Infrared stealth nanofibrous composites with thermal adaptability and mechanical flexibility

Fang, K.Y.; Wang, Y.J.; Zhao, Yuechao; Fang, Fei

doi:10.1016/j.compscitech.2020.108483

Cited by 32 publications

(13 citation statements)

References 35 publications

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“…In the three windows, PZA (H 2 O) had the lowest emissivity value (Figure a–c) and the average infrared emissivity is 0.39 in 8–14 μm band. This emissivity value is equivalent to that of litter and rock under sunlight, which can be well integrated into the environmental background …”

Section: Results and Discussionmentioning

confidence: 99%

“…This emissivity value is equivalent to that of litter and rock under sunlight, which can be well integrated into the environmental background. 33 Compared with PZ (H 2 O) and PA NFs, PZA (H 2 O) NFs showed lower infrared emissivity, which was attributed to the synergistic effect of ZAO nanosheets and Ag nanoparticles. The contact between Ag nanoparticles and ZAO nanosheets leaded to the formation of Schottky junctions (Figure S4), 34,35 resulting in the internal electric field.…”

Section: Methodsmentioning

confidence: 94%

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Multifunctional PAN/Al–ZnO/Ag Nanofibers for Infrared Stealth, Self-Cleaning, and Antibacterial Applications

Wang

Qiu

et al. 2021

ACS Appl. Nano Mater.

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With the development of modern infrared detection systems, military targets are more easily exposed, leading to the increasing risk of high-value targets being detected. Thus, stealth materials are highly desired to protect these targets. Additionally, stealth materials should expand their application scenarios to meet the growing performance requirements of military equipment. In this work, a polyacrylonitrile (PAN)/Al−ZnO/Ag nanofiber composite (PAN/ZAO/Ag) with three functions including infrared protection, antibacterial property, and self-cleaning was prepared by electrospinning, solvothermal, and electroless plating processes. The Schottky junction was formed due to the direct contact between ZAO nanosheets and Ag nanoparticles, leading the materials to possess the characteristic of plasmon resonance absorption of near-infrared light. In the thermal infrared imaging band of 8−14 μm, the infrared emissivity of the fiber was as low as 0.39, effectively blocking the target's thermal radiation. The composite membranes also achieved self-cleaning effect and synergistic antibacterial effect, with the maximum contact angle of 131.5°for water and 100% of antibacterial rate. In summary, this study provided a possibility for multifunctional infrared protective clothing materials to deal with the complex battlefield environment.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 94%

Multifunctional PAN/Al–ZnO/Ag Nanofibers for Infrared Stealth, Self-Cleaning, and Antibacterial Applications

Wang

Qiu

et al. 2021

ACS Appl. Nano Mater.

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“…When VO 2 NPs were incorporated in polyacrylonitrile fibers stealth mats were obtained. [206] The phase transition temperature was also tuned by doping the metal oxide NPs with tungsten embedded in Poly(vinylpyrrolidone) (PVP) fibers. [207] In general, however, the thermochromic effect can be more rigorously described with a change in the absorption properties in the visible range upon a variation of temperature (i.e., a color change of the material).…”

Section: Thermochromic Electrospun Fibersmentioning

confidence: 99%

Thermoactive Smart Electrospun Nanofibers

Liguori

Pandini²,

Rinoldi

et al. 2022

Macromol. Rapid Commun.

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The recent burst of research on smart materials is a clear evidence of the growing interest of the scientific community, industry, and society in the field.The exploitation of the great potential of stimuli-responsive materials for sensing, actuation, logic, and control applications is favored and supported by new manufacturing technologies, such as electrospinning, that allows to endow smart materials with micro-and nanostructuration, thus opening up additional and unprecedented prospects. In this wide and lively scenario, this article systematically reviews the current advances in the development of thermoactive electrospun fibers and textiles, sorting them, according to their response to the thermal stimulus. Hence, several platforms including thermoresponsive systems, shape memory polymers, thermo-optically responsive systems, phase change materials, thermoelectric materials, and pyroelectric materials, are described and critically discussed. The difference in active species and outputs of the aforementioned categories is highlighted, evidencing the transversal nature of temperature stimulus. Moreover, the potential of novel thermoactive materials are pointed out, revealing how their development could take to utmost interesting achievements.

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“…Moreover, since the infrared radiation intensity of the environment vary dynamically because of temperature, moisture, and solar intensity, infrared materials capable of emissivity modulation or the adaptive infrared stealth materials have aroused research interest in recent years. − Vanadium dioxide (VO 2 ) is one of the promising thermochromic materials for emissivity engineering applications. − Below the transition temperature ( T c ), VO 2 is in the insulating state and exhibits high infrared transmission. Above T c , VO 2 is in the metallic state and has high reflection efficiency in the infrared region. − In recent years, many efforts have been focused on improving the thermochromic effect of VO 2 for infrared stealth and radiative cooling through doping, − structural design, − and process optimization. , Liu et al , prepared the W-doped VO 2 thin films by the sol–gel method for adaptive infrared stealth.…”

Section: Introductionmentioning

confidence: 99%

“…The integrated devices have shown great potential in applications of sensors, detectors, and electromagnetic switches. However, VO 2 mainly works as an activation switch for resonance absorption in these research studies, without considering its emissivity modulation ability. − Nishikawa et al proposed a temperature-selective emitter consisting of W-doped thin VO 2 as the top layer, undoped VO 2 as the middle layer, and W as the bottom layer. The emitter shows a wide emissivity modulation range (0.2–0.45) between 25 and 100 °C.…”

Section: Introductionmentioning

confidence: 99%

Thermochromism Frequency-Selective Emitter for Infrared Stealth Application

Zhao

Fang

2021

ACS Appl. Electron. Mater.

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A thermochromism frequency-selective emitter (TFSE) capable of both emissivity modulation and radiative cooling is presented. The emitter integrates a metallic resonating component and the phase change material of vanadium dioxide (VO 2 ). In the atmospheric windows of 3−5 and 8−14 μm wave bands, the emissivity of the TFSE varies from 0.41 to 0.11 as the phase transition of VO 2 from the insulating to metallic phase takes place. In the atmospheric absorption band of 5−8 μm, the emitter can actively dissipate heat. Besides, the TFSE hardly shows any effect of incident angles on infrared emissivity. The resonant absorption behavior is analyzed via electromagnetic field distribution and further verified by an inductance−capacitance (LC) model. Based on the relationship between the resonance wavelength and metal disk diameter, the TFSE with multiple absorption peaks in the atmospheric absorption band is designed, which shows remarkable heat dissipation potential. The TFSE holds great potential in applications of adaptive infrared stealth technology and active management of radiative thermal energy.

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Infrared stealth nanofibrous composites with thermal adaptability and mechanical flexibility

Cited by 32 publications

References 35 publications

Multifunctional PAN/Al–ZnO/Ag Nanofibers for Infrared Stealth, Self-Cleaning, and Antibacterial Applications

Multifunctional PAN/Al–ZnO/Ag Nanofibers for Infrared Stealth, Self-Cleaning, and Antibacterial Applications

Thermoactive Smart Electrospun Nanofibers

Thermochromism Frequency-Selective Emitter for Infrared Stealth Application

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