Surface modification of polymers used in the Low Earth Orbit space environment

1998 ◽  
pp. 341-362
Keyword(s):  
Surface Modification ◽  
Orbit Space ◽  
Low Earth Orbit ◽  
Space Environment ◽  
Earth Orbit

Surface Modification of Polymers, Paints and Composite Materials Used in the Low Earth Orbit Space Environment

2004 ◽  
Vol 851 ◽  
Author(s):  
Jacob I. Kleiman
Keyword(s):  
Surface Modification ◽  
Composite Materials ◽  
High Performance ◽  
Orbit Space ◽  
Thermal Control ◽  
Low Earth Orbit ◽  
Space Environment ◽  
Earth Orbit ◽  
Surface Erosion ◽  
Materials Used

ABSTRACTMany organic-based materials exposed to low Earth orbit (LEO) environment undergo dramatic changes and irreversible degradation of physical characteristics. While many protective schemes are used to reduce the effects of LEO environment, protection of such materials in LEO still remains a major challenge, especially for future long duration missions or space stations.In addition to the traditional protective coating approaches, surface modification processes were proposed and successfully used as an approach to protect polymers, thermal control paints and other components and structures from LEO environment. Among them two surface modification processes, the Photosil™ and the Implantox™ that used new approaches in silicon functionalization, as in the Photosil™, and a modified ion implantation process, as in the Implantox™ allowed to incorporate up to 36 at.% of Si into the upper surface layer regions of the treated polymers, composite materials, thermal control paints and other high-performance organic materials.The tests conducted in plasma and fast atomic oxygen (FAO) beam facilities at comparable to LEO fluencies (∼ (1–2)·1020 at.O/cm2 ) demonstrated erosion yields lower than −10−26 cm3at, unchanged thermal optical properties, where important, and excellent thermal match between the treated layers and the bulk of the treated materials. After FAO testing, the Implantox™ treated samples were clear and transparent, with a glassy-like shiny surface with no signs of any surface erosion.

Response of MoS2-Sb2O3 film to low-earth-orbit space environment

2018 ◽  
Vol 227 ◽  
pp. 161-164 ◽  
Author(s):  
Xiaoming Gao ◽  
Ming Hu ◽  
Yanlong Fu ◽  
Lijun Weng ◽  
Weimin Liu ◽  
...  
Keyword(s):  
Orbit Space ◽  
Low Earth Orbit ◽  
Space Environment ◽  
Earth Orbit

scholarly journals Erosion on Polyimide and Fluorinated Polymers in Combined Low Earth Orbit Space Environment

2005 ◽  
Vol 31 (5) ◽  
pp. 318-323 ◽  
Author(s):  
Kumiko YOKOTA ◽  
Kohei IKEDA ◽  
Masahito TAGAWA ◽  
Akio OKAMOTO
Keyword(s):  
Orbit Space ◽  
Low Earth Orbit ◽  
Space Environment ◽  
Earth Orbit ◽  
Fluorinated Polymers

scholarly journals Effect of thermocycling on the microstructure of Ti-6Al-4V alloy in simulated low Earth orbit space environment

2016 ◽  
Vol 59 (5) ◽  
pp. 363-370 ◽  
Author(s):  
Peng Lv ◽  
Jingbo Xu ◽  
Ruoran Yang ◽  
Conglin Zhang ◽  
Futao Zhang ◽  
...  
Keyword(s):  
Orbit Space ◽  
Low Earth Orbit ◽  
Space Environment ◽  
Earth Orbit

Effects of Atomic Oxygen Irradiation on PDMS/POSS Hybrid Films in Low Earth Orbit Environment

2011 ◽  
Vol 239-242 ◽  
pp. 1368-1371 ◽  
Author(s):  
Mi Mi Song ◽  
Shu Wang Duo ◽  
Ting Zhi Liu
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atomic Oxygen ◽  
Orbit Space ◽  
Low Earth Orbit ◽  
Hybrid Coating ◽  
Space Environment ◽  
Earth Orbit ◽  
Chemical Compositions ◽  
Hybrid Films ◽  
Polyimide Films

In order to improve the atomic oxygen (AO) erosion resistance of polyimide films in low earth orbit space environment, a type PDMS/POSS hybrid coating on polyimide substrate was prepared based on a silanol terminated polydimethylsiloxane (PDMS-OH) and Octakis(trimethylsiloxy)octaprismosilsesquioxane (Q8[Si(CH3)3]8) by copolymerizing process in DMAc solution. The atomic oxygen exposure tests were carried out using a ground-based atomic oxygen simulation facility. The mass loss, surface morphology and surface chemical compositions of PDMS/POSS hybrid films before and after exposure to incremental AO flux were investigated by using microbalance and field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS), respectively. The data indicated that a silica-rich layer was formed on the surface of the hybrid coating when the coating is exposed to AO flux, which could provide a protective barrier on the surface preventing further degradation of the polymer during extended exposure to AO and obviously improved the AO resistance of polyimide films.

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