Synthesis of multi-element (F,N,S) doped carbon nanospheres derived from polystyrene as lubricant additives for tribological performance improvement

Yixin Wang, Yi Wang, Yuhong Cui, Sha Liu, Shujuan Liu, Qian Ye, Feng Zhou, Weimin Liu

科研成果: 期刊稿件文章同行评审

摘要

In this study, the uniform dense polydopamine (PDA) coating was deposited on hyper-cross-linked polystyrene nanospheres (HPSs) through the oxidative polymerization of dopamine with polyethyleneimine (PEI), then which underwent acidification and subsequent anion exchange with LiNTf2 to obtain HPSs@PDA electrolyte (HPSs@PDA-NTf2). So, the multi-element-doped carbon nanospheres (F,N,S-PCNs) were synthesized through the carbonization of HPSs@PDA-NTf2, demonstrating exceptional tribological performance. Compared to 500SN, the mean COF of nanolubricant (500SN + 2.0 wt.% F,N,S-PCNs) decreased from 0.181 to 0.110, and the wear volume reduced by 90.3%. The load-carrying capacity of F,N,S-PCNs as lubricant additives is increased from 150N (500SN) to 450N. The F,N,S-PCNs can infiltrate the contact area and adsorb on the friction pair surface, forming a physical adsorption film that prevents the direct contact of surface. Additionally, the active elements (F,N,S) in F,N,S-PCNs undergo tribochemical reactions with the friction pair under mechanical force and thermal effects to form a chemical protective film. This dual effect significantly enhances the boundary lubrication performance of the lubricating oil. This study presents a novel approach for synthesizing multi-element co-doped carbon nanospheres, significantly enhancing the effectiveness of oil-based lubrication technology in the field.

源语言英语
文章编号94906995
期刊Nano Research
18
1
DOI
出版状态已出版 - 1月 2025

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