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Surface Modification of MoS2 Nanosheets as Effective Lubricant Additives for Reducing Friction and Wear in Poly-α-olefin
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-06-01 , DOI: 10.1021/acs.iecr.8b00454
Xinhu Wu 1, 2 , Kuiliang Gong 1, 3 , Gaiqing Zhao 1, 3 , Wenjing Lou 1, 3 , Xiaobo Wang 1, 3 , Weimin Liu 1
Affiliation  

Herein, MoS2 nanosheets (MoS2) densely modified with n-octadecyl mercaptan (NOM) are used as effective friction-reducing and antiwear additives. A facile and green strategy is employed to prepare the organic–inorganic hybrid nanosheets (MoS2–NOM) by mussel-inspired chemistry combining with the Michael addition reaction. When MoS2–NOM nanosheets are added in poly-α-olefin (PAO) 10, they form a homogeneous and stable dispersion compared to the unmodified MoS2. Tribological measurements show that the dispersion of PAO 10 containing 1 wt % MoS2–NOM displays dramatic reductions in the friction coefficient (∼53%) and wear volume (∼92%). The exceptional tribological behaviors of MoS2–NOM are ascribed to the formation of a boundary protection film during tribochemical reactions. Further investigations display that the addition of 1 wt % MoS2–NOM can efficiently improve the maximum load-carrying capacity and the high-temperature lubricating property of PAO 10 base oil, which is likely due to the formation of n-octadecyl thioether on the surface of MoS2 after the modification of MoS2–polydopamine (PDA) with NOM via Michael addition.

中文翻译:

MoS 2纳米片的表面改性,作为减少聚α-烯烃摩擦和磨损的有效润滑剂添加剂

在本文中,使用十八烷基硫醇(NOM )密集改性的MoS 2纳米片(MoS 2)被用作有效的减摩和抗磨添加剂。通过贻贝启发化学结合迈克尔加成反应,采用一种简便且绿色的策略来制备有机-无机杂化纳米片(MoS 2 -NOM)。当将MoS 2 –NOM纳米片添加到聚α-烯烃(PAO)10中时,与未改性的MoS 2相比,它们形成了均匀且稳定的分散体。摩擦学测量表明,含有1 wt%MoS 2的PAO 10的分散体–NOM的摩擦系数(〜53%)和磨损量(〜92%)显着降低。MoS 2 -NOM的特殊摩擦学行为归因于摩擦化学反应过程中边界保护膜的形成。进一步的研究表明,添加1 wt%的MoS 2 -NOM可以有效地提高PAO 10基础油的最大承载能力和高温润滑性能,这很可能是由于在其上形成了十八烷基硫醚。通过迈克尔加成,用NOM修饰MoS 2-聚多巴胺(PDA)后,MoS 2的表面。
更新日期:2018-06-01
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