MoS2与有序取向CNTs协同增强环氧复合材料边界润滑特性研究

王进; 雷文星; 张雅君; 仝哲

doi:10.3969/j.issn.1674-6457.2026.03.022

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精密成形工程 ›› 2026, Vol. 18 ›› Issue (3) : 210-219. DOI: 10.3969/j.issn.1674-6457.2026.03.022

复合材料成形

MoS₂与有序取向CNTs协同增强环氧复合材料边界润滑特性研究

王进¹, 雷文星², 张雅君³, 仝哲^3,*

作者信息 +

Tribological Properties of Epoxy Nanocomposites Reinforced by MoS₂ Nanosheets and Aligned MWCNTs under Boundary Lubrication Conditions

WANG Jin¹, LEI Wenxing², ZHANG Yajun³, TONG Zhe^3,*

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摘要

目的探究有序取向CNTs与MoS₂协同增强环氧复合材料在边界润滑条件下的摩擦学性能以及摩擦、磨损机制。方法通过对比纯环氧树脂、CNTs随机分布以及CNTs轴向平行、垂直于滑动方向的复合材料,系统分析了环氧复合材料在室温与高温（80 ℃）边界润滑状态下的摩擦、磨损特性。采用UMT-2摩擦试验机、SEM、三维轮廓仪及有限元分析,揭示了温度对取向复合材料边界润滑特性的影响规律与潜在的作用机制。结果在边界润滑条件下,复合材料表现出优异的润滑特性（摩擦系数均低于0.1）,且CNTs取向显著影响界面摩擦学行为,当滑动方向垂直于CNTs轴向时,材料展现出最优综合性能,与纯环氧相比,其室温摩擦系数（0.06）降低了48%,磨痕宽度减小了35%。这主要归结为垂直取向的CNTs通过应力梯度优化提升了复合材料的承载能力,同时协同MoS₂纳米片在配副表面形成连续润滑膜,抑制了犁沟磨损。在高温（80 ℃）环境下,润滑油成膜能力增强及添加剂活性提升,使摩擦系数进一步降至0.05、复合材料磨损量减少。结论当CNTs轴向垂直于滑动方向时,可优化载荷与基体应力分布,抑制表面犁沟和裂纹扩展,且有利于滑动界面温度的传导。同时CNTs与MoS₂对环氧复合材料边界润滑行为具有协同强化作用,为极端工况下高性能聚合物基耐磨材料的设计提供了理论指导。

Abstract

The work aims to investigate the tribological performance of epoxy composites synergistically reinforced by MoS₂ and aligned CNTs under boundary lubrication conditions. The friction and wear characteristics of pure epoxy, randomly dispersed, axially parallel, and vertically aligned CNTs composites were systematically analyzed at room temperature and elevated temperature (80 ℃) by UMT-2 tribometer, SEM, 3D profilometry, and finite element analysis. The lubrication and wear mechanisms in oil-lubricated environments under varying temperature were elucidated. Results demonstrated that oil lubrication significantly reduced the COF of all composites to below 0.1, with orientation-dependent interfacial tribological behaviors. The composite exhibited optimal comprehensive performance when the sliding direction was perpendicular to the axial direction of CNTs, achieving a room-temperature COF of 0.06 (48% reduction compared with pure epoxy) and reduced wear scar width (by 35%). This enhancement primarily attributed to stress gradient optimization via vertically aligned CNTs, which improved load-bearing capacity of composites. Meanwhile, the continuous lubricating film formatted through the synergistic effect of MoS₂ nanosheets and CNTs on the counterpart surface inhibited the furrow wear. Furthermore, as the ambient temperature rose to 80 ℃, enhanced oil film formation and additive activation further reduced the COF to 0.05 accompanied by the reduction of material loss. SEM characterization and finite element simulations confirmed that vertical MWCNTs alignment optimizes load distribution and matrix stress fields of composites, effectively inhibiting surface plowing and crack propagation. This work clarifies the synergistic strengthening mechanism of MWCNTs and MoS₂ on the boundary lubrication behavior of epoxy matrix composites, providing theoretical guidance for designing high-performance polymer-based wear-resistant materials under extreme operating conditions.

导出引用

王进, 雷文星, 张雅君, 仝哲. MoS₂与有序取向CNTs协同增强环氧复合材料边界润滑特性研究[J]. 精密成形工程. 2026, 18(3): 210-219 https://doi.org/10.3969/j.issn.1674-6457.2026.03.022

WANG Jin, LEI Wenxing, ZHANG Yajun, TONG Zhe. Tribological Properties of Epoxy Nanocomposites Reinforced by MoS₂ Nanosheets and Aligned MWCNTs under Boundary Lubrication Conditions[J]. Journal of Netshape Forming Engineering. 2026, 18(3): 210-219 https://doi.org/10.3969/j.issn.1674-6457.2026.03.022

中图分类号： TB332

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