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In situ fabrication of carbon dots-based lubricants using a facile ultrasonic approach

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Abstract

Mechanical friction and wear account for approximately one third of the present global energy consumption. However, it is still a challenge to prepare an efficient lubricant using a green and facile methodology. Herein, for the first time, we report an in situ green, high-yield and large-scale preparation of carbon dots (CDs)-based lubricants derived from low-cost precursors, including citric acid (CA), urea and poly(ethylene glycol) (PEG), via facile ultrasonic processing. The as-obtained lubricant without any post-treatment possesses a super-low mean friction coefficient of 0.02 and a wear scar diameter (WSD) of 0.55 mm determined using a four-ball tester under 600 N. To the best of our knowledge, the as-prepared lubricant displays the best friction-reducing and antiwear performance to date. The highly efficient lubricating properties of the as-obtained lubricant should be assigned to the CDs in lubricants with surface passivation, