Synthesis of Microspheric Molybdenum Disulfide and Its Improvement on Tribological Properties of Bismaleimides
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Synthesis of Microspheric Molybdenum Disulfide and Its Improvement on Tribological Properties of Bismaleimides Yuan Jia1 · Zhen Liu1 · Xuan Wang1 · Juxiang Yang1 · Ruifeng Shi2 Received: 7 March 2020 / Accepted: 1 April 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract To overcome the poor stability and compatibility of molybdenum disulfide (MoS2) in organic solvents and resins, the hydroxyl silicate (HNS) was used as carriers, and a kind of novel M oS2 particles with microspheres structure ( MoS2/HNS) was finally prepared via a hydrothermal process. The scanning electron microscopy (SEM) was chosen to observe the morphology of oS2/HNS was then used as fillers to add into the bismaleimide (BMI) resin to prepare a the prepared M oS2/HNS. The M new MoS2/HNS/BMI composites. The results suggested that the microspheric MoS2/HNS possesses better stability and compatibility with BMI resin, while both the tribological properties and the mechanical properties of MoS2/HNS/BMI are also increased compared with BMI pure resin with the appropriate addition content of MoS2/HNS. Keywords Tribological properties · MoS2 · Bismaleimides · Hydrothermal process
1 Introduction In mechanical systems, friction and wear are the two main causes of energy and material loss, while enhancement of lubricity is the primary way to improve energy efficiency and mechanical durability [1]. As a kind of transition metal sulfides, molybdenum disulfide ( MoS2) possesses the sandwich layer structure [2, 3], while the S–Mo–S atoms of M oS2 were connected with strong covalent bonds [4], the layers were combined with the weak van der Waals force, therefore the interlayer sliding of MoS2 can occur more easily during wear process under loads [5], which can increase the ability to external load in a large extent, reducing the actual relative friction area significantly. However, the electrons in the edge of the layered MoS2 sheet have suspended bonds, thus they exhibit high chemical activity [6], and can be oxidized easily in the high-temperature and multi-oxygen environment [7]. In addition, transition metal sulfides particles have high * Yuan Jia [email protected] 1
The Key Laboratory for Surface Engineering and Remanufacturing in Shaanxi Province, College of Chemical Engineering, Xi’an University, Xi’an 710065, Shaanxi, People’s Republic of China
School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2
surface energy and are difficult to be uniformly dispersed in organic solvents and organic resin [8], which greatly limits their application in the field of mechanical materials. In order to achieve the maximum efficiency of MoS2 in tribological fields, the prominent problem is how to guarantee its original chemical structure [9], and endow it with the apparent closed morphology structure at the same time, thus it can become more stable, and occur rolling, elastic deformation and spherical shell peeling during the wear process [10]. D
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