INFRARED PHYSICS & TECHNOLOGY
·
2018
·
IF 1.851
Honghan Bu,Guoyue Xu,Chuyang Liu,Tengchao Guo,Shujuan Tan
The green BCG/MgCl 2 /PEG-g-CDA powders were synthesized at different temperatures via liquid-phase reaction method. The microstructures of the synthesized powders were analyzed and characterized by FT-IR, XRD and ChemDraw software. The effects of synthesized temperatures on infrared emissivity properties of the powders in the wavelength range 3–5 μm were investigated systematically. It is found that the powders heated at 100 °C exhibit the optimum crystallinity at room temperature and thus show the largest variation (0.4) in infrared emissivity with the test temperature varying from 50 °C to 65 °C. Furthermore, the mechanisms for the self-regulated infrared emissivity properties are also explored thoroughly. The variation of infrared emissivity with temperature is ascribed to the changes in resistivity, which is induced by the transformation of PEG-g-CDA between crystalline and amorphous as well as the molecular structure transition of BCG between quinone and lactone. Our results suggest that BCG/MgCl 2 /PEG-g-CDA powders are potential candidates for intelligent infrared camouflage.
研究领域:
材料科学
·
光学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Pengda Han,Jiansen Zhao,Mengyu Jiao,Jiangtao Li,Linlin Guo,Shuo Yang,Xiaoxia Hu,Haiyan Du
The reaction or tight bonding between thermal insulation coating and the base ceramic fiber cloth is the main reason of the cloth embrittlement and failure. In this paper, the sacrificial interface layer is applied on aluminosilicate fiber cloth to inhibit the reaction between SiC-MoSi 2 -SiB 6 high emissive coating and the cloth. The sacrificial interface layer will be pyrolyzed at high temperature. The obtained space effectively prevents the glass formed by oxidation or melting of high emissive coating from contacting or reaction with the fibers in the cloth. The influence of different thickness of the middle layer and external coating on the micro morphology and mechanical properties of the fiber cloth was comprehensively compared and studied. The reusable performance of the coating was evaluated. The tensile strength of the fiber cloth with the optimized interface layer and external coating is about 40 MPa after heat treatment at 1300 °C for 1 h, which is 71.2% higher than that of the bare cloth; the tensile strength of the sample with only the outer coating and no intermediate layer is only 10 MPa after heat treatment at 1200 °C for 1 h. The bonding strength of the coating will not be obviously reduced by the application of sacrificial interface layer. By means of the interface layer the thermal shock resistance of the coating is improved. After 10 thermal shock cycles, the coating with a suitable interface layer is not cracking and spalling, and the bonding strength of it is as high as 125 kPa, the tensile strength is still as high as 20 MPa.
研究领域:
材料科学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Dinghan Wang,Tao Zhang,Xun Zhang,Yixiang Chen,Dan Yu,Wei Wang
With the development of infrared detection technology, to protect the exposure targets are more difficult than before. And traditional camouflage protection technologies have mainly focused on infrared stealth materials in fixed conditions by the adjustment of surface infrared emissivity or thermal insulation. However, with the increasing temperature of from engine, the risk of exposure possibility will greatly rise due to the change of emissivity and thermal insulation effect in reality. Hence, the development of intelligent infrared stealth materials that can respond to the temperature is an important tool for solving these problems. Here, we designed an infrared stealth fabric with macroscopic temperature-indicating adjustable emissivity, in which polyester fabric (PET) was used as the substrate, which was firstly modified with dopamine，3-thiolpropyltrimethoxysilane (KH-590) and N-isopropylacrylamide (NIPAAM)，by clicking on chemistry to obtain the temperature-responsive effect of the fabric material, and coated with vanadium dioxide (VO 2 ) powders in