Nanolubricants, thanks to their ability to reduce friction and wear, are increasingly studied in the transport and automotive sectors. These systems are generally produced with a two‐step procedure by dispersing nanoparticles into base oils. Very recently, one‐step methods have received increasing attention for the production of highly stable nanosuspensions at lower cost. Degradation‐decomposition of the base oil can however occur during the synthesis affecting the final performances. In this work, copper‐based nanolubricants were produced using a new procedure that preserves the base oil from the degradation induced by the synthesis and allows producing highly stable nanolubricant. The produced fluid showed a monodisperse distribution of nanometric particles and a good stability up to at least 60 days from its production. The as‐produced nanolubricants showed notable performance reducing the friction coefficient even up to 32.7% for Cu concentration of 0.01 vol% at 80°C.

中文翻译：

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润滑油机油中稳定的铜基纳米颗粒悬浮液的简便制备方法

纳米润滑剂由于具有减少摩擦和磨损的能力，因此在运输和汽车领域得到了越来越多的研究。这些系统通常是通过将纳米颗粒分散到基础油中的两步过程生产的。最近，一步法越来越受到关注，以较低的成本生产高度稳定的纳米悬浮液。但是，基础油会在合成过程中发生降解分解，从而影响最终性能。在这项工作中，使用一种新的程序生产了铜基纳米润滑剂，该程序可以保护基础油免受合成引起的降解，并可以生产高度稳定的纳米润滑剂。所生产的流体显示出纳米颗粒的单分散分布，并且自其生产起直至至少60天都具有良好的稳定性。