High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions
Polyimide-bearing retainer has been successfully used in space environment. However, the structural damage of polyimide induced by space irradiation limits its wide use. In order to further improve the atomic oxygen resistance of polyimide and comprehensively investigate the tribological mechanism o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/10/2385 |
| _version_ | 1797598538373267456 |
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| author | Huimin Qi Yang Lei Xuemei Lei Ding Zhang Yafeng Zhang Jiaxin Yu Baogang Guo |
| author_facet | Huimin Qi Yang Lei Xuemei Lei Ding Zhang Yafeng Zhang Jiaxin Yu Baogang Guo |
| author_sort | Huimin Qi |
| collection | DOAJ |
| description | Polyimide-bearing retainer has been successfully used in space environment. However, the structural damage of polyimide induced by space irradiation limits its wide use. In order to further improve the atomic oxygen resistance of polyimide and comprehensively investigate the tribological mechanism of polyimide composites exposed in simulate space environment, 3-amino-polyhedral oligomeric silsesquioxane (NH<sub>2</sub>-POSS) was incorporated into a polyimide molecular chain and silica (SiO<sub>2</sub>) nanoparticles were in situ added into polyimide matrix and the combined effect of vacuum environment, and atomic oxygen (AO) on the tribological performance of polyimide was studied using bearing steel as the counterpart by a ball on disk tribometer. XPS analysis demonstrated the formation of protective layer induced by AO. The wear resistance of polyimide after modification was enhanced under AO attack. FIB-TEM confirmed that the inert protective layer of Si was formed on the counterpart during the sliding process. Mechanisms behind this are discussed based on the systematic characterization of worn surfaces of the samples and the tribofilms formed on the counterbody. |
| first_indexed | 2024-03-11T03:22:32Z |
| format | Article |
| id | doaj.art-8d1d7fff3a474fabb4fd40ebcfced86c |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T03:22:32Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-8d1d7fff3a474fabb4fd40ebcfced86c2023-11-18T02:59:17ZengMDPI AGPolymers2073-43602023-05-011510238510.3390/polym15102385High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen ConditionsHuimin Qi0Yang Lei1Xuemei Lei2Ding Zhang3Yafeng Zhang4Jiaxin Yu5Baogang Guo6Key Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaSchool of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tongyan Road 38, Tianjin 300350, ChinaKey Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of Testing Technology for Manufacturing Process, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaPolyimide-bearing retainer has been successfully used in space environment. However, the structural damage of polyimide induced by space irradiation limits its wide use. In order to further improve the atomic oxygen resistance of polyimide and comprehensively investigate the tribological mechanism of polyimide composites exposed in simulate space environment, 3-amino-polyhedral oligomeric silsesquioxane (NH<sub>2</sub>-POSS) was incorporated into a polyimide molecular chain and silica (SiO<sub>2</sub>) nanoparticles were in situ added into polyimide matrix and the combined effect of vacuum environment, and atomic oxygen (AO) on the tribological performance of polyimide was studied using bearing steel as the counterpart by a ball on disk tribometer. XPS analysis demonstrated the formation of protective layer induced by AO. The wear resistance of polyimide after modification was enhanced under AO attack. FIB-TEM confirmed that the inert protective layer of Si was formed on the counterpart during the sliding process. Mechanisms behind this are discussed based on the systematic characterization of worn surfaces of the samples and the tribofilms formed on the counterbody.https://www.mdpi.com/2073-4360/15/10/2385polyimideNH<sub>2</sub>-POSStribological propertiesatomic oxygentribofilm |
| spellingShingle | Huimin Qi Yang Lei Xuemei Lei Ding Zhang Yafeng Zhang Jiaxin Yu Baogang Guo High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions Polymers polyimide NH<sub>2</sub>-POSS tribological properties atomic oxygen tribofilm |
| title | High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions |
| title_full | High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions |
| title_fullStr | High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions |
| title_full_unstemmed | High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions |
| title_short | High Wear Resistance of POSS Grafted-Polyimide/Silica Composites under Atomic Oxygen Conditions |
| title_sort | high wear resistance of poss grafted polyimide silica composites under atomic oxygen conditions |
| topic | polyimide NH<sub>2</sub>-POSS tribological properties atomic oxygen tribofilm |
| url | https://www.mdpi.com/2073-4360/15/10/2385 |
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