Zwitterionic dopamine sulfonate functionalized carbon quantum dots as water-based lubricant additive for friction and wear reduction

Shenghua Xue; Yuhong Cui; Xin Chen; Junqin Shi; Shujuan Liu; Qian Ye; Feng Zhou

doi:10.1016/j.apsusc.2023.156411

Zwitterionic dopamine sulfonate functionalized carbon quantum dots as water-based lubricant additive for friction and wear reduction

Shenghua Xue, Yuhong Cui, Xin Chen, Junqin Shi, Shujuan Liu, Qian Ye, Feng Zhou

School of Materials Sience and Engineering

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

34 Scopus citations

Abstract

In this work, we have successfully prepared carbon quantum dots with abundant edge-OH (CQDs-OH) via hydrothermal reaction, and then the zwitterionic dopamine sulfonate (ZDS) was self-assembled onto CQDs surface via chemical bond between the catechol group of ZDS and the edge-OH of CQDs. Due to the good dispersion stability of quantum dots endowed by ZDS, CQD-ZDS exhibits excellent lubricating effect as a water-based lubricating additive. Meanwhile, the tribochemical reaction induced by CQD-ZDS can form a stable carbon and metal oxide protective film on the wear surface. Compared with pure water, the average friction coefficient (COF) decreases from 0.5 to 0.11. The hydration process of ZDS modified CQDs is simulated by molecular dynamics simulation, and its lubricating mechanism is explored.

Original language	English
Article number	156411
Journal	Applied Surface Science
Volume	615
DOIs	https://doi.org/10.1016/j.apsusc.2023.156411
State	Published - 1 Apr 2023

Keywords

Carbon quantum dots
Self-assembly
Water-based lubricant additive
Zwitterionic dopamine sulfonate

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10.1016/j.apsusc.2023.156411

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title = "Zwitterionic dopamine sulfonate functionalized carbon quantum dots as water-based lubricant additive for friction and wear reduction",

abstract = "In this work, we have successfully prepared carbon quantum dots with abundant edge-OH (CQDs-OH) via hydrothermal reaction, and then the zwitterionic dopamine sulfonate (ZDS) was self-assembled onto CQDs surface via chemical bond between the catechol group of ZDS and the edge-OH of CQDs. Due to the good dispersion stability of quantum dots endowed by ZDS, CQD-ZDS exhibits excellent lubricating effect as a water-based lubricating additive. Meanwhile, the tribochemical reaction induced by CQD-ZDS can form a stable carbon and metal oxide protective film on the wear surface. Compared with pure water, the average friction coefficient (COF) decreases from 0.5 to 0.11. The hydration process of ZDS modified CQDs is simulated by molecular dynamics simulation, and its lubricating mechanism is explored.",

keywords = "Carbon quantum dots, Self-assembly, Water-based lubricant additive, Zwitterionic dopamine sulfonate",

author = "Shenghua Xue and Yuhong Cui and Xin Chen and Junqin Shi and Shujuan Liu and Qian Ye and Feng Zhou",

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doi = "10.1016/j.apsusc.2023.156411",

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T1 - Zwitterionic dopamine sulfonate functionalized carbon quantum dots as water-based lubricant additive for friction and wear reduction

AU - Xue, Shenghua

AU - Cui, Yuhong

AU - Chen, Xin

AU - Shi, Junqin

AU - Liu, Shujuan

AU - Ye, Qian

AU - Zhou, Feng

PY - 2023/4/1

Y1 - 2023/4/1

N2 - In this work, we have successfully prepared carbon quantum dots with abundant edge-OH (CQDs-OH) via hydrothermal reaction, and then the zwitterionic dopamine sulfonate (ZDS) was self-assembled onto CQDs surface via chemical bond between the catechol group of ZDS and the edge-OH of CQDs. Due to the good dispersion stability of quantum dots endowed by ZDS, CQD-ZDS exhibits excellent lubricating effect as a water-based lubricating additive. Meanwhile, the tribochemical reaction induced by CQD-ZDS can form a stable carbon and metal oxide protective film on the wear surface. Compared with pure water, the average friction coefficient (COF) decreases from 0.5 to 0.11. The hydration process of ZDS modified CQDs is simulated by molecular dynamics simulation, and its lubricating mechanism is explored.

AB - In this work, we have successfully prepared carbon quantum dots with abundant edge-OH (CQDs-OH) via hydrothermal reaction, and then the zwitterionic dopamine sulfonate (ZDS) was self-assembled onto CQDs surface via chemical bond between the catechol group of ZDS and the edge-OH of CQDs. Due to the good dispersion stability of quantum dots endowed by ZDS, CQD-ZDS exhibits excellent lubricating effect as a water-based lubricating additive. Meanwhile, the tribochemical reaction induced by CQD-ZDS can form a stable carbon and metal oxide protective film on the wear surface. Compared with pure water, the average friction coefficient (COF) decreases from 0.5 to 0.11. The hydration process of ZDS modified CQDs is simulated by molecular dynamics simulation, and its lubricating mechanism is explored.

KW - Carbon quantum dots

KW - Self-assembly

KW - Water-based lubricant additive

KW - Zwitterionic dopamine sulfonate

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U2 - 10.1016/j.apsusc.2023.156411

DO - 10.1016/j.apsusc.2023.156411

M3 - 文章

AN - SCOPUS:85146437348

SN - 0169-4332

VL - 615

JO - Applied Surface Science

JF - Applied Surface Science

M1 - 156411

ER -

Zwitterionic dopamine sulfonate functionalized carbon quantum dots as water-based lubricant additive for friction and wear reduction

Abstract

Keywords

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