Investigation of tribological performance of the ultra-dispersive TBC-CNTs as additives for aqueous lubrication

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2024-07-25 DOI:10.1016/j.wear.2024.205513

{"title":"Investigation of tribological performance of the ultra-dispersive TBC-CNTs as additives for aqueous lubrication","authors":"","doi":"10.1016/j.wear.2024.205513","DOIUrl":null,"url":null,"abstract":"<div><p>Carbon nanotubes (CNTs), as water-based additives, are potential candidates for reducing friction and wear whereas the weak dispersion stability impedes their application in aqueous lubrication. Therefore, CNTs were functionally modified by 4-tert-butylcatechol (TBC) nucleophilic for synthesizing the ultra-dispersive TBC-CNTs. The particle sizes and dispersibility of TBC-CNTs in water were investigated. It was found that particle sizes of the most of CNTs were reduced after modification and 0.035 wt% TBC-CNTs remained uniformly dispersed in water for 2 months. The lubrication behavior of TBC-CNTs as water-based additives for ceramic/steel tribo-pairs was investigated by using a ball-on-disc apparatus. Notably, the optimum concentration of TBC-CNTs was determined 0.2 wt% that contributed to 30.6 % of friction reduction and 28.3 % of wear resistance, respectively, at 0.6 m/s and 8 N. The tiny structure of TBC-CNTs contributed to their entrance into the contact interface and playing lubricating roles. Furtherly, the increase of water film thickness within contacts and formation of lubrication film on rubbing surfaces caused by TBC-CNTs addition resulted in the friction and wear reduction.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Wear","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0043164824002783","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Carbon nanotubes (CNTs), as water-based additives, are potential candidates for reducing friction and wear whereas the weak dispersion stability impedes their application in aqueous lubrication. Therefore, CNTs were functionally modified by 4-tert-butylcatechol (TBC) nucleophilic for synthesizing the ultra-dispersive TBC-CNTs. The particle sizes and dispersibility of TBC-CNTs in water were investigated. It was found that particle sizes of the most of CNTs were reduced after modification and 0.035 wt% TBC-CNTs remained uniformly dispersed in water for 2 months. The lubrication behavior of TBC-CNTs as water-based additives for ceramic/steel tribo-pairs was investigated by using a ball-on-disc apparatus. Notably, the optimum concentration of TBC-CNTs was determined 0.2 wt% that contributed to 30.6 % of friction reduction and 28.3 % of wear resistance, respectively, at 0.6 m/s and 8 N. The tiny structure of TBC-CNTs contributed to their entrance into the contact interface and playing lubricating roles. Furtherly, the increase of water film thickness within contacts and formation of lubrication film on rubbing surfaces caused by TBC-CNTs addition resulted in the friction and wear reduction.

查看原文本刊更多论文

超分散 TBC-CNT 作为水性润滑添加剂的摩擦学性能研究

碳纳米管（CNTs）作为水基添加剂，是减少摩擦和磨损的潜在候选物质，但其分散稳定性较弱，阻碍了其在水性润滑中的应用。因此，通过亲核 4-叔丁基邻苯二酚（TBC）对 CNT 进行功能修饰，合成了超分散 TBC-CNT。研究了 TBC-CNTs 的粒径和在水中的分散性。结果表明，改性后大部分 TBC-CNT 的粒径减小，0.035 wt% 的 TBC-CNT 在水中均匀分散达 2 个月之久。通过使用盘上球装置研究了 TBC-CNT 作为陶瓷/钢三元对水基添加剂的润滑行为。TBC-CNT 的微小结构有助于它们进入接触界面并发挥润滑作用。此外，TBC-CNT 的加入增加了接触面内的水膜厚度，并在摩擦表面形成了润滑膜，从而减少了摩擦和磨损。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.