Superlubricity by polyimide-induced alignment
Abstract We have investigated the lubrication alignment behavior of point-plane contact and plane-plane contact between the GCr15 steel and polyimide (PI) friction pair using nematic liquid crystals (LCs) as the lubricant. In this system, rubbing orients the macromolecular PI molecules, and the orie...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-03-01
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| Series: | Friction |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40544-022-0686-6 |
| _version_ | 1827905307389460480 |
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| author | Xinlei Gao Hao Chen Hong Yan Chengrui Huang Li Wu Tingting Wang |
| author_facet | Xinlei Gao Hao Chen Hong Yan Chengrui Huang Li Wu Tingting Wang |
| author_sort | Xinlei Gao |
| collection | DOAJ |
| description | Abstract We have investigated the lubrication alignment behavior of point-plane contact and plane-plane contact between the GCr15 steel and polyimide (PI) friction pair using nematic liquid crystals (LCs) as the lubricant. In this system, rubbing orients the macromolecular PI molecules, and the oriented PI molecules induce alignment of the LC molecules in contact with or close to the oriented PI molecules. The LC molecules are aligned in the wear scar grooves of the PI film, and alignment extends to the GCr15-steel counterpart. Alignment of the LC molecules is correlated with the strong interaction force between the PI and LC molecules, the stable coordination structure of the LCs and GCr15 steel, and the weak interaction between the LC molecules. We performed simulations of the pretilt angle of PI and LCs and discussed the relationship between the pretilt angle and the friction properties. Owing to the small pretilt angle between PI and the LCs, the LC molecules orient almost parallel to the PI material, which is beneficial for superlubricity of this type of friction system. |
| first_indexed | 2024-03-13T00:39:49Z |
| format | Article |
| id | doaj.art-90cd88b5be654b218a3404a79b995bc5 |
| institution | Directory Open Access Journal |
| issn | 2223-7690 2223-7704 |
| language | English |
| last_indexed | 2024-03-13T00:39:49Z |
| publishDate | 2023-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Friction |
| spelling | doaj.art-90cd88b5be654b218a3404a79b995bc52023-07-09T11:24:40ZengSpringerOpenFriction2223-76902223-77042023-03-011191690170710.1007/s40544-022-0686-6Superlubricity by polyimide-induced alignmentXinlei Gao0Hao Chen1Hong Yan2Chengrui Huang3Li Wu4Tingting Wang5School of Materials Science and Engineering, Hubei UniversitySchool of Chemical and Environmental Engineering, Wuhan Polytechnic UniversityState Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical TechnologySchool of Chemical and Environmental Engineering, Wuhan Polytechnic UniversitySchool of Chemistry and Environmental Engineering, Wuhan Institute of TechnologySchool of Chemical and Environmental Engineering, Wuhan Polytechnic UniversityAbstract We have investigated the lubrication alignment behavior of point-plane contact and plane-plane contact between the GCr15 steel and polyimide (PI) friction pair using nematic liquid crystals (LCs) as the lubricant. In this system, rubbing orients the macromolecular PI molecules, and the oriented PI molecules induce alignment of the LC molecules in contact with or close to the oriented PI molecules. The LC molecules are aligned in the wear scar grooves of the PI film, and alignment extends to the GCr15-steel counterpart. Alignment of the LC molecules is correlated with the strong interaction force between the PI and LC molecules, the stable coordination structure of the LCs and GCr15 steel, and the weak interaction between the LC molecules. We performed simulations of the pretilt angle of PI and LCs and discussed the relationship between the pretilt angle and the friction properties. Owing to the small pretilt angle between PI and the LCs, the LC molecules orient almost parallel to the PI material, which is beneficial for superlubricity of this type of friction system.https://doi.org/10.1007/s40544-022-0686-6superlubricitypolyimideliquid crystalalignment |
| spellingShingle | Xinlei Gao Hao Chen Hong Yan Chengrui Huang Li Wu Tingting Wang Superlubricity by polyimide-induced alignment Friction superlubricity polyimide liquid crystal alignment |
| title | Superlubricity by polyimide-induced alignment |
| title_full | Superlubricity by polyimide-induced alignment |
| title_fullStr | Superlubricity by polyimide-induced alignment |
| title_full_unstemmed | Superlubricity by polyimide-induced alignment |
| title_short | Superlubricity by polyimide-induced alignment |
| title_sort | superlubricity by polyimide induced alignment |
| topic | superlubricity polyimide liquid crystal alignment |
| url | https://doi.org/10.1007/s40544-022-0686-6 |
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