机械剪切对聚脲润滑脂增稠剂微观结构和性能的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2025-03-18 DOI:10.1016/j.triboint.2025.110655

Peng Ding , Wenhui Cao , Qi Ding , Chaobin Liu , Wei Yu , Litian Hu

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引用次数: 0

摘要

聚脲（PU）润滑脂在恶劣的工作条件下得到了广泛的应用。虽然聚氨酯分子和热处理条件对聚氨酯润滑脂微观结构和性能的影响已经很好地阐明，但机械剪切的影响尚不清楚。研究了生产过程中机械剪切对辛胺和4,4′-二苯基甲烷二异氰酸酯聚氨酯润滑脂结构和性能的影响。结果表明，静态热处理产生纳米管结构，而搅拌热处理产生扭曲纤维。剪切流对这些构造的形成有影响。纳米管聚氨酯润滑脂具有较低的稠度和较好的高速润滑性能，而扭曲纤维润滑脂具有较高的稠度和稳定性，适合于边界润滑。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The influence of mechanical shearing on the thickener microstructure and properties of Polyurea greases

Polyurea (PU) greases have found widespread applications in harsh working conditions. While the influence of PU molecule and thermal treatment condition on the microstructure and properties of PU greases has been well elucidated, the impact of mechanical shearing remains unclear. This study explored how mechanical shearing during production affects the structure and properties of PU grease made from octylamine and 4,4′-diphenylmethane diisocyanate. It was found that static heat treatment leads to nanotube structures, while stirred heat treatment creates twisted fibers. Shearing flow is shown to influence the formation of these structures. The nanotube PU grease has lower consistency and better lubrication for high-speed conditions, while the twisted fiber grease offers higher consistency and stability, suited for boundary lubrication.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.