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Electrostatically Self-Assembled Magnetic Nanoparticles for High-Temperature Resistant and Friction-Controlled Lubrication System
Small ( IF 13.0 ) Pub Date : 2024-09-09 , DOI: 10.1002/smll.202405018 Tao Yang 1, 2, 3 , Xiaozhen Wang 4 , Huanchen Liu 1 , Siwei Chen 1 , Junming Liu 1 , Qin Zhao 1 , Kuiliang Gong 1 , Weimin Li 1, 3 , Yongmin Liang 2 , Xiaobo Wang 1, 3
Small ( IF 13.0 ) Pub Date : 2024-09-09 , DOI: 10.1002/smll.202405018 Tao Yang 1, 2, 3 , Xiaozhen Wang 4 , Huanchen Liu 1 , Siwei Chen 1 , Junming Liu 1 , Qin Zhao 1 , Kuiliang Gong 1 , Weimin Li 1, 3 , Yongmin Liang 2 , Xiaobo Wang 1, 3
Affiliation
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Magnetic-responsive surfactants are considered promising smart lubricating materials due to their significant stimulation response to applied magnetic fields. In this study, four magneto-responsive surfactants are successfully fabricated and encapsulated on the surface of molybdenum disulfide nanosheets (MoS2@C18H37N+(CH3)3[XCl3Br]−, X = Fe, Ce, Gd, and Ho) as base-oil components using electrostatic self-assembly, thereby constructing a multi-functional magnetic lubrication system (MoS2@STAX). Magnetorheological measurements confirm the remarkable responsiveness of MoS2@STACe lubricants at high shear rates and applied magnetic fields, which is further corroborated by the constant proximity of the magnet. The formation of dense carbon and tribo-chemical films between the friction interfaces at elevated temperatures is the primary factor contributing to the significant reduction in frictional wear. Notably, the magnetic lubricant demonstrates a pronounced response behavior when subjected to an applied magnetic field in the ceramic tribopair, even at lower magnetic fields. This work presents concepts for the development of high-temperature resistant and tunable lubrication additives by designing the material structure and controlling the magnetic stimulation.
中文翻译：
用于耐高温和摩擦控制润滑系统的静电自组装磁性纳米颗粒
磁性响应表面活性剂被认为是很有前途的智能润滑材料，因为它们对施加的磁场有显著的刺激反应。在本研究中，成功制备了四种磁响应表面活性剂，并将其封装在二硫化钼纳米片（MoS2@C18H37N+（CH3）3[XCl3Br]−、X = Fe、Ce、Gd 和 Ho）表面作为基础油组分上，利用静电自组装构建了多功能磁润滑系统 （MoS2@STAX）。磁流变测量证实了 MoS2@STACe 润滑剂在高剪切速率和施加磁场下的显著响应性，磁体的恒定接近进一步证实了这一点。在高温下，摩擦界面之间形成致密的碳和摩擦化学膜是导致摩擦磨损显著减少的主要因素。值得注意的是，磁性润滑剂在陶瓷摩擦中受到施加的磁场时表现出明显的响应行为，即使在较低的磁场中也是如此。这项工作通过设计材料结构和控制磁刺激，提出了开发耐高温和可调润滑添加剂的概念。
更新日期：2024-09-09
中文翻译：
用于耐高温和摩擦控制润滑系统的静电自组装磁性纳米颗粒
磁性响应表面活性剂被认为是很有前途的智能润滑材料，因为它们对施加的磁场有显著的刺激反应。在本研究中，成功制备了四种磁响应表面活性剂，并将其封装在二硫化钼纳米片（MoS2@C18H37N+（CH3）3[XCl3Br]−、X = Fe、Ce、Gd 和 Ho）表面作为基础油组分上，利用静电自组装构建了多功能磁润滑系统 （MoS2@STAX）。磁流变测量证实了 MoS2@STACe 润滑剂在高剪切速率和施加磁场下的显著响应性，磁体的恒定接近进一步证实了这一点。在高温下，摩擦界面之间形成致密的碳和摩擦化学膜是导致摩擦磨损显著减少的主要因素。值得注意的是，磁性润滑剂在陶瓷摩擦中受到施加的磁场时表现出明显的响应行为，即使在较低的磁场中也是如此。这项工作通过设计材料结构和控制磁刺激，提出了开发耐高温和可调润滑添加剂的概念。
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