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Molecular dynamics study on mechanism of atomic oxygen erosion resistance of polysiloxane-polyimide composites
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Shengrui ZHOU1, Li ZHANG1, Liang ZOU1, Qiuqin SUN2
Insulating Materials | 2024, 57(10) : 84 - 90
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Insulating Materials | 2024, 57(10): 84-90
• Special Issue on High Performance Polyimide Materials •
Molecular dynamics study on mechanism of atomic oxygen erosion resistance of polysiloxane-polyimide composites
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Shengrui ZHOU1, Li ZHANG1, Liang ZOU1, Qiuqin SUN2
Affiliations
  • 1School of Electrical Engineering, Shandong University, Jinan 250061, China
  • 2College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Published: 2024-10-20 doi: 10.16790/j.cnki.1009-9239.im.2024.10.011
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In order to investigate the improving mechanism of polysiloxane with different substituents on atomic oxygen (AO) erosion resistance of polyimide in space environments, reactive molecular dynamics (MD) simulations was used to analyze the AO erosion resistance of PI composited with polyhedral oligomeric silsesquioxane (POSS) with trifluoromethyl (-CF3) group and methyl (-CH3) group. The results show that both the composites exhibit strong AO erosion resistance by forming an SiO2 layer that blocks AO propagation into the polymer matrix and and heat transfer. The PI/CF3-POSS shows the best performance, and its normalized mass is 0.83 after 35 ps of AO exposure, while the nomalized mass of the PI/CH3-POSS composite is 0.78.

polyimide  /  atomic oxygen  /  polyhedral oligomeric silsesquioxane  /  trifluoromethyl
Shengrui ZHOU, Li ZHANG, Liang ZOU, Qiuqin SUN. Molecular dynamics study on mechanism of atomic oxygen erosion resistance of polysiloxane-polyimide composites[J]. Insulating Materials, 2024 , 57 (10) : 84 -90 . DOI: 10.16790/j.cnki.1009-9239.im.2024.10.011
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Year 2024 volume 57 Issue 10
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2024.10.011
  • Receive Date：2024-04-26
  • Online Date：2025-12-24
  • Published：2024-10-20
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  • Received：2024-04-26
  • Revised：2024-06-05
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    1School of Electrical Engineering, Shandong University, Jinan 250061, China
    2College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2024.10.011
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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