Improvement of spacecraft white thermal control coatings using the new synthesized Zn-MCM-41 pigment

Kiomarsipour, Narges; Razavi, Reza Shoja; Ghani, Kamal

doi:10.1016/j.dyepig.2012.08.019

Cited by 43 publications

(10 citation statements)

References 9 publications

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“…As a case in point, satellite electronics working in the sun shade of space environment, its thermal remove ability q can be simplified as

q = ϵ σ false(T_{d}^{4} - T_{s p c}^{4} false)

, where σ is the Stefan‐Boltzmann constant with 5.67 × 10 −8 W/m 2 K 4 , T d is the surface temperature of electronic device, T spc is the space background temperature with 4 K, and ϵ is the emittance. As for OSR and ZnO white paint, their emittance is, respectively, set as 0.8 and 0.9, while the emittance value of FTF with 70 wt% NPs in Figure is used to calculate its heat remove capacity.…”

Section: Resultsmentioning

confidence: 99%

Flexible thermochromic foil derived from fine perovskite nanoparticles with excellent energy‐saving performance

et al. 2019

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Summary Thermochromic manganite represents a promising energy‐saving material individualizing tunable emittance via external stimuli to manipulate thermal radiation and automatically regulate temperature. However, the ceramics fabricated from the manganite are commonly hard and brittle, which make the fabrication of their flexible device very difficult. Here, large‐scale thermochromic foils (TFs) prepared via manganite nanoparticles (NPs) and polyimide (PI) is flexible with thermal emittance self‐adjusting from 0.31 to 0.77 upon heating, which the emittance is enhanced by 148%. Especially, the emittance increases dramatically with temperature till 293 K, followed by a leveling off. It is suggested that the PI transparency and the filling ratio of NPs are two important parameters to optimize the thermochromic properties of TFs. Our experiment demonstrated that TFs fabricated with the fluorinated PI can save at least 61% energy consumption versus the existed optical surface mirror at low temperature. The flexible TFs has good prospects for application in smart thermal management.

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“…As a case in point, satellite electronics working in the sun shade of space environment, its thermal remove ability q can be simplified as

q = ϵ σ false(T_{d}^{4} - T_{s p c}^{4} false)

Section: Resultsmentioning

confidence: 99%

Flexible thermochromic foil derived from fine perovskite nanoparticles with excellent energy‐saving performance

et al. 2019

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“…To limit the temperature rise for spacecraft surfaces, which may affect thermal balance and heating power consumption of units/instruments, coatings with high reflectivity in the solar spectrum and high emissivity in the infrared range are applied on the surface of so‐called radiators. These parameters (the beginning‐of‐life and end‐of‐life values) are the drivers for the design of coatings for thermal control . Such coatings need to be stable in terms of their chemical composition, as well as optical and mechanical properties.…”

Section: Spacecraft Applications Of Coatingsmentioning

confidence: 99%

Coatings and Thin Films for Spacecraft Thermo‐Optical and Related Functional Applications

Hołyńska

Tighe

Semprimoschnig

2018

Adv Materials Inter

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An overview of coatings and thin films for spacecraft applications is provided, focusing on coatings for thermal control and optical applications. An outline of the requirements imposed by the harsh conditions in space is given. Space applications of coatings are listed and their qualification is described, including testing in the ESA laboratories at ESTEC. Coatings degradation in space and environmental testing, including degradation due to vacuum, thermal cycling, radiation, atomic oxygen, space debris, and outgassing effects, is covered in detail. Recent advances in the field and perspectives for future development are also reviewed based on the published literature.

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“…The peak at 1612 cm -1 belongs to -CH 3 vibrations from the surfactant of zinc acetate and it becomes remarkable after thermal treatment 18 . The band from 1260 to 1006 cm -1 represents Si-O-Si functional group; the peaks in 988 cm -1 and 760 belong to Si-OH and Si-O vibrations from the mesoporous MCM-41 19 . IR spectra of ZnO show that absorption peaks in the range 600-400 cm -1 , indicating the formation of ZnO nanospheres assembled microspheres 18,20,21 .…”

Section: Ir Characterizationmentioning

confidence: 99%

Synthesis and Characterization of ZnO-Ag Nanoparticles Supported on MCM-41 as Photocatalyst

Barrera-Rendón¹,

Jiménez-Becerril²,

García-Rosales³

2017

Orient. J. Chem

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Development of photocatalyst is a key step for separation of photocatalyst to solution supported materials. ZnO-Ag/MCM-41 nanoparticles synthetized by a wet process were studied as photocatalysts in the Congo red photodegradation, which is a water contaminant. Also were used prepared zinc oxide, commercial zinc oxide, silver doped zinc oxide, Mobil Catalytic Material No. 41, zinc oxide supported on MCM-41, and commercial zinc oxide supported on MCM-41. All systems were characterized by SEM, FTIR, XRD, and surface area by BET and tested in photocatalytic degradation of Congo red. It was found that the systems showed the crystalline phase wurtzita for ZnO, and a main amorphous component for MCM-41, ZnO/MCM-41 and ZnOC/MCM-41. The materials had different particle size and morphology; however, predominantly spherical nanoparticles (less than 100 nm) were found. For photocatalytic UV irradiation a maxima degradation of 30% for 120 min was reached with a ZnO-Ag as catalyst.

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Improvement of spacecraft white thermal control coatings using the new synthesized Zn-MCM-41 pigment

Cited by 43 publications

References 9 publications

Flexible thermochromic foil derived from fine perovskite nanoparticles with excellent energy‐saving performance

Flexible thermochromic foil derived from fine perovskite nanoparticles with excellent energy‐saving performance

Coatings and Thin Films for Spacecraft Thermo‐Optical and Related Functional Applications

Synthesis and Characterization of ZnO-Ag Nanoparticles Supported on MCM-41 as Photocatalyst

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