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

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%.

A MoS₂/ZnS nanohybrid was designed and fabricated via a one-step hydrothermal method, and a polyimide/MoS₂/ZnS (PI/MoS₂/ZnS) composite was subsequently prepared using hot-pressing molding technology. The as-prepared materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) to analyze their morphology and chemical composition. The results revealed that MoS₂ nanosheets uniformly and densely coated the surfaces of ZnS nanoparticles. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) results demonstrated that the incorporation of MoS₂/ZnS nanohybrids significantly improved the thermal stability of the PI matrix. Friction and wear test results showed that all three fillers (MoS₂, ZnS, and MoS₂/ZnS) could effectively enhance the tribological properties of the PI matrix, among which the MoS₂/ZnS nanohybrids exhibited the most prominent reinforcing effect, which was mainly attributed to the synergistic reinforcement between MoS₂ nanosheets and ZnS nanoparticles. When the mass fraction of MoS₂/ZnS nanohybrids was 1.5%, the tribological properties of the PI/MoS₂/ZnS composite reached the optimum. Compared with neat PI, the friction coefficient and wear rate of the composite decreased by 15.9% and 34.3%, respectively.

搜集汇总

背景与挑战

背景概述

该数据集研究二硫化钼/硫化锌纳米杂化体的制备及其对聚酰亚胺复合材料摩擦学性能的改性。采用一步水热法和热压成型技术，通过表征确认MoS2纳米片均匀包覆ZnS纳米颗粒，并发现MoS2/ZnS能显著提升复合材料的热稳定性和摩擦学性能，最优条件下摩擦系数和磨损率分别下降15.9%和34.3%。