The Surface Reaction of a Low Flux Atomic Oxygen Beam with a Spin-Coated Polyimide Film: The Effect of Simultaneous UV Irradiation.

1999 ◽  
Vol 47 (543) ◽  
pp. 182-187
Author(s):  
Masahito TAGAWA ◽  
Toru SUETOMI ◽  
Hiroshi KINOSHITA ◽  
Masataka UMENO ◽  
Nobuo OHMAE
Keyword(s):  
Uv Irradiation ◽  
Atomic Oxygen ◽  
Surface Reaction ◽  
Polyimide Film

Preparation and atomic oxygen erosion resistance of SiOx coating formed on polyimide film by plasma polymer deposition

Vacuum ◽  
2019 ◽  
Vol 165 ◽  
pp. 7-11 ◽  
Author(s):  
Huifeng Mu ◽  
Xue Wang ◽  
Zhonghua Li ◽  
Yuanyuan Xie ◽  
Yuan Gao ◽  
...  
Keyword(s):  
Atomic Oxygen ◽  
Erosion Resistance ◽  
Polyimide Film ◽  
Plasma Polymer ◽  
Polymer Deposition ◽  
Atomic Oxygen Erosion

Nonlinear Phenomena in the Mass Loss of Polyimide Films under Hyperthermal Atomic Oxygen Beam Exposure

2001 ◽  
Vol 13 (4) ◽  
pp. 225-234 ◽  
Author(s):  
Hiroshi Kinoshita ◽  
Masahito Tagawa ◽  
Kumiko Yokota ◽  
Nobuo Ohmae
Keyword(s):  
Mass Loss ◽  
Atomic Oxygen ◽  
Large Fraction ◽  
Orbit Space ◽  
Mass Gain ◽  
Polyimide Film ◽  
Low Earth Orbit ◽  
Space Environment ◽  
Nonlinear Phenomena ◽  
Abstraction Reaction

Erosion phenomenon of polyimide film under the hyperthermal atomic oxygen beam exposure, which is a simulated low Earth orbit space environment, has been investigated. The polyimide film was spin-coated on a sensor crystal of a quartz crystal microbalance, and the mass of the film was measured under the atomic oxygen beam exposure. The spin-coated polyimide film which was exposed to a 4.7 eV atomic oxygen beam showed a mass gain at the beginning of the reaction and then steady-state mass loss followed. The experimental results of the mass change was analysed by the computational model, and the results showed that the carbon abstraction rate at the oxygen-adsorbed sites was two orders higher than that at the unoxidized polyimide surface. The computational results suggested that a large fraction of the carbon abstraction reaction occurred in the oxygen-adsorbed site through a Langmuir–Hinshelwood reaction mechanism.

Atomic Oxygen and UV Irradiation Effects on Fluorosilicone Rubber: Comparison of RF Plasma and In-Flight Exposure

2008 ◽  
Vol 20 (4-5) ◽  
pp. 447-460 ◽  
Author(s):  
Alex Laikhtman ◽  
Irina Gouzman ◽  
Ronen Verker ◽  
Eitan Grossman ◽  
H. Gary Pippin
Keyword(s):  
Uv Irradiation ◽  
Atomic Oxygen ◽  
Rf Plasma ◽  
Irradiation Effects ◽  
Fluorosilicone Rubber

scholarly journals Self-Healing Anti-Atomic-Oxygen Phosphorus-Containing Polyimide Film via Molecular Level Incorporation of Nanocage Trisilanolphenyl POSS: Preparation and Characterization

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1013 ◽  
Author(s):  
Bohan Wu ◽  
Yan Zhang ◽  
Dayong Yang ◽  
Yanbin Yang ◽  
Qiang Yu ◽  
...  
Keyword(s):  
Atomic Oxygen ◽  
Composite Films ◽  
Polymeric Materials ◽  
Polyimide Film ◽  
Low Earth Orbit ◽  
Nanocomposite Films ◽  
Self Healing ◽  
Passivation Layers ◽  
Pyromellitic Anhydride ◽  
Oligomeric Silsesquioxane

Protection of polymeric materials from the atomic oxygen erosion in low-earth orbit spacecrafts has become one of the most important research topics in aerospace science. In the current research, a series of novel organic/inorganic nanocomposite films with excellent atomic oxygen (AO) resistance are prepared from the phosphorous-containing polyimide (FPI) matrix and trisilanolphenyl polyhedral oligomeric silsesquioxane (TSP–POSS) additive. The PI matrix derived from 2,2’-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) and 2,5-bis[(4-amino- phenoxy)phenyl]diphenylphosphine oxide (BADPO) itself possesses the self-healing feature in AO environment. Incorporation of TSP–POSS further enhances the AO resistance of the FPI/TSP composite films via a Si–P synergic effect. Meanwhile, the thermal stability of the pristine film is maintained. The FPI-25 composite film with a 25 wt % loading of TSP–POSS in the FPI matrix exhibits an AO erosion yield of 3.1 × 10−26 cm3/atom after an AO attack of 4.0 × 1020 atoms/cm2, which is only 5.8% and 1.0% that of pristine FPI-0 film (6FDA-BADPO) and PI-ref (PMDA-ODA) film derived from 1,2,4,5-pyromellitic anhydride (PMDA) and 4,4’-oxydianline (ODA), respectively. Inert phosphorous and silicon-containing passivation layers are observed at the surface of films during AO exposure.

