多壁碳纳米管和二氧化硅对冷却油流变行为的协同影响及敏感性分析

Simultaneous effects of MWCNT and SiO2 on the rheological behavior of cooling oil and sensitivity analysis.

作者信息

Rejvani Mousa, Heidari Alireza, Seadodin Seyfolah

机构信息

Department of Mechanical Engineering, Semnan University, Semnan, Iran.

Department of Mechanical Engineering, Damghan University, Damghan, Iran.

出版信息

Heliyon. 2023 Jan 12;9(2):e12942. doi: 10.1016/j.heliyon.2023.e12942. eCollection 2023 Feb.

DOI:10.1016/j.heliyon.2023.e12942

PMID:36793971

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9922931/

Abstract

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.

摘要

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。