Wang Yixin, Wu Shihan, Yan Kaige, Zhang Rui, Liu Shujuan, Ye Qian, Zhou Feng
State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, PR China.
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China.
Langmuir. 2024 Apr 30;40(17):8992-9000. doi: 10.1021/acs.langmuir.4c00301. Epub 2024 Apr 18.
The present study utilizes styrene as a raw material to prepare hyper-cross-linked polystyrene nanospheres (HPSs) through the Friedel-Crafts reaction, establishing stable covalent bond structures within the polymer chains. The hydrophilic polystyrene nanospheres─TMA@SHPSs were successfully synthesized via sulfonation and ion exchange reactions, demonstrating exceptional properties in reducing friction and wear. Compared with pure water, the addition of 4.0 wt % TMA@SHPSs results in a 62.2% reduction in the friction coefficient, accompanied by a significant decrease to 1.17 × 10 μm in wear volume. The results demonstrate that TMA@SHPSs, as water-based lubrication additives, generate composite protective films (tribo-chemical protective films and physical protective films) during the friction process, which effectively prevents direct contact between the friction pairs and achieves remarkable antifriction and antiwear effects. The results of the antimicrobial activity test indicate that TMA@SHPSs demonstrate exceptional antibacterial efficacy due to the bacteriostatic effect induced by hydration and the bactericidal properties of quaternary ammonium cations.
本研究以苯乙烯为原料，通过傅克反应制备超交联聚苯乙烯纳米球（HPSs），在聚合物链内建立稳定的共价键结构。通过磺化和离子交换反应成功合成了亲水性聚苯乙烯纳米球——TMA@SHPSs，其在降低摩擦和磨损方面表现出优异性能。与纯水相比，添加4.0 wt%的TMA@SHPSs可使摩擦系数降低62.2%，磨损体积显著减小至1.17×10μm。结果表明，TMA@SHPSs作为水基润滑添加剂，在摩擦过程中生成复合保护膜（摩擦化学保护膜和物理保护膜），有效防止摩擦副直接接触，实现显著的减摩和抗磨效果。抗菌活性测试结果表明，由于水化诱导的抑菌作用和季铵阳离子的杀菌性能，TMA@SHPSs表现出优异的抗菌效果。
