ISSN   1004-0595

CN  62-1095/O4

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何国荣, 袁军亚, 李勇, 吴良飞, 门学虎. 二硫化钼/硫化锌纳米粉体的制备及其改性聚酰亚胺复合材料的摩擦学性能研究[J]. 摩擦学学报, 2022, 42(2): 265-274. DOI: 10.16078/j.tribology.2021047
引用本文: 何国荣, 袁军亚, 李勇, 吴良飞, 门学虎. 二硫化钼/硫化锌纳米粉体的制备及其改性聚酰亚胺复合材料的摩擦学性能研究[J]. 摩擦学学报, 2022, 42(2): 265-274. DOI: 10.16078/j.tribology.2021047
HE Guorong, YUAN Junya, LI Yong, WU Liangfei, MEN Xuehu. Preparation of MoS2/ZnS Nano-Powder and Tribological Behavior of MoS2/ZnS nano-powder Reinforced Polyimide Composites[J]. TRIBOLOGY, 2022, 42(2): 265-274. DOI: 10.16078/j.tribology.2021047
Citation: HE Guorong, YUAN Junya, LI Yong, WU Liangfei, MEN Xuehu. Preparation of MoS2/ZnS Nano-Powder and Tribological Behavior of MoS2/ZnS nano-powder Reinforced Polyimide Composites[J]. TRIBOLOGY, 2022, 42(2): 265-274. DOI: 10.16078/j.tribology.2021047

二硫化钼/硫化锌纳米粉体的制备及其改性聚酰亚胺复合材料的摩擦学性能研究

Preparation of MoS2/ZnS Nano-Powder and Tribological Behavior of MoS2/ZnS nano-powder Reinforced Polyimide Composites

  • 摘要: 采用一步水热法设计制备了二硫化钼/硫化锌(MoS2/ZnS)纳米杂化体,并利用热压成型技术得到聚酰亚胺/二硫化钼/硫化锌(PI/MoS2/ZnS)复合材料. 采用扫描电子显微镜、透射电子显微镜、X射线衍射仪以及光电子能谱仪对所制备材料的形貌和化学组成进行表征,结果表明MoS2纳米薄片均匀致密地包覆在ZnS纳米颗粒表面. 热重分析和差示扫描量热曲线结果表明,MoS2/ZnS纳米杂化体的引入显著地提升了PI基体的热稳定性能. 摩擦磨损测试结果表明,三种填料(MoS2,ZnS和MoS2/ZnS)均能有效改善PI基体的摩擦学性能,其中MoS2/ZnS纳米杂化体的增强效应最为显著,这主要归因于MoS2纳米片和ZnS纳米粒子之间的协同增强效应. 当MoS2/ZnS纳米杂化体的质量分数为1.5%时, PI/MoS2/ZnS复合材料的摩擦学性能达到最优,相较于纯的PI,复合材料的摩擦系数和磨损率分别下降了15. 9%和34. 3%.

     

    Abstract: Friction and wear are one of the main causes of material failure and waste of resources. Therefore, it is particularly urgent to develop new high-performance lubricating materials to reduce the friction and wear of moving parts. Polyimide (PI) has increasingly become an important engineering material in industrial production and life due to its excellent thermal stability, mechanical properties and excellent anti-solvent and anti-radiation properties, which is widely used in automotive, aerospace, transportation and other fields. However, single component PI material is difficult to meet the requirements of engineering materials for friction and wear properties. Molybdenum disulfide (MoS2) is a two-dimensional layered material. Its layers are connected by weak van der Waals forces. When subjected to external shear, it is easy to produce relative motion and slip. Based on this feature, MoS2 become an extremely important solid lubricating additive. However, MoS2 will spontaneously oxidize and absorb moisture in the air during the friction process, resulting in a significant reduction in lubrication and wear resistance life. Meanwhile, Zinc sulfide (ZnS), as a metal sulfide with a wide range of uses, has also gained certain applications in the field of anti-friction and anti-wear. In summary, MoS2 and ZnS nanomaterials are widely used in the field of anti-friction and anti-wear, either alone or in combination with other materials. However, there is no report on the synergistic enhancement of the tribological properties by MoS2 and ZnS. Therefore, in this paper, the MoS2/ZnS hybrid was synthesized by a one-step hydrothermal method to study the friction and wear properties of the PI resin matrix composites, and the synergistic enhancement effects of MoS2 and ZnS nanoparticles on the PI composites were further explored by the friction measurements. The molybdenum disulfide/zinc sulphide (MoS2/ZnS) nano-hybrid was synthesized by one-step hydrothermal method, and then polyimide/molybdenum disulfide/zinc sulphide (PI/MoS2/ZnS) composites were obtained by hot-pressing technology. The morphology and chemical composition of the prepared MoS2/ZnS nano-hybrid were characterized by SEM (Scanning electron microscope), TEM (Transmission electron microscope), XRD (X-ray diffraction) and XPS (X-ray photoelectron spectroscopy) to prove the formation of MoS2/ZnS nano-hybrid. The results of thermogravimetric analysis and differential scanning calorimetry showed that the introduction of MoS2/ZnS nano-hybrid significantly improved the thermal stability of PI matrix. The friction and wear test results showed that all the three fillers (MoS2, ZnS, MoS2/ZnS) could effectively improve the tribological properties of polyimide matrix, while the MoS2/ZnS nano-hybrid presented the optimal enhancement effect. When the mass fraction of MoS2/ZnS nano-hybrid was 1.5%, the tribological properties of PI/MoS2/ZnS composites were the optimal. Compared with pure polyimide, the friction coefficient and wear rate of PI/MoS2/ZnS composites were reduced by 15.9% and 34.3%, respectively. This was mainly due to the synergistic enhancement effect of the MoS2/ZnS hybrid on PI composites. During the friction process of PI/MoS2/ZnS composites, MoS2 nanosheets promote the formation of friction transfer films, while ZnS nanoparticles enhance the load-bearing capacity of the composites. In addition, the friction transfer film formed on the counterpart surface of the PI/MoS2/ZnS composite material was also more uniform and dense, further confirming that the PI/MoS2/ZnS composite material present the most excellent tribological properties.

     

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