Zwitterionic microgel-functionalized gallium-based liquid-metal nanodroplets as aqueous lubricant additives

被引：37

作者：

He, Baoluo ^{[1
]}

Wang, Peng ^{[1
]}

Lu, Qi ^{[1
]}

Du, Yixuan ^{[1
]}

Liu, Shujuan ^{[1
]}

Ye, Qian ^{[1
]}

Zhou, Feng ^{[1
,2
]}

Liu, Weimin ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, Ctr Adv Lubricat & Seal Mat, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2023年 / 177卷

基金：

中国国家自然科学基金;

关键词：

Water -based lubricant additives; Zwitterionic microgel; Gallium -based liquid -metal; Surface modification; NANOPARTICLES; PERFORMANCE;

D O I：

10.1016/j.triboint.2022.107952

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Herein, a bioinspired molecule-dopamine n-butenylamide-was self-assembled on Gallium-based liquid metal (GLM) nanodroplets to introduce vinyl group, and the zwitterionic poly (2-methylacryloxyethyl phosphocholine) (PMPC) was grafted onto GLM nanodroplets via surface-initiated free radical polymerization to obtain hybrid PMPC-GLM microgel. The as-prepared PMPC-GLM microgel has good dispersion stability in aqueous solution (chemical stability > 2 months), and shows excellent antibacterial properties due to the hydration of PMPC and antibacterial effect of Ga3+. Moreover, the hydration layer endows PMPC-GLM microgel with satisfactory tribological properties as an aqueous lubricant additive, with the COF and wear rate reduced by 65% and 62%. In addition to hydration lubrication, the improved tribological performance is attributed to the formation of pro-tective film on the worn surface.

引用

页数：9

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