Experimental and molecular dynamics simulation study of the thermal conductivity mechanism of biolubricant-based functionalized silver/carbon black additives

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Heat and Mass Transfer Pub Date : 2024-11-15 DOI:10.1016/j.ijheatmasstransfer.2024.126412

Weiwei Guan , Xianjun Hou , Hua Jiang , Youheng Wang , Mohamed Kamal Ahmed Ali

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Abstract

Lubricant degradation under elevated temperatures is a critical challenge in the automobile and manufacturing sectors, which reduces the durability of machinery components. In this study, a new environmentally friendly castor oil-based lubricant was developed utilizing tert‑butylhydroquinone (TBHQ)-functionalized silver/carbon black (Ag/CB@TBHQ) nano-additives. Herein, the mechanism of thermal conductivity improvement in Ag/CB@TBHQ nanolubricant was investigated by experimental tests and molecular dynamics simulations. Furthermore, the hybrid Ag/CB@TBHQ nano-additive presented superior thermal conductivity compared to individual nano-additives (Ag or CB) under various concentrations and temperatures. Additionally, the study presented the improved tribological performance of a novel nanolubricant under various temperatures. In summary, our results will offer promising insights to enhance the heat transfer capability and tribological performance of mechanical systems.

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基于生物润滑剂的功能化银/炭黑添加剂导热机理的实验和分子动力学模拟研究

润滑油在高温下降解是汽车和制造业面临的一项严峻挑战，它会降低机械部件的耐用性。本研究利用叔丁基对苯二酚（TBHQ）功能化银/炭黑（Ag/CB@TBHQ）纳米添加剂开发了一种新型环保的蓖麻油基润滑剂。本文通过实验测试和分子动力学模拟研究了 Ag/CB@TBHQ 纳米润滑剂改善热导率的机理。此外，与单独的纳米添加剂（Ag 或 CB）相比，Ag/CB@TBHQ 混合纳米添加剂在不同浓度和温度下都具有更优越的导热性。此外，该研究还展示了新型纳米润滑剂在不同温度下的摩擦学性能。总之，我们的研究结果将为提高机械系统的传热能力和摩擦学性能提供有前途的见解。

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来源期刊

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer