A functionalized ionic liquid as the next‐generation nano‐lubricant
A functionalized ionic liquid as the next‐generation nano‐lubricant
复制标题
DOI：
10.1002/dro2.28
复制
发表时间：
2022-10
期刊：
影响因子：
--
通讯作者：
Bingchen Wang;Alan Tirado;Fan Yang;Catherine Moran;Meghan Vander Woude;Yihan Song;Xin Wang;Rui Qiao;Sofia Bai;Qian Guo;Huan Tang;Lei Li
中科院分区：
文献类型：
--
作者：
Bingchen Wang;Alan Tirado;Fan Yang;Catherine Moran;Meghan Vander Woude;Yihan Song;Xin Wang;Rui Qiao;Sofia Bai;Qian Guo;Huan Tang;Lei Li
离子液体以其优异的理化性质引起了人们的广泛关注。然而，全面的设计是有针对性的应用所必需的，很少进行。因此，集成电路的工业规模应用仍然非常有限。在这项由匹兹堡大学、弗吉尼亚理工大学和希捷科技有限责任公司合作进行的学术-工业合作研究中，我们报告了纳米厚度IL的设计、合成、分子动力学（MD）模拟和表征，该IL含有丰富的氟化段和羟基端基，作为硬盘驱动器（hdd）的下一代纳米润滑剂。实验室和工业水平的测试结果表明，IL润滑剂的性能明显优于最先进的润滑剂，即全氟聚醚（PFPE），该全氟聚醚已在硬盘行业使用了三十年，在两个关键功能：热稳定性和苍蝇清除。同时，IL润滑油也表现出优异的润滑性和耐久性。IL的优异性能归因于其在固体衬底上独特的分子结构，这一点得到了MD模拟结果的支持。我们的工作确定了IL作为HDD行业下一代介质润滑剂的候选产品。同时，这里获得的发现对涉及纳米润滑剂的许多其他应用具有重要意义。
Ionic liquids (ILs) have attracted intensive research interest due to their outstanding physiochemical properties. However, comprehensive design is necessary for targeted applications and has rarely been conducted. As a result, the industry‐scale application of ILs is still very limited. In this academia–industry collaborative research among the University of Pittsburgh, Virginia Tech. University, and Seagate Technology LLC, we report the design, synthesis, molecular dynamics (MD) simulation, and characterization of a nanometer‐thick IL, which contains abundant fluorinated segments and a hydroxyl endgroup, as the next‐generation nano‐lubricant for hard disk drives (HDDs). The lab‐ and industry‐level testing results indicate that the IL lubricant performs significantly better than the state‐of‐the‐art lubricant, that is, perfluoropolyether (PFPE) that has been utilized for three decades in the HDD industry in two key functions: thermal stability and fly clearance. Meanwhile, the IL lubricant also shows excellent lubricity and durability. The outstanding performance of the IL has been attributed to its unique molecular structure on the solid substrate, which is supported by MD simulation results. Our work establishes the IL as a promising candidate among the next‐generation media lubricants in HDD industry. Meanwhile, the finding obtained here has important implications in many other applications involving nano‐lubricants.