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Lubricants
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Tribology of 2D Nanomaterials and Active Control of Friction Behavior
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Tribology of 2D Nanomaterials and Active Control of Friction Behavior

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: closed (30 June 2025) | Viewed by 1892

Special Issue Editors

Dr. Yanfei Liu

E-Mail Website
Guest Editor
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: solid lubrication; 2D materials; composites; nanoadditives; tribochemical reaction
Special Issues, Collections and Topics in MDPI journals
Dr. Xiangyu Ge

E-Mail Website
Guest Editor
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: superlubricity; graphene materials; bearing lubrication; friction tuning
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Friction and wear between machine pairs always causes excessive energy losses and even mechanical failures in industrial applications. To overcome these problems, researchers have focused on enhancing the performance of lubricants, particularly concerning their reductions in energy dissipation and improvement to durability. Recently, many 2D materials have been used as solid lubricants at the nano/microscales or macroscales, applied as fillers of composites or added to lubricants as additives to enhance lubrication and wear protection performances. These 2D materials exhibit different tribological behaviors, which are valuable to investigate for the development of novel lubrication systems.

The overwhelmingly positive feedback from readers for the first edition of this Special Issue went beyond what we had envisioned, and consequently, in partnership with the Editorial Office of Lubricants, we are delighted to announce the release of the second edition of this Special Issue, titled “Tribology of 2D Nanomaterials and Tuning of Friction Behavior”. This edition explores the most recent advancements in the tribological properties of 2D nanomaterials, as well as cutting-edge progress in tuning techniques for friction behavior.

Dr. Yanfei Liu
Dr. Xiangyu Ge
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • friction and wear
  • nanoadditive
  • lubrication mechanism
  • synergetic effect
  • surface modification
  • structural regulation
  • material characterization
  • active controllable friction

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Related Special Issue

Published Papers (2 papers)

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Research

27 pages, 5180 KiB  
Article
Nano-Enhanced Cactus Oil as an MQL Cutting Fluid: Physicochemical, Rheological, Tribological, and Machinability Insights into Machining H13 Steel
by Nada K. ElBadawy, Mohamed G. A. Nassef, Ibrahem Maher, Belal G. Nassef, Mohamed A. Daha, Florian Pape and Galal A. Nassef
Lubricants 2025, 13(6), 267; https://doi.org/10.3390/lubricants13060267 - 15 Jun 2025
Viewed by 637
Abstract
The widespread use of mineral cutting fluids in metalworking poses challenges due to their poor wettability, toxicity, and non-biodegradability. This study explores cactus oil-based nanofluids as sustainable alternatives for metal cutting applications. Samples of cactus oil are prepared in plain form and with [...] Read more.
The widespread use of mineral cutting fluids in metalworking poses challenges due to their poor wettability, toxicity, and non-biodegradability. This study explores cactus oil-based nanofluids as sustainable alternatives for metal cutting applications. Samples of cactus oil are prepared in plain form and with 0.025 wt.%, 0.05 wt.%, and 0.1 wt.% activated carbon nanoparticles (ACNPs) from recycled plastic waste. Plain cactus oil exhibited a 34% improvement in wettability over commercial soluble oil, further enhanced by 60% with 0.05 wt.% ACNPs. Cactus oil displayed consistent Newtonian behavior with a high viscosity index (283), outperforming mineral-based cutting fluid in thermal stability. The addition of ACNPs enhanced the dynamic viscosity by 108–130% across the temperature range of 40–100 °C. The presence of nano-additives reduced the friction coefficient in the boundary lubrication zone by a maximum reduction of 32% for CO2 compared to plain cactus oil. The physical and rheological results translated directly to the observed improvements in surface finish and tool wear during machining operations on H13 steel. Cactus oil with 0.05 wt.% ACNP outperformed conventional fluids, reducing surface roughness by 35% and flank wear by 57% compared to dry. This work establishes cactus oil-based nanofluids as a sustainable alternative, combining recycled waste-derived additives and non-edible feedstock for greener manufacturing. Full article
(This article belongs to the Special Issue Tribology of 2D Nanomaterials and Active Control of Friction Behavior)
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12 pages, 17499 KiB  
Article
Comparative Study of the Friction Behavior of Functionalized Graphene Oxide Additives Under Electric Stimulations
by Linghao Zhang, Qiuyu Shi and Xiangyu Ge
Lubricants 2024, 12(12), 455; https://doi.org/10.3390/lubricants12120455 - 19 Dec 2024
Cited by 1 | Viewed by 845
Abstract
Electro-regulated friction is a widely adopted approach for reducing friction, with graphene oxide (GO) emerging as a promising lubricating additive due to its electro-responsive frictional behaviour. However, with the wide variety of functionalized GO additives available, each exhibiting distinct properties, it remains unclear [...] Read more.
Electro-regulated friction is a widely adopted approach for reducing friction, with graphene oxide (GO) emerging as a promising lubricating additive due to its electro-responsive frictional behaviour. However, with the wide variety of functionalized GO additives available, each exhibiting distinct properties, it remains unclear which type demonstrates the most effective electro-regulated friction-reducing performance, limiting their broader industrial application. In this study, the frictional behaviour of three functionalized GO additives under electric stimulation was investigated along with an analysis of the corresponding worn surfaces. The findings reveal the role of functional groups in determining the tribological performance of functionalized GO additives and the mechanism of electric stimulation. Notably, the formation of ester groups during the friction process of GO-OH enhances the adsorption of GO additives onto steel surfaces, resulting in superior friction-reducing properties. Under lubrication with GO-OH additives, negative electric stimulation promotes the generation of ester groups and transitions the lubrication regime to mixed lubrication, thereby contributing to friction reduction. This work provides new insights into the tribological performance of functionalized GO additives and the mechanisms underlying their electro-regulated behaviours, laying a foundation for the design of GO additives with superior lubrication performance for practical engineering applications. Full article
(This article belongs to the Special Issue Tribology of 2D Nanomaterials and Active Control of Friction Behavior)
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