielding and thermal camouflage, while the poor mechanical properties and structural stability usually limit their applications. Herein, vertically oriented and physically/chemically dual cross-linked Ti 3 C 2 T X MXene/polyvinyl alcohol (PVA) composite aerogel is prepared by ice-templated unidirectional freezing process and subsequent glutaraldehyde (GA) treatment. GA induced covalent crosslinking leads to the significantly enhanced structural stability and mechanical strength of the resultant MXene/PVA composite aerogels, which also endows them with desirable flame retardancy. The honeycomb-like structure of the composite aerogel contributes to its good anisotropic absorption-dominated EMI shielding performance over an ultrabroadband frequency range (8.2–40 GHz) with a low MXene content of 3.81 vol%. Furthermore, the excellent thermal insulation properties and low infrared emissivity of the highly oriented arranged MXene sheets bring the composite aerogel promising applications in thermal camouflage. Therefore, the lightweight and robust MXene/PVA composite aerogel demonstrates great potential in multi-scenario applications as a high-performance multifunctional EMI shielding material.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ming-hua Cheng,Xiang Xu,Hao-wen Zhang,Si-yu Kong,Zhe-sheng Feng,Fanbin Meng,Yan Wang
With the development of wearable devices, flexible multifunctional electromagnetic shielding (EMI) shielding materials have attracted widespread attention. In this paper, a fibrous ANF/PPy composite material was obtained by modifying aramid nanofibers (ANFs). Subsequently, the Ti 3 C 2 T x (MXene) suspension was mixed with the ANF/PPy solution, electrostatic self-assembly was performed, and an ANF/PPy/MXene composite film with a “brick (MXene)-mortar (ANF/PPy)” structure was prepared through vacuum-assisted filtration. The film has high electrical conductivity, certain mechanical tensile properties, high mechanical stability, good chemical stability, and excellent long-term stability. In addition, the film with a thickness of only 16 μm shows excellent EMI shielding (average EMI SE is 40.4 dB, absorption coefficient is 0.155, SSE/t is 36288.6 dB·cm 2 /g), dual‑driven (electrothermal and photothermal convertibility) heating and infrared thermal camouflage performance (radiation temperature is 69.4°C at a temperature of 150°C). These results show that ANF/PPy/MXene composite film is very promising in practical applications such as wearable devices, communications, high-performance heating, and infrared stealth.
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
Advanced Fiber Materials
·
2023
·Vol. 5
·期 6
·2080-2098
·
IF 16.1
Yan Biaobiao,Bao Xueming,Gao Yilei,Zhou Man,Yu Yuanyuan,Xu Bo,Cui Li,Wang Qiang,Wang Ping
Two-dimensional transition metal carbide/nitride (MXene)-based textiles have been developed in many fields; however, the high sensitivity to oxidation and weak interfacial bonding hinder their applications. Herein, we present a strategy for the preparation of a highly antioxidative MXene@gallic acid (MXene@GA, MG) hybrid dispersion, and further covalently grafted it onto carboxylated cotton fabric through interaction with metal ions (Fe 3+ ) for fabricating wearable multifunctional textiles. Due to the cross-linking effect of Fe 3+ and the remarkable antioxidant activity of natural polyphenol GA, the MG coatings firmly adhere to the textile surfaces and can withstand conventional washing, exhibiting favorable service stability and potential application prospects. Moreover, the obtained MG-decorated textile has the inherent characteristics of good breathability, moisture permeability, flexibility, and biocompatibility of the original fabric, which are conducive to the wearability of smart devices. Furthermore, by utilizing the outstanding conductivity (~ 330 S/m) and photothermal convertibility of the MG coating, the functional textile achieves high electromagnetic interference (EMI) shielding efficiency (~ 35 dB), excellent dual-driven ( Joule and solar) heating warmth retention, and infrared thermal camouflage. Due to the green and scalable preparation process, favorable durability, excellent comfort, and multifunctionality, the MG-decorated textiles are anticipated to be promising candidates for the next generation of smart wearable personal protective clothing. Graphical Abstract
研究领域:
材料科学
·
纺织工程
·
智能可穿戴设备
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 28
·2201906
·
IF 19.924
Wei Wu,Liping Tong,Han Zhou,Tongxiang Fan
Low infrared emissivity materials play a key role in thermal camouflage or retardation. Among these, fillers can be easily shaped into various flexible forms and normally provide an omnidirectional and polarization-insensitive emissivity. However, conventional fillers suffer from drawbacks of full-waveband ultrahigh reflectivity, unsatisfactory thermal camouflage performances, or poor chemical/thermal stabilities. Herein, 2D MoSe 2 is discovered as a new semiconductor with intrinsic low infrared emissivity after first-principle density functional theory calculation and experimental demonstration on eight types of two-dimensional materials (2DMs). Mechanisms of electron–photon reflection and phonon–photon absorption for the low infrared emissivity are proposed. A two-step microwave-assisted amination process is developed to exfoliate the nanosheets and obtain a desired low infrared emissivity. The as-obtained chitosan modified MoSe 2 (CS@MoSe 2 ) has an ultrahigh spectral reflectivity of 78%–86% in 8–14 µm, and its resin-based coating still exhibits a low infrared emissivity of 0.32 and shows a dramatic reduction in radiation temperature of 28 °C for a hot object at 70 °C. Besides, CS@MoSe 2 can endure a high temperature of 220 °C and is demonstrated with a long-term thermal camouflage efficiency in hot environments. This work will guide 2DMs selection and preparation toward desired infrared radiation properties to satisfy numerous applications.
研究领域:
材料科学
·
纳米技术
·
热力学
·
表面化学
✓ 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）