The mass loss of spacecraft polyimide films under the action of atomic oxygen and vacuum ultraviolet radiation

Shuvalov, V. A.; Pis’mennyi, N. I.; Kochubei, G. S.; Tokmak, N. A.

doi:10.1134/s0010952514020063

Cited by 16 publications

(7 citation statements)

References 7 publications

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“…In particular, the harsh space environment such as ultra-high vacuum, atomic oxygen (AO), ultraviolet rays, proton (H ? ) irradiation and electron irradiation could severely weaken the lubricating property of lubricant materials used in the spacecraft [1][2][3][4], which can result in the spacecraft fault mainly arising from lubrication failure and fatigue wear of moving parts, and then maybe further brings disaster [5,6]. Therefore, it is very necessary to develop a kind of lubricant with excellent performance applied to the space system.…”

Section: Introductionmentioning

confidence: 98%

Tribological Performance and Lubrication Mechanism of Solid–Liquid Lubricating Materials in High-Vacuum and Irradiation Environments

Liu

Wang

et al. 2015

Tribol Lett

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In this paper, six solid-liquid lubricating materials have been prepared based on two kinds of liquid lubricants including perfluoropolyethers oil (PFPE) and chlorinated-phenyl and methyl-terminated silicone oil (CPSO) and three different solid lubrication materials [polyimide (PI), polytetrafluoroethylene and Cu-based alloy] by the dip-coating method. The tribological behaviors of these lubricating materials were comparatively investigated in high-vacuum condition. The results showed that the polymer-based solid-liquid lubricating materials exhibited the excellent tribological properties, which mainly attributed to the hydrodynamic lubrication. Moreover, as for the same solid substrate, the smaller the value of the steady-state contact angle was, the higher the friction coefficient was. Meanwhile, the effect of atomic oxygen (AO) and proton (H ? ) irradiations on structure and tribological properties of the PI/CPSO and PI/PFPE was further investigated in this work. The experimental results indicated that irradiations induced the degradation of the lubricating oil, which resulted in the increment of the friction coefficient and wear rate, thus decreasing the lubricating performance. In addition, the effect induced by H ? irradiation was more serious than that by AO irradiation. PI/ CPSO solid-liquid lubricating material has good irradiation stability compared with PI/PFPE.

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Section: Introductionmentioning

confidence: 98%

Tribological Performance and Lubrication Mechanism of Solid–Liquid Lubricating Materials in High-Vacuum and Irradiation Environments

Liu

Wang

et al. 2015

Tribol Lett

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“…[ 1–4 ] PI films are commonly used as the external layer in the multilayer insulator structures of thermal blankets used to protect spacecraft from the adverse conditions of low Earth orbit (LEO), including atomic oxygen (AO), ultraviolet (UV) radiation, space debris, and thermal cycling. [ 5,6 ] With the rapid development of the aerospace industry and the need to guarantee the safety and reliability of spacecraft, there is growing demand for PI films with improved mechanical properties and AO resistance. [ 7 ] Although PI films have excellent radiation and chemical resistance and superior thermal stability, such as other hydrocarbon‐based polymers, they are also highly susceptible to AO attack.…”

Section: Introductionmentioning

confidence: 99%

Double‐Layer Nacre‐Inspired Polyimide‐Mica Nanocomposite Films with Excellent Mechanical Stability for LEO Environmental Conditions

Pan¹,

Gao³

et al. 2021

Advanced Materials

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Owing to their outstanding comprehensive performance, polyimide (PI) composite films are widely used on the external surfaces of spacecraft to protect them from the adverse conditions of low Earth orbit (LEO). However, current PI composite films have inadequate mechanical properties and atomic oxygen (AO) resistance. Herein, this work fabricates a new PI‐based nanocomposite film with greatly enhanced mechanical properties and AO resistance by integrating mica nanosheets with PI into a unique double‐layer nacre‐inspired structure with a much higher density of mica nanosheets in the top layer. In addition, the unique microstructure and the intrinsic properties of mica also impart the nanocomposite film with favorable ultraviolet and high‐temperature resistance. The comprehensive performance of this material is superior to those of pure PI, single‐layer PI‐mica, and previously reported PI‐based composite films. Thus, the double‐layer nanocomposite film displays great potential as an aerospace material for use in LEO.

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“…Since the initial patent of polyimide (in 1955) and the commercialization of Kapton polyimide film (in 1961) by DuPont, aromatic polyimides have become very important because of their excellent thermal stability, good mechanical and electrical properties, and other outstanding specific properties . As one of the high performance polymers, polyimides are found a wide range of applications in many high‐tech fields, including spacecrafts, flexible displays, solar cells, an dmicroelectronic manufacturing . However, the fabrication of aromatic polyimides is nearly impossible through the melt or the solution process because they have no suitable flow properties or are insoluble in any organic media.…”

Section: Introductionmentioning

confidence: 99%

Polyimides with side groups: Synthesis and effects of side groups on their properties

Lee

Huang

Yan

2016

J. Polym. Sci. Part A: Polym. Chem.

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Polyimides are a class of well‐known high‐performance polymers combined the excellent mechanical, electrical, and thermal properties and widely applied in many high‐tech fields. Traditional polyimides can only be processed in the state of soluble intermediates with a hazardous step of cyclodehydration and elimination of a nonvolatile polar solvent. Therefore, a great effort has been devoted to the development of soluble polyimides that can be processed in the full imidation state. The incorporation of side groups into the polyimide backbone is an efficient approach to resolve above problems with a little sacrifice of its inherent merits. The subtle variation of side groups in polyimide backbones has allowed researchers to tune their final properties. In particular, some special side groups can endow polyimides the specific property or functionality to broaden their application fields. In this article, we summarize the synthesis of polyimides with side groups in recent 20 years and further discuss the effect of side groups on their physical and specific properties. The future research directions of polyimides with side groups are also discussed. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 533–559

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The mass loss of spacecraft polyimide films under the action of atomic oxygen and vacuum ultraviolet radiation

Cited by 16 publications

References 7 publications

Tribological Performance and Lubrication Mechanism of Solid–Liquid Lubricating Materials in High-Vacuum and Irradiation Environments

Tribological Performance and Lubrication Mechanism of Solid–Liquid Lubricating Materials in High-Vacuum and Irradiation Environments

Double‐Layer Nacre‐Inspired Polyimide‐Mica Nanocomposite Films with Excellent Mechanical Stability for LEO Environmental Conditions

Polyimides with side groups: Synthesis and effects of side groups on their properties

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