Organic-modified ZnS nanoparticles as a high-performance lubricant additive
Abstract
Lubricants are essential in transportation vehicles and industrial machinery to improve the lifetime of moving components. Antiwear additives in lubricants significantly minimize wear and material removal due to friction. While a wide range of modified and unmodified nanoparticles (NPs) have been extensively studied as lubricant additives, fully oil-miscible and oil-transparent NPs are essential to improve performance and oil visibility. Here, we report dodecanethiol-modified oil-suspendable and optical-transparent ZnS nanoparticles (NPs) with a nominal diameter of 4 nm as antiwear additives to a non-polar base oil. The ZnS NPs formed a transparent and long-term stable suspension in a synthetic polyalphaolefin (PAO) lubricating oil. The ZnS NPs in PAO oil at 0.5 or 1.0 wt% concentration demonstrated excellent friction and wear protection. The synthesized ZnS NPs showed 98% wear reduction compared to the neat PAO4 base oil. For the first time, this report showed the outstanding tribological performance of the ZnS NPs benchmarked to the commercial antiwear additive zinc dialkyldithiophosphate (ZDDP) with an additional 40–70% wear reduction. Surface characterization revealed a ZnS-derived self-healing polycrystalline tribofilm (<250 nm), which is key to superior lubricating performance. Our results indicate the potential of ZnS NPs as a high-performance and competitive antiwear additive to ZDDP, which hasmore »
- Authors:
-
[1];
[1];
[1]
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
- Institute of Advanced Technology Development, Hyundai Motor Corporation, Republic of Korea
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1959257
- Alternate Identifier(s):
- OSTI ID: 1994739
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Published Article
- Journal Name:
- RSC Advances
- Additional Journal Information:
- Journal Name: RSC Advances Journal Volume: 13 Journal Issue: 10; Journal ID: ISSN 2046-2069
- Publisher:
- Royal Society of Chemistry (RSC)
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Kumara, Chanaka, Armstrong, Beth, Lyo, Inwoong, Lee, Hong Wook, and Qu, Jun. Organic-modified ZnS nanoparticles as a high-performance lubricant additive. United Kingdom: N. p., 2023.
Web. doi:10.1039/D2RA07295E.
Kumara, Chanaka, Armstrong, Beth, Lyo, Inwoong, Lee, Hong Wook, & Qu, Jun. Organic-modified ZnS nanoparticles as a high-performance lubricant additive. United Kingdom. https://doi.org/10.1039/D2RA07295E
Kumara, Chanaka, Armstrong, Beth, Lyo, Inwoong, Lee, Hong Wook, and Qu, Jun. Tue .
"Organic-modified ZnS nanoparticles as a high-performance lubricant additive". United Kingdom. https://doi.org/10.1039/D2RA07295E.
@article{osti_1959257,
title = {Organic-modified ZnS nanoparticles as a high-performance lubricant additive},
author = {Kumara, Chanaka and Armstrong, Beth and Lyo, Inwoong and Lee, Hong Wook and Qu, Jun},
abstractNote = {Lubricants are essential in transportation vehicles and industrial machinery to improve the lifetime of moving components. Antiwear additives in lubricants significantly minimize wear and material removal due to friction. While a wide range of modified and unmodified nanoparticles (NPs) have been extensively studied as lubricant additives, fully oil-miscible and oil-transparent NPs are essential to improve performance and oil visibility. Here, we report dodecanethiol-modified oil-suspendable and optical-transparent ZnS nanoparticles (NPs) with a nominal diameter of 4 nm as antiwear additives to a non-polar base oil. The ZnS NPs formed a transparent and long-term stable suspension in a synthetic polyalphaolefin (PAO) lubricating oil. The ZnS NPs in PAO oil at 0.5 or 1.0 wt% concentration demonstrated excellent friction and wear protection. The synthesized ZnS NPs showed 98% wear reduction compared to the neat PAO4 base oil. For the first time, this report showed the outstanding tribological performance of the ZnS NPs benchmarked to the commercial antiwear additive zinc dialkyldithiophosphate (ZDDP) with an additional 40–70% wear reduction. Surface characterization revealed a ZnS-derived self-healing polycrystalline tribofilm (<250 nm), which is key to superior lubricating performance. Our results indicate the potential of ZnS NPs as a high-performance and competitive antiwear additive to ZDDP, which has broad transportation and industrial applications.},
doi = {10.1039/D2RA07295E},
journal = {RSC Advances},
number = 10,
volume = 13,
place = {United Kingdom},
year = {Tue Feb 21 00:00:00 EST 2023},
month = {Tue Feb 21 00:00:00 EST 2023}
}
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