Article
Multidisciplinary Sciences
Thachnatharen Nagarajan, Nanthini Sridewi, Weng Pin Wong, Rashmi Walvekar, Mohammad Khalid
Summary: This research explores the potential of microwave-synthesized MoS2-graphene nanohybrid as additives to enhance the tribological properties of diesel-based engine oil. The results demonstrate that adding just 0.05 wt% of MoS2-graphene nanohybrid leads to a remarkable reduction in friction coefficient and wear scar diameter, as well as improvements in oxidation resistance and thermal conductivity.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Mechanical
Jin Yang, Qingfeng Xiao, Zhe Lin, Yong Li, Xiaohua Jia, Haojie Song
Summary: By introducing a PDA transition layer and MoS2 nanosheets, the interface bonding of the PI/CF composites can be significantly enhanced, resulting in composites with better mechanical and tribological properties.
Article
Engineering, Electrical & Electronic
Haoyuan Wang, Luxi Yang, Hengfeng Li
Summary: This study fabricates polyetherimide (PEI) matrix composite films with field-dependent nonlinear conductive behavior using MoS2 as filler. The MoS2 filled PEI composite film exhibits a nonlinear coefficient of 6.92 at a filler content of 15 phr, which is the percolation threshold. The nonlinear conductive behavior of the MoS2/PEI composites is driven by tunneling effect. The inclusion of MoS2 fillers enhances the dielectric constant of PEI.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Coatings & Films
W. D. Sun, J. Wang, K. W. Wang, J. J. Pan, R. Wang, M. Wen, K. Zhang
Summary: By doping metal atoms like Cu into MoS2 to form turbulence-like micro-nano structure, the hardness can be increased and the friction coefficient can be decreased, leading to improved mechanical and tribological properties for application in the atmosphere.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Meirong Yi, Jiaxun Qiu, Wenhu Xu
Summary: This study synthesized ultra-thin MoS2 nanosheets through a chemical method and investigated their friction-reducing and antiwear capabilities in formulated engine oil. The research also studied the tribofilm formation, interface structure, and friction mechanism through surface characterization and chemical analysis. This contributes to a better understanding of the lubrication mechanism of MoS2 nanoparticles in formulated engine oil.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Materials Science, Composites
Peilong Li, Zhaozhu Zhang, Mingming Yang, Junya Yuan, Wei Jiang
Summary: A novel talc-MoS2 hybrid nanosheets were successfully synthesized and incorporated into fabric composites, showing significant improvements in thermal stability and hardness, as well as reduced wear rate under different conditions. The layered structure of talc-MoS2 nanosheets played a crucial role in enhancing the tribological performance of the composites.
POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Hikmet Cicek, Ozan Can Akar, Ihsan Efeoglu
Summary: In this study, functional solid lubricant coatings were successfully produced by integrating MoS2 solid lubricant films with crystalline TiNi films for the first time. The tribological properties of the coatings were investigated through various analyses, showing that TiNi/MoS2 coatings exhibited excellent friction properties under both atmospheric and high-temperature conditions.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Materials Science, Coatings & Films
Cuihong Han, Guolu Li, Guozheng Ma, Jiadong Shi, Yunfan Liu, Zhen Li, Haidou Wang
Summary: By depositing the Mo/MoS2-Pb-PbS composite film using PVD coating + low-temperature ion sulfide composite process, a strong and lubricating layer was successfully achieved on 9Cr18 bearing steel, solving the issue of weak film-substrate cohesion in molybdenum disulfide solid lubricant coating in harsh space environment. The composite film exhibited good friction-reduction and anti-wear properties in vacuum, with wear (partly) occurring between transfer film and lubricating film due to the formation of a transfer film on mating surface.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Energy & Fuels
Hailemichael O. Yosief, Majher Sarker, Grigor B. Bantchev, Robert O. Dunn, Steven C. Cermak
Summary: This study explores the possibility of using chemically modified chicken fat as a lubricant. The modified chicken fat shows higher density and better oxidative stability, and can be blended with high oleic sunflower oil. This demonstrates that animal fats can be chemically modified to improve their physicochemical properties, making them viable renewable resources for producing value-added products like biolubricants.