waterborne polyurethane (WPU). Importantly, the emissivity of the VO 2 coating layer will decrease with the increase of temperature from 0.95 to 0.68. Meantime, the fabric will shrink with the rising temperature, successfully forming a heat-insulating air layer between the composites and the target, thus further enhancing the IR stealth performance with the air layer thermal insulation. As we expected, when heated to 50 ℃, the surface temperature of the resulting fabric remains about 30 ℃. Therefore, this research on temperature response intelligent fabric based on the combined action of low infrared emissivity and heat isolation offers novel insights for high infrared stealth materials’ fabrication.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Xiaoxiao Yu,Yu Zhang,Xiaolei Nie,Wei Song,Lisha Chen,Haotian Li,Wanting Zhu,Danqi He,Mingrui Liu,Ping Wei,Wenyu Zhao,Qingjie Zhang
High infrared emissivity and excellent thermal conduction capability are crucial for the heat dissipation performance of heat dissipation coatings, which are applicable in the thermal management of modern electronic components. Herein, SiC nanowires/Edge-oxidized graphene/polyvinylidene fluoride hexafluoropropylene (SiC NWs/EOG/PVDF-HFP) composite coatings with three-dimensional thermal conductivity network structure were successfully prepared by the in-situ growth of SiC NWs between EOG layers through high-temperature carbothermal reduction reaction. The out-of-plane thermal diffusivity of the SiC NWs/EOG/PVDF-HFP composite coating was increased by 27 %, as compared with that of the EOG/PVDF-HFP coating, which was originating from the enhanced phonon conduction in the vertical direction by the in-situ growth of SiC NWs. The stacking faults and twin crystals generated by SiC NWs, the structural defects introduced by EOG, and the multi-scale surfaces and interfaces introduced by EOG and SiC NWs have jointly improved the infrared emissivity, enabling the SiC NWs/EOG/PVDF-HFP composite coating achieved an emissivity of 0.92. The copper plate coated with SiC NWs/EOG/PVDF-HFP coating achieved a temperature drop benefit of 9.3 °C, increasing by 126 %, 93 % and 78 %, respectively, as compared with that of the copper plate coated with EOG/PVDF-HFP coating, the copper plate coated with mechanically compounded SiC/EOG/PVDF-HFP coating, and the copper plate coated with mechanically compounded SiC NWs-EOG/PVDF-HFP coating. These findings highlight the great potential of the SiC NWs/EOG/PVDF-HFP composite coatings for application in the thermal management of 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
Polymers
·
2025
·Vol. 17
·期 15
·2110
·
IF 4.9
Yi Wang,Ze Wang,Tong Feng,Jiandong Chen,Enkai Lin,An Xie
Electrochromic devices (ECDs) capable of modulating both visible color and infrared (IR) emissivity are promising for applications in smart thermal camouflage and multifunctional displays. However, conventional transmissive ECDs suffer from limited IR modulation due to the low IR transmittance of transparent electrodes. Here, we report a reflection-type electrochromic zinc-ion battery (HWEC-ZIB) using a self-doped polyaniline nanorod film (SP(ANI-MA)) as the active layer. By positioning the active material at the device surface, this structure avoids interference from transparent electrodes and enables broadband and efficient IR emissivity tuning. To prevent electrolyte-induced IR absorption, a thermal lamination encapsulation method is employed. The optimized device achieves emissivity modulation ranges of 0.28 (3–5 μm) and 0.19 (8–14 μm), delivering excellent thermal camouflage performance. It also exhibits a visible color change from earthy yellow to deep green, suitable for various natural environments. In addition, the HWEC-ZIB shows a high areal capacity of 72.15 mAh cm−2at 0.1 mA cm−2and maintains 80% capacity after 5000 cycles, demonstrating outstanding electrochemical stability. This work offers a versatile device platform integrating IR stealth, visual camouflage, and energy storage, providing a promising solution for next-generation adaptive camouflage and defense-oriented electronics.
