Abstract Grease made from carbon nanotubes (CNTs) and carbon nanofibers (CNFs) have shown superior thermal conductivity. Thermal conductivity enhancements up to 545.9% over the base fluid are reported by loading 12 wt% of carbon nanofiber into NYE Blank Grease. The unexpected results in this paper also lead to an improved way to significantly enhance the thermal conductivity of greases while reducing the nanotube loading percentage. A carbon nanofiber loading of only 5 wt% leads to a 163.3% increase in thermal conductivity in NYE 758G grease. A loading of 1.4 wt% hydroxyl functionalized multi-wall nanotube (MWNT-OH) in Krytox XHT750 oil leads to a 37.8% increase in thermal conductivity. The new discovery detailed in this paper is that hydrogen bonding between nanotube and oil is the key element for a good conductivity performance. The introduction of hydrogen bonding in any form into the grease increases thermal conductivity. The grease structure is created by the sole thickeners which are carbon nanotubes and nanofibers. This makes the grease unique and valuable.

中文翻译：

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氢键增强导热碳纳米润滑脂

摘要 由碳纳米管 (CNTs) 和碳纳米纤维 (CNFs) 制成的润滑脂显示出优异的导热性。通过将 12 wt% 的碳纳米纤维加载到 NYE Blank Grease 中，热导率比基液提高了 545.9%。这篇论文中的意外结果也导致了一种改进的方法，可以显着提高润滑脂的导热性，同时降低纳米管负载百分比。仅 5 wt% 的碳纳米纤维负载导致 NYE 758G 润滑脂的热导率增加 163.3%。在 Krytox XHT750 油中加入 1.4 wt% 的羟基官能化多壁纳米管 (MWNT-OH) 导致热导率增加 37.8%。本文详细介绍的新发现是，纳米管和油之间的氢键是良好导电性能的关键因素。在润滑脂中引入任何形式的氢键都会增加导热性。润滑脂结构是由碳纳米管和纳米纤维的唯一增稠剂产生的。这使得润滑脂独一无二且有价值。