Investigation into tolerance of polysiloxane-block-polyimide film against atomic oxygen

2010 ◽  
Vol 66 (5-6) ◽  
pp. 922-928 ◽  
Author(s):  
Eiji Miyazaki ◽  
Masahito Tagawa ◽  
Kumiko Yokota ◽  
Rikio Yokota ◽  
Yugo Kimoto ◽  
...  
Keyword(s):  
Atomic Oxygen ◽  
Polyimide Film

scholarly journals Property changes in materials due to atomic oxygen in the low Earth orbit

2021 ◽  
Author(s):  
Aki Goto ◽  
Kaori Umeda ◽  
Kazuki Yukumatsu ◽  
Yugo Kimoto
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atomic Oxygen ◽  
Surface Reactions ◽  
Ccd Camera ◽  
Polymeric Materials ◽  
Thermal Control ◽  
Polyimide Film ◽  
Low Earth Orbit ◽  
Earth Orbit ◽  
Exposure Experiment

AbstractWe expect satellites at altitude below 300 km, very low Earth orbit (VLEO), making observations of the Earth at optical wavelength with increasingly higher resolution. The density of atomic oxygen (AO) at VLEO is significantly higher than that at LEO; severe degradation of spacecraft materials (polymers) due to the high-flux AO is a serious concern. To clarify VLEO environmental effects on spacecraft materials, we designed the Material Degradation Monitor (MDM) and MDM2 missions. The MDM is a material exposure experiment onboard the Super Low-Altitude Test Satellite (SLATS). It aims to understand reactions and degradation of polymeric materials depending on AO fluence in VLEO. In the MDM, samples of spacecraft material were exposed at altitude of 160–560 km; their degradation behaviors were observed optically by a CCD camera for 1.8 years. The MDM2 is a material exposure experiment onboard the International Space Station (ISS) and aims to correctly understand surface reactions and degradation of the same samples used in the MDM at a given AO fluence. In the MDM2, the samples were exposed at altitude of 400 km for 1 year and then returned to Earth for analysis. Based on the results from both missions, we will help in the molecular design of more-durable materials, and establish design standards for future VLEO satellites. This study aims to quantitatively understand the surface reactions and degradation of the 11 types of thermal control materials exposed on the ISS in the MDM2. Five types of multilayer insulation (MLI) films (three types of Si-containing AO protective materials (a silsesquioxane-(SQ-) containing coated polyimide film, two types of polysiloxane-block polyimide (BSF-30) films), an ITO-coated polyimide film, and a Beta Cloth), and flexible optical solar reflectors (flexible OSRs) were found to have a high durability against erosion by AO. This was determined by measuring their loss of mass and thermo-optical properties. The Ag/Inconel layer’s discoloration and peeling were observed for three types of FEP/Ag films as determined by the Ag layer’s oxidation by AO. Also, X-ray photoelectron spectroscopy (XPS) showed that reactions of the Si-containing materials, the SQ-coated polyimide film and the BSF-30 film, form a layer of silica that protects against AO. Even though the concentration of Si in the SQ-coating is the same or greater than in the BSF-30 film, the amount of the SQ-coating that reacted was larger than that of the BSF-30 film under the same AO fluence. Moreover, the effective ability of the UV-shielding coating, composed of ITO and CeO2 coated onto one of the BSF-30 films, was demonstrated by UV–Vis spectrometry. Its sufficient AO protection was confirmed by mass measurements, XPS analyses, and FE-SEM observations.

POSS enhanced 3D graphene - Polyimide film for atomic oxygen endurance in Low Earth Orbit space environment

Polymer ◽  
2020 ◽  
Vol 191 ◽  
pp. 122270 ◽  
Author(s):  
Ranjana Shivakumar ◽  
Asaf Bolker ◽  
Siu Hon Tsang ◽  
Nurit Atar ◽  
Ronen Verker ◽  
...  
Keyword(s):  
Atomic Oxygen ◽  
Orbit Space ◽  
Polyimide Film ◽  
Low Earth Orbit ◽  
Space Environment ◽  
Earth Orbit ◽  
3D Graphene
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