Fabrication of ionic liquid-functionalized carbon dots as lubricant additive for friction and wear reduction

Shenghua Xue; Xiaozhi Zhang; Yi Wang; Guangkai Jin; Shujuan Liu; Qian Ye; Weimin Liu

doi:10.1016/j.triboint.2024.110227

Fabrication of ionic liquid-functionalized carbon dots as lubricant additive for friction and wear reduction

Shenghua Xue, Xiaozhi Zhang, Yi Wang, Guangkai Jin, Shujuan Liu, Qian Ye, Weimin Liu

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Herein, a long-chain ionic liquid with the catecholic group was successfully synthesized and then grafted to the carbon dots surface (CDs-ILs-Br) via the self-assembly capability of catecholic compound. The resulting CDs-ILs-Br exhibit excellent dispersion stability in PEG200, maintaining a uniform dispersion for over one month. With the addition of 3.0 wt% CDs-ILs-Br, the average COF of base oil decreased to 0.113, resulting in 60 % reduction in wear volume. Furthermore, the introduction of anti-wear agent BF₄^- further reduced average COF to 0.093. XPS and EDS analysis confirm complex tribochemical reactions between CDs-ILs-Br and the friction pair, and the grafting polar molecules of ILs on the carbon dots surface enhanced adhesion effect under high shear condition, forming a robust tribochemical protective film.

Original language	English
Article number	110227
Journal	Tribology International
Volume	201
DOIs	https://doi.org/10.1016/j.triboint.2024.110227
State	Published - Jan 2025

Keywords

Carbon dots
Dispersion stability
Ionic liquid
Lubricant additive

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10.1016/j.triboint.2024.110227

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title = "Fabrication of ionic liquid-functionalized carbon dots as lubricant additive for friction and wear reduction",

abstract = "Herein, a long-chain ionic liquid with the catecholic group was successfully synthesized and then grafted to the carbon dots surface (CDs-ILs-Br) via the self-assembly capability of catecholic compound. The resulting CDs-ILs-Br exhibit excellent dispersion stability in PEG200, maintaining a uniform dispersion for over one month. With the addition of 3.0 wt% CDs-ILs-Br, the average COF of base oil decreased to 0.113, resulting in 60 % reduction in wear volume. Furthermore, the introduction of anti-wear agent BF4- further reduced average COF to 0.093. XPS and EDS analysis confirm complex tribochemical reactions between CDs-ILs-Br and the friction pair, and the grafting polar molecules of ILs on the carbon dots surface enhanced adhesion effect under high shear condition, forming a robust tribochemical protective film.",

keywords = "Carbon dots, Dispersion stability, Ionic liquid, Lubricant additive",

author = "Shenghua Xue and Xiaozhi Zhang and Yi Wang and Guangkai Jin and Shujuan Liu and Qian Ye and Weimin Liu",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Ltd",

year = "2025",

month = jan,

doi = "10.1016/j.triboint.2024.110227",

language = "英语",

volume = "201",

journal = "Tribology International",

issn = "0301-679X",

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TY - JOUR

T1 - Fabrication of ionic liquid-functionalized carbon dots as lubricant additive for friction and wear reduction

AU - Xue, Shenghua

AU - Zhang, Xiaozhi

AU - Wang, Yi

AU - Jin, Guangkai

AU - Liu, Shujuan

AU - Ye, Qian

AU - Liu, Weimin

PY - 2025/1

Y1 - 2025/1

N2 - Herein, a long-chain ionic liquid with the catecholic group was successfully synthesized and then grafted to the carbon dots surface (CDs-ILs-Br) via the self-assembly capability of catecholic compound. The resulting CDs-ILs-Br exhibit excellent dispersion stability in PEG200, maintaining a uniform dispersion for over one month. With the addition of 3.0 wt% CDs-ILs-Br, the average COF of base oil decreased to 0.113, resulting in 60 % reduction in wear volume. Furthermore, the introduction of anti-wear agent BF4- further reduced average COF to 0.093. XPS and EDS analysis confirm complex tribochemical reactions between CDs-ILs-Br and the friction pair, and the grafting polar molecules of ILs on the carbon dots surface enhanced adhesion effect under high shear condition, forming a robust tribochemical protective film.

AB - Herein, a long-chain ionic liquid with the catecholic group was successfully synthesized and then grafted to the carbon dots surface (CDs-ILs-Br) via the self-assembly capability of catecholic compound. The resulting CDs-ILs-Br exhibit excellent dispersion stability in PEG200, maintaining a uniform dispersion for over one month. With the addition of 3.0 wt% CDs-ILs-Br, the average COF of base oil decreased to 0.113, resulting in 60 % reduction in wear volume. Furthermore, the introduction of anti-wear agent BF4- further reduced average COF to 0.093. XPS and EDS analysis confirm complex tribochemical reactions between CDs-ILs-Br and the friction pair, and the grafting polar molecules of ILs on the carbon dots surface enhanced adhesion effect under high shear condition, forming a robust tribochemical protective film.

KW - Carbon dots

KW - Dispersion stability

KW - Ionic liquid

KW - Lubricant additive

UR - http://www.scopus.com/inward/record.url?scp=85203507644&partnerID=8YFLogxK

U2 - 10.1016/j.triboint.2024.110227

DO - 10.1016/j.triboint.2024.110227

M3 - 文章

AN - SCOPUS:85203507644

SN - 0301-679X

VL - 201

JO - Tribology International

JF - Tribology International

M1 - 110227

ER -

Fabrication of ionic liquid-functionalized carbon dots as lubricant additive for friction and wear reduction

Abstract

Keywords

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