研究领域:
材料科学
·
电化学
·
光电子学
·
储能技术
·
国防技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Xinpeng Hu,Zhanjin Shi,Yi Zhao,Qinghong Ji,Xinlong Wang,Kang Zhou,Cheng Zhou,Binqing Quan,Hao Wu,Xiang Lu,Jinping Qu
Heat waves, increasingly frequent and intense, pose significant risks to social and economic activities. Thus personal thermal management based on typical petroleum-based fabrics such as polypropylene fabrics is gaining importance. To address these limitations of low latent heat, unsatisfied optical performance, and industrial production, a calcium alginate system was incorporated into a polypropylene matrix to form a secondary network that encapsulates phase change microcapsules (PCCs). This strategy effectively prevents PCCs from shedding while significantly enhancing the latent heat. Furthermore, the efficient incorporation of PCCs improved the optical properties of the obtained composites, with emissivity reaching 95.5 % and reflectivity increasing to 88.8 %. The enthalpy of the composite reached 132.2 J/g. Additionally, the composite demonstrated exceptional thermal performance, reducing temperatures by up to 11.2 °C (with an average reduction of 4.4 °C) during the day and 1.3 °C (average) at night. These results suggest that double-networked composite holds great potential for sustainable, energy-efficient thermal management and could pave the way for the development of innovative passive cooling materials and devices.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 5
·1754-1763
·
IF 6.4
Yang Xu,Gengping Wan,Lingling Ma,Ying Zhang,Yanran Su,Disheng Liu,Guizhen Wang
With the explosive development of modern military detection technology, stealth compatibility for materials with both outstanding microwave absorption (MA) and low infrared emissivity is urgently needed. In this paper, indium tin oxide (ITO) nanoparticles with high-efficiency MA and infrared stealth properties were successfully prepared by a steerable method using metal chloride salts as indium and tin sources, and the influence of tin proportion on their structure and properties was discussed. The prepared ITO nanoparticles possessing abundant carriers and defects are beneficial to construct a suitable conductive network, and the polarization process is enhanced by the existence of homogeneous and heterogeneous interfaces, so that strong absorption is generated. Remarkably, the obtained ITO with a single dielectric loss type can realize an effective absorption bandwidth (EAB) of 4.88 GHz with a matching thickness of 2.8 mm. In addition, ITO-5 has the lowest infrared emissivity (0.62) in the range of 3–14 μm, while ITO-10 exhibits the best infrared/radar compatible stealth effect. The lowest reflection loss and the widest EAB for ITO-10 are respectively −20.07 dB and 3.83 GHz, while the infrared emissivity is 0.64. Therefore, ITO shows a broad application prospect in anti-detection, and provides an option for multispectral compatible stealth materials.
研究领域:
材料科学
·
军事技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Shengwei Tang,Junlong Niu,Changle Gu,YuLin Liu,Rongzong Zheng,Xiaolong Weng,Chunyang Jia
In the development of polyaniline (PANI) based large-area broadband electrochromic devices, we employed a controlled deposition process using potassium polyvinyl sulfate (PVSK) as a template to regulate the morphology of PANI. This resulted in consistent spherical particle morphology and heightened electrochemical activity in PVSK-PANI films. The simple structure of PVSK, coupled with its similar IR absorption to polyethylene and sulfuric acid, mitigated any detrimental effects on the broadband electrochromic properties. In small-area (2 × 2 cm²) PVSK-PANI electrochromic devices, we observed maximum emissivity changes of 0.47, 0.51, and 0.49 in the 3-5 μm, 8-14 μm, and 2.5-15 μm ranges, respectively. Expanding our approach to large-area devices (20 × 20 cm 2 ), we achieved even more promising results. The PVSK-PANI based electrochromic devices achieved maximum emissivity changes of 0.55, 0.46, and 0.46 within the same spectral ranges of 3-5 μm, 8-14 μm, and 2.5-15 μm, respectively. Notably, these large-area electrochromic devices demonstrated a remarkable capacity to modulate infrared temperature by up to 10.4 °C at a background temperature of 70 °C.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Kai Feng,Zhengyuan Li,Yubo Liu,Xiaowei Pei,Yang Wu,Feng Zhou
The rapid advancement of modern surveillance technologies brings significant challenges in achieving effective concealment for personnel, weapons, and equipment. Various visible or infrared camouflage materials have been developed to date, yet the integration of both visible and infrared spectra to achieve dual-band camouflage remains highly desirable, particularly in complex and dynamically changeable environments. This study presents an iridescent electrochromic platform using an in situ polymerization of 3,4-ethylenedioxythiophene (EDOT) onto cellulose nanocrystals (CNCs) and followed by evaporation-induced self-assembly. The CNC–PEDOT platform exhibits tunable infrared emissivity by adjusting the in situ doping content of PEDOT in CNC. More importantly, the infrared emissivity of the CNC–PEDOT platform can be in situ adjusted from 0.32 to 0.90 via voltage regulation, while simultaneously, the visible light transmittance of the CNC–PEDOT shifts from 1 to 70%, which bestows the CNC–PEDOT platform with the capability for adaptive visible–infrared dual-band camouflage in dynamic environments. As a proof-of-concept, test objects such as soldier and tank models, or even the human body, can be concealed in the background environment, regardless of whether they are in high- or low-temperature environments, by adjusting the applied voltage. Additionally, under visible light conditions, the test objects can also be camouflaged among backgrounds like fallen yellow leaves or gray rocks by adjusting the bleached or colored state of the CNC–PEDOT surface. The electrically controlled camouflage functionality of the CNC–PEDOT electrochromic platform is suitable in dynamic real-world environments, which underscores its potential as a wearable and adjustable intelligent camouflage material.