Article
Materials Science, Coatings & Films
Yijing Wang, Rongze Li, Xiaoqin Zhao, Yun Xue, Yulong An, Huidi Zhou, Jianmin Chen
Summary: In this study, Al2O3/MoS2 and Al2O3/Ag/MoS2 composite coatings were manufactured by impregnating the inherent pores and cracks inside Al2O3 and Al2O3/Ag coatings with MoS2 through vacuum impregnation and in-situ hydrothermal synthesis. The microstructure and mechanical properties of these coatings were analyzed, and the synergistic action of Ag and MoS2 on their tribological properties was discussed. The introduction of Ag and MoS2 into the defects of Al2O3/Ag/MoS2 coating not only reduced the wear rate but also enhanced the lubrication effect, providing excellent long-time lubricating performance due to the formation of a continuous lubricating film.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Weizhou Li, Zhibin Yan, Deli Shen, Ziying Zhang, Ruixia Yang
Summary: MoS2 overlayers with self-lubricating effect were prepared by hydrothermal synthesis to improve tribological properties of micro-arc oxidation (MAO) coating. The MoS2/MAO coating consisted mainly of MoS2, gamma-Al2O3, and mullite phases. The crystallinity, thickness, and continuity of the MoS2 overlayer increased with increasing hydrothermal temperature. The incorporation of oxygen into MoS2 at lower temperature improved its self-lubricating effect.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Chemistry, Physical
Zehui Sun, Shiming Zhao, Zhihao Gu, Wei Ma
Summary: The intrinsic activities of single MoS2 flakes toward the hydrogen evolution reaction (HER) were investigated by single nanoparticle collision electrochemical measurements. It was found that bilayer MoS2 flakes show the highest HER performance and the greatest magnetic enhancement among the different layers of MoS2 flakes. This is due to the abundance of exposed edge sites and sulfur vacancies in bilayer MoS2 flakes, which accelerate the reaction kinetics of HER and increase the ferromagnetism properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Yanan Meng, Jianlin Sun, Jiaqi He, Fulin Yang, Ping Wu
Summary: By using a self-made surface modifier, the agglomeration and deposition of MoS2 nanofluid can be alleviated, resulting in improved dispersion stability and tribological properties.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Cheng Liu, Meijuan Li, Qiang Shen, Haikun Chen
Summary: In this study, EP composites were prepared by filling different proportions of SiC particles and MoS2 powder, with modified MoS2/SiC/EP composites showing better tribological properties compared to unmodified counterparts. Specifically, composites containing 4 wt.% MoS2 exhibited the lowest average friction coefficient and volume wear rate, indicating significant improvements in friction and wear performance.
Article
Chemistry, Multidisciplinary
Mengmei Yang, Songlin Zuo, Xin Hu
Summary: By using graphite-like crystalline nanosheets (GCNs) with high hydrophilicity, high-concentration carbon nanomaterial aqueous suspensions (200 mg mL(-1)) are obtained. These high-concentration GCN suspensions can spontaneously transform into gels when induced by mono-, di-, and trivalent metal salt electrolytes at room temperature. The gelated GCNs represent a new and metastable state between solution and coagulation, and their gelation is attributed to the preferential orientation of nanosheets in an edge-edge arrangement.
Article
Engineering, Chemical
Hongjuan Hou, Jiaxing Pei, Dongxing Cao, Leilei Wang
Summary: A numerical method is proposed to evaluate the effect of non-Gaussian roughness on point contact elastohydrodynamic lubrication (EHL). Based on the mixed EHL model, the influence of non-Gaussian roughness parameters on contact pressure distribution, film thickness profile, and the ratio of asperity pressure to contact load is investigated. The results show that the asperity pressure and film thickness increase as the non-Gaussian roughness parameters increase.
LUBRICATION SCIENCE
(2024)
