CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Dong-Xue Xia,Xin Wang,Wen-Qi Sun,Rui-Lian Lin,Jing-Xin Liu,Ying-Wei Yang
Inspired by Chameleons' skin color tuning in response to environmental changes, we design and prepare three inclusion complexes based on the cucurbit[7]uril (Q[7]) host and three viologen guests. Upon light irradiation, the colors of these inclusion complexes in the solid state turn from light colors to vivid three primary colors, i.e., red, green, and blue, respectively. Ultraviolet–visible (UV–vis) diffuse reflectance and electron spin resonance (ESR) spectra reveal that the photochromism can be attributed to the generation of viologen radicals, originating from the photoinduced electron transfer. The results of quantum chemical calculation indicate that Q[7] in the inclusion complexes acts as the electron donor in the photoinduced electron transfer process. Using a color mixing approach and finely manipulating the proportions of the three inclusion complexes, a series of composite photochromic materials (CPMs) can be manufactured, covering a full-color gamut in visible light. On the other hand, due to the ignorable size and shape change of CPMs during the photochromatic processes, the CPMs-based reversible photochromic “printing” and photofading “erase” properties were also used for quick response (QR) code. Therefore, these prominent intelligent features of CPMs open new avenues to explore optical regulated nano-platforms for multiple anti-counterfeiting, biomimetics, and military camouflage applications.
研究领域:
材料科学
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化学
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仿生学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
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IF 6.3
Kaiwen Lin,Changjun Wu,Yunxu Zhou,Jingze Li,Xiaoli Chen,Yuehui Wang,Baoyang Lu
Modern military operations usually require adaptable camouflage across multiple terrains, which prompted us to design and synthesize an electrochromic polymer named P (8,8'-(2,2′-dimethyl-9,9′-spirobi [fluorene]-7,7′-diyl)bis (3,3-bis(((2-ethylhexyl)oxy)methyl)-6-methyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dihydropine)) (PSBF-ProDOT) via direct (hetero)aromatic polymerization (DHAP). PSBF-ProDOT exhibits a yellow-green-blue-violet multicolor change at specific voltages, and its colors blend well with desert, grassland, wilderness, lake, and ocean environments, which hold promising application prospects in the field of military camouflage. Additionally, PSBF-ProDOT features fast response times (1.8 s for oxidation and 3.1 s for reduction), moderate coloration efficiency (80.7 cm 2 C −1 at 424 nm), and low initial redox potential (1.08 V/−1.03 V), meeting the requirements for camouflage devices. Here, we present a deformable and simple dynamic military camouflage electrochromic device (DMCECD) based on PSBF-ProDOT. This device achieves camouflage by changing its color to adapt to the surrounding environment, which is controlled via a Bluetooth app on a smartphone. By fine-tuning the voltage with an accuracy of 0.1 V, we can control the color changes of the dynamic military camouflage device to harmonize with specific environmental hues, ensuring optimal concealment. The integration of the Bluetooth module, printed circuit board, and electrochromic component underscores the innovative potential of electrochromic technology in the field of dynamic military camouflage, illustrating the prospective applications for future dynamic camouflage. We believe that our work will further advance the exploration of dynamic military camouflage and broader multifaceted wearable display technologies.
研究领域:
材料科学
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军事技术
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Xiaojing Lv,Juncheng Dong,Mingfa Shao,Jin Li,Jiankun Cui,Yufeng Shi,Yang He,Mi Ouyang,Cheng Zhang
Electrochromic (EC) technology, with its reversible color changes and special light modulation, has a wide range of applications in adaptive military camouflage. However, there are still some problems such as difficulties with multicolor display, flexible patterned displays, and difficult integration with electrochromic and energy storage that limit its development and applications in portable military camouflage devices. In this work, a multicolored conjugated polymer, p3DT-FSQ, was designed and prepared by electrochemical polymerization. The polymer film exhibits a reversible color change, high optical contrast, and a fast switching time. On this basis, the reflective and transmissive zinc-based electrochromic devices (RZECD and TZECD) were optimally assembled based on the p3DT-FSQ film as the EC layer and zinc sheet or zinc frame as the counter electrode. Both RZECD and TZECD show reversible orange-yellow, earthy yellow, and army green colors at various potentials with good energy storage properties and excellent flexibility, meeting the demand for color variation and functionality in modern electronic combat environments. It is even more intriguing that the patterned TZECDs can accurately simulate six combat environments, including Gobi, highland, wilderness, cropland, desert, and forest. This work presents a design strategy for an adaptive EC military camouflage device that also has an energy storage function, making it an excellent choice for portable adaptive military camouflage.
研究领域:
材料科学
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能源技术
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军事应用
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2022
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IF 7.336
Junlong Niu,Jiaqiang Zhang,Yi Wang,Lei Hu,Shengwei Tang,Zhongquan Wan,Chunyang Jia,Xiaolong Weng,Longjiang Deng
Multifunctional electrochromic devices with diversified functions are highly desirable for intelligent electronic systems compared to conventional electrochromic devices with sole applicability. Herein, a multifunctional electrochromic device integrated with variable optical, thermal management and energy storage is realized by preparing nanowire‐structured coral-like PANI films on a flexible gold-plated membrane through the combination of galvanostatic and cyclic voltammetric electrodeposition techniques. The multifunctional electrochromic devices achieve reversible color changes between brownish-yellow, green and dark-green. The maximum emissivity changes of the multifunctional electrochromic device in the ranges of 3–5 μm, 8–14 μm and 2.5–15 μm are 0.42, 0.49 and 0.47, respectively. Moreover, a specific capacitance of 355 F g −1 is obtained for the multifunctional electrochromic devices at a current density of 1 A g −1 . The multifunctional electrochromic devices also have such advantages as light-weight, thin-thickness, flexible and can be fabricated in a multipixel and large area. With versatility characteristics, the multifunctional electrochromic devices are highly promising for intelligent electronic systems in electronic clothing, military camouflage and thermal control system of spacesuits.
研究领域:
材料科学
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电化学
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纳米技术
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能量存储
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热管理
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智能纺织品
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军事技术
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航天技术
✓ 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）