✓ 已验证
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Yun Yang,Shujuan Tan,Gang Fang,Zhiyan Yang,Yongchao Li,Chaowen Yang
In high temperature environments, most low-emissivity coatings show monotonous and dull colors which make the visible-infrared compatible stealth still challenging. To achieve a wide range of color selection , in this work, three-dimensional (3D) SiO 2 –ZnO amorphous photonic crystals (APCs) are manufactured by electrodepositing Zn 2+ into 3D SiO 2 APCs, investigating the compatibility of adjustable structural color and low emissivity. A variety of structural colors could be easily obtained by modulating the diameter of SiO 2 nanospheres . In addition, the experimental parameters of spin-coating counts and electrodeposited time are studied to optimize the compatible performance of color and infrared emissivity. The results indicate that the doped ZnO effectively reduces the infrared emissivity in 3–5 μm waveband without changing the structural color of SiO 2 APCs. However, excess electrodeposited time of ZnO would cause the structural color faded gradually because of the increased refractive index and destroyed periodical structure. The adequate spin-coating counts is helpful for the bright structural color, but excess spin-coating counts would induce more defects in periodic structure and result in more absorption in 3–5 μm waveband. When the spin-coating counts and electrodeposition content of Zn 2+ in the SiO 2 APCs are properly modulated in this study, the SiO 2 –ZnO APCs can exhibit a good compatibility in desired structural color and low infrared emissivity (~0.4), as well as excellent thermal stability. This study provides a new approach for the design of multi-spectrum compatible stealth materials.
研究领域:
材料科学
·
光子学
·
红外技术
·
隐身材料
·
纳米材料
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2012
·
IF 2.103
Yunxia Zhu,Yuming Zhou,Tao Zhang,Man He,Yongjuan Wang,Xiaoming Yang,Yong Yang
Lactate-intercalated Co–Fe layered double hydroxides (LDHs) were successfully prepared by coprecipitation and hydrothermal method. In this process, divalent metal ions as precursors can be obtained from the reduction reaction of lactic acid and metal powder (cobalt and ferrous). In order to obtain Fe 3+ , H 2 O 2 (30%) was used to oxidize Fe 2+ . Meanwhile, the produced lactate was intercalated into the LDHs interlayers to compensate the positively charged layers. The as-synthesized LDHs were studied by element chemical analysis, powder X-ray diffraction (XRD), FT-IR spectroscopy, thermogravitry (TG) and differential scanning calorimetry (DSC), TEM. The results indicated that the basal spacing value of the LDHs was larger than that of lactate-intercalated Mg–Al or Zn–Al LDHs. It proved that the lactate anions were inserted into the gallery in the form of dimers which made it easy to be delaminated in water. The obtained nanosheets were deposited on the substrates to form the film which was characterized by TEM and AFM, and infrared emissivity value (8–14 μm) was also investigated. The infrared emissivity values of Co–Fe LDHs were lower than that of Zn–Al which took advantage of the special electronic structure in Co and Fe. Besides, the orderly structure and the reduction of the interfacial deficiency of the film made the values further reduced.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2020
·
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
危险品化学品经营许可证（带存储）