A sulfonated modification of PEEK for ultralow friction
Abstract Polyether ether ketone (PEEK) is a widely used material for friction pairs due to its excellent mechanical strength, good wear resistance, and chemical inertness. However, some modifications are necessary when PEEK is used as a water-lubricated friction pair. In this study, a novel sulfonat...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2022-07-01
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| Series: | Friction |
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| Online Access: | https://doi.org/10.1007/s40544-022-0625-6 |
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| author | Shihua Yuan Chenhui Zhang |
| author_facet | Shihua Yuan Chenhui Zhang |
| author_sort | Shihua Yuan |
| collection | DOAJ |
| description | Abstract Polyether ether ketone (PEEK) is a widely used material for friction pairs due to its excellent mechanical strength, good wear resistance, and chemical inertness. However, some modifications are necessary when PEEK is used as a water-lubricated friction pair. In this study, a novel sulfonation method was developed to design a water-lubricated friction pair with ultralow friction, good wear resistance, and high loading capacity. PEEK powders were sulfonated using ClSO3H and sintered to form bulk plastic. The sulfonated PEEK (SPEEK) plastic exhibited good tribological properties. At a low sliding speed, the friction coefficient was smaller than 0.02 when a 3 wt% NaCl solution was used as the lubricant. The order of magnitude of the wear rate was as low as 10−8 mm3/(N·m). The mechanism of friction reduction was mainly hydration lubrication. The negatively charged −SO3 − groups on the friction pair can adsorb hydrated Na+ cations by electrostatic interactions. These hydrated Na+ cations have a high load capacity and low shearing resistance. The ultralow wear mechanism observed in this study is possibly due to ultralow friction properties of the friction pairs prepared through the proposed sulfonation and thermoforming procedures. |
| format | Article |
| id | doaj-art-e439e6e78d994c609ec0a0cdcecbe53d |
| institution | OA Journals |
| issn | 2223-7690 2223-7704 |
| language | English |
| publishDate | 2022-07-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Friction |
| spelling | doaj-art-e439e6e78d994c609ec0a0cdcecbe53d2025-08-20T02:21:34ZengTsinghua University PressFriction2223-76902223-77042022-07-0111688189310.1007/s40544-022-0625-6A sulfonated modification of PEEK for ultralow frictionShihua Yuan0Chenhui Zhang1State Key Laboratory of Tribology, Tsinghua UniversityState Key Laboratory of Tribology, Tsinghua UniversityAbstract Polyether ether ketone (PEEK) is a widely used material for friction pairs due to its excellent mechanical strength, good wear resistance, and chemical inertness. However, some modifications are necessary when PEEK is used as a water-lubricated friction pair. In this study, a novel sulfonation method was developed to design a water-lubricated friction pair with ultralow friction, good wear resistance, and high loading capacity. PEEK powders were sulfonated using ClSO3H and sintered to form bulk plastic. The sulfonated PEEK (SPEEK) plastic exhibited good tribological properties. At a low sliding speed, the friction coefficient was smaller than 0.02 when a 3 wt% NaCl solution was used as the lubricant. The order of magnitude of the wear rate was as low as 10−8 mm3/(N·m). The mechanism of friction reduction was mainly hydration lubrication. The negatively charged −SO3 − groups on the friction pair can adsorb hydrated Na+ cations by electrostatic interactions. These hydrated Na+ cations have a high load capacity and low shearing resistance. The ultralow wear mechanism observed in this study is possibly due to ultralow friction properties of the friction pairs prepared through the proposed sulfonation and thermoforming procedures.https://doi.org/10.1007/s40544-022-0625-6polyether ether ketone (PEEK)sulfonationhydration lubricationfrictionwear |
| spellingShingle | Shihua Yuan Chenhui Zhang A sulfonated modification of PEEK for ultralow friction Friction polyether ether ketone (PEEK) sulfonation hydration lubrication friction wear |
| title | A sulfonated modification of PEEK for ultralow friction |
| title_full | A sulfonated modification of PEEK for ultralow friction |
| title_fullStr | A sulfonated modification of PEEK for ultralow friction |
| title_full_unstemmed | A sulfonated modification of PEEK for ultralow friction |
| title_short | A sulfonated modification of PEEK for ultralow friction |
| title_sort | sulfonated modification of peek for ultralow friction |
| topic | polyether ether ketone (PEEK) sulfonation hydration lubrication friction wear |
| url | https://doi.org/10.1007/s40544-022-0625-6 |
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