Tailoring the tribological performance of SPEEK by sulfonation degree under water lubrication

被引：1

作者：

Wu, Minsong ^{[1
]}

Tang, Zijian ^{[1
]}

Tang, Weizhong ^{[1
]}

Chen, Xiaozhi ^{[1
]}

Hu, Tao ^{[1
]}

Li, Xiaolei ^{[1
]}

Zhang, Chenhui ^{[1
,2
]}

机构：

[1] Jihua Lab, Engn Ctr Superlubr, Foshan 528200, Peoples R China

[2] Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China

来源：

COMPOSITES COMMUNICATIONS | 2025年 / 54卷

基金：

国家重点研发计划;

关键词：

Sulfonated polyether ether ketone (SPEEK); Sulfonation degree; Hydrophily; tribological performance; PEEK COMPOSITES; ETHER;

D O I：

10.1016/j.coco.2025.102285

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Polyether ether ketone (PEEK) is a high-performance engineering polymer suitable for water lubricated bearings. However, some modifications are imperative due to its poor tribological performances in aqueous solutions. Herein, a novel sulfonated polyether ether ketone (SPEEK) was synthesized through nucleophilic condensation reaction with well-controlled sulfonation degree. The impact of sulfonation degree on surface hydrophilicity, mechanical strength, and tribological properties of SPEEK was thoroughly investigated. Among them, SPEEK-gamma with a sulfonation degree of 2.44 mol% exhibited superior tribological performance. Compared to neat PEEK and Thordon SXL, it showed a reduction in coefficient of friction (COF) by 33.7 % and 39.3 %, respectively, as well as a decrease in wear rate by 54.2 % and 97.8 %, respectively. The exceptional tribological properties of SPEEK-gamma can be attributed to the adsorption of hydrated Na+ cations facilitated by sulfonic acid groups (-SO3-), leading to hydration lubrication at the counterface interface while also enhancing intermolecular forces within the polymer matrix through sulfonic acid groups (-SO3-) presence. Consequently, SPEEK-gamma exhibits great potential as an underwater equipment material due to its excellent tribological properties under water lubrication conditions.

引用

页数：10

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