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<p>This study aimed to employ orthogonal arrays for the rational arrangement of multi- factor and multi-level variables. In accordance with the row-column configuration of the orthogonal array, different levels of each factor were correspondingly assigned to nitrile rubber (NBR) specimens. Through specimen preparation, performance testing, and statistical analysis of experimental results, the optimal level combinations were determined. Based on the analytical findings, the most favourable levels for each factor affecting self-lubricating properties were selected. The theoretically optimal formulation involved specific lubricant types and addition levels, including polytetrafluoroethylene (PTFE), molybdenum disulphide (MoS₂), and Silicone emulsion. Combined with analyses using a CSM testing machine and evaluations via scanning electron microscopy (SEM), the mechanism by which lubricants such as PTFE, MoS₂, and silicone emulsion reduced friction and wear in NBR was investigated systematically. The optimal dosage was confirmed as 6 phr PTFE, 1 phr MoS₂, and 5 phr Silicone emulsion. The synergistic effect of this multi-component lubrication system enhanced the tribological properties of the rubber material through optimised dispersion of the lubricants within the NBR matrix. This work elucidated the regulatory mechanisms of self-lubricating modification: orthogonal experiments clarified the primary and secondary roles of each factor and their interactive effects, thereby revealing the interrelated patterns of “lubricant dispersion – formation of interfacial lubricating films – material wear mechanisms”.</p>

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Orthogonal design optimisation of lubricated NBR composites with PTFE, MoS2, and silicone emulsions

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Quanwang Feng,
  • Jiayi Zhan,
  • Zhaoqi Liu,
  • Baochang Dai,
  • Wenhui Han,
  • Shengqiang Xu,
  • Chuansheng Wang,
  • Huiguang Bian

摘要

This study aimed to employ orthogonal arrays for the rational arrangement of multi- factor and multi-level variables. In accordance with the row-column configuration of the orthogonal array, different levels of each factor were correspondingly assigned to nitrile rubber (NBR) specimens. Through specimen preparation, performance testing, and statistical analysis of experimental results, the optimal level combinations were determined. Based on the analytical findings, the most favourable levels for each factor affecting self-lubricating properties were selected. The theoretically optimal formulation involved specific lubricant types and addition levels, including polytetrafluoroethylene (PTFE), molybdenum disulphide (MoS₂), and Silicone emulsion. Combined with analyses using a CSM testing machine and evaluations via scanning electron microscopy (SEM), the mechanism by which lubricants such as PTFE, MoS₂, and silicone emulsion reduced friction and wear in NBR was investigated systematically. The optimal dosage was confirmed as 6 phr PTFE, 1 phr MoS₂, and 5 phr Silicone emulsion. The synergistic effect of this multi-component lubrication system enhanced the tribological properties of the rubber material through optimised dispersion of the lubricants within the NBR matrix. This work elucidated the regulatory mechanisms of self-lubricating modification: orthogonal experiments clarified the primary and secondary roles of each factor and their interactive effects, thereby revealing the interrelated patterns of “lubricant dispersion – formation of interfacial lubricating films – material wear mechanisms”.