Eco-Friendly Trinickel Disulfide Nanoparticles Advancing Poly-α-olefin Lubrication

作者：Zhengquan Jiang, Chenglong Wang, Wenwei Ma, Xiaogang Li, Laigui Yu, Shengmao Zhang, Weihua Li · 发表于：Langmuir · 年份：2025 · DOI：10.1021/acs.langmuir.5c01914 · 被引用次数：3 · 研究领域：Synthesis and properties of polymers、Tribology and Wear Analysis、Dendrimers and Hyperbranched Polymers

Friction and wear remain formidable challenges for mechanical components in modern industrial applications. Traditional lubricants rely on a combination of additives that synergistically enhance performance but often undergo thermal degradation at increased temperatures, causing mechanical lubrication failure. Trinickel disulfide (Ni 3 S 2 ) nanoparticles have emerged as promising candidates owing to their excellent tribological properties, chemical stability, and resilience at high temperatures. Compared with nonmagnetic nanoparticles, the magnetic properties of Ni 3 S 2 nanoparticles can quickly form a protective film on the metal surface and reduce mechanical damage. Nevertheless, the conventional synthesis route of Ni 3 S 2 requires high-temperature conditions and the release of toxic gases, resulting in environmental pollution. To address these limitations, we synthesized oleylamine-modified magnetic Ni 3 S 2 nanoparticles (OA-Ni 3 S 2 NPs) through a liquid-phase approach under mild conditions. Transmission electron microscopy (TEM) analysis indicated that OA-Ni 3 S 2 NPs had an average particle size of ∼40 nm. Tribological evaluation in poly-α-olefin-6 (PAO6) base oil, conducted using a four-ball tribometer, revealed that OA-Ni 3 S 2 NPs reduced the coefficient of friction (COF) by 31% and wear scar diameter (WSD) by 40% compared to pristine PAO6, underscoring their exceptional friction-reducing and antiwear performance, while mechanistic studies further clarified the s...