Rejvani Mousa, Heidari Alireza, Seadodin Seyfolah
Department of Mechanical Engineering, Semnan University, Semnan, Iran.
Department of Mechanical Engineering, Damghan University, Damghan, Iran.
Heliyon. 2023 Jan 12;9(2):e12942. doi: 10.1016/j.heliyon.2023.e12942. eCollection 2023 Feb.
Many scholars are attracted to nano-lubricants due to their unique properties. In the present study, the rheological behavior of a new generation of lubricants has been investigated. SiO nanoparticles with an average diameter of 20-30 nm along with MWCNT with an internal diameter of 3-5 nm and the external diameter of 5-15 nm has been dispersed in 10W40 engine oil as base-lubricant and MWCNTs-SiO2 (20%-80%)/10W40 hybrid nano-lubricant has been produced. Nano-lubricant behavior agrees with the Herschel-Bulkley model and is of Bingham pseudo-plastic type below . Also, in the temperature of , nano-lubricant behavior has changed to Bingham dilatant. The viscosity is increased by 32% in the proposed nano-lubricant compared to base lubricant (Dynamics Viscosity Enhancement). Finally, a new correlation with a precision index of R-squared >0.9800, Adj. R-squared >0.9800, and the maximum margin of deviation of 2.72% has been presented, increasing the applicability of this nano-lubricant. Eventually, the sensitivity analysis of nano-lubricant has been conducted, studying the comparative effect of volume fraction and temperature on viscosity.
许多学者因其独特性能而被纳米润滑剂所吸引。在本研究中，对新一代润滑剂的流变行为进行了研究。平均直径为20 - 30纳米的SiO纳米颗粒以及内径为3 - 5纳米、外径为5 - 15纳米的多壁碳纳米管（MWCNT）已被分散在10W40发动机油中作为基础润滑剂，并制备了MWCNTs - SiO2（20% - 80%）/10W40混合纳米润滑剂。纳米润滑剂的行为符合赫谢尔 - Bulkley模型，在低于[具体温度]时为宾汉假塑性类型。此外，在[具体温度]下，纳米润滑剂的行为转变为宾汉膨胀性。与基础润滑剂相比，所提出的纳米润滑剂的粘度增加了32%（动态粘度增强）。最后，提出了一种相关系数，其决定系数R² > 0.9800，调整后的决定系数Adj. R² > 0.9800，最大偏差幅度为2.72%，提高了这种纳米润滑剂的适用性。最终，对纳米润滑剂进行了敏感性分析，研究了体积分数和温度对粘度的比较影响。
