二维二硫化钼基润滑材料的可控制备及其摩擦学性能研究

运动部件的摩擦磨损是影响其使用寿命的主要原因之一。高性能润滑材料的研究与开发对延长部件的使用寿命具有重大的理论意义和应用价值。二硫化钼（MoS2）具有优异的摩擦学性能，被作为固体润滑剂及润滑油添加剂广泛使用。而与传统MoS2相比，二维MoS2纳米片具有与摩擦表面附着力强、低剪切强度方向尺寸大和厚度小的优点。本研究工作将首先利用剪切剥离技术实现二维MoS2纳米片的可控宏量制备，然后对其进行微观摩擦学测试，研究不同条件对纳米片力学和摩擦学性能的影响。在此基础上，将进一步开展二维MoS2基润滑涂层和润滑油添加剂的研制，并对它们的力学和宏观摩擦学性能进行研究，揭示其摩擦磨损行为规律及润滑机理。本项目的成功实施，将深入认识二维MoS2抗磨理论，为发展基于少层二维材料的固体润滑涂层和低维纳米润滑油添加剂材料奠定理论基础，并为二维片状材料在微电子机械系统和航空航天等领域摩擦系统中的实际应用提供技术支持。

Friction between moving components is one of the main reasons to shorten their service life. Developing high performance lubricants to prolong the service life of moving components is both theoretically significant and practically valuable. Molybdenum disulfide (MoS2) is an ideal solid lubricant and solid lubricating additive for the lubricating oil because of its excellent tribological properties. Compared to the traditional MoS2 materials, two-dimensional (2D) MoS2 nanosheets possess advantages of stronger adhesion on friction surface, larger size along the low shear strength direction and thinner thickness. In this project, firstly, we will systematically study the controllable and scalable preparation of 2D MoS2 nanosheets by shear exfoliation technology; secondly, we will study their micro-tribological properties, mainly focusing on revealing the effects of experimental conditions on mechanical and tribological properties of the 2D MoS2 nanosheets; finally, we will develop 2D MoS2 nanosheets-based coating materials and lubricating oil additives, then study their tribological properties and reveal its law of friction and wear behavior as well as the lubricating mechanism of the prepared materials. The success of this project can bring about the following significant beneficial outcomes: (1) deeper understanding of lubrication and wear-resistance theory of 2D MoS2 nanomaterias; (2) development of the theoretical foundation in 2D MoS2 based solid lubricant coatings and low-dimensional lubricating oil additive nanomaterials; (3) providing the technical support for solving practical application problems in microelectronic mechanical systems and aerospace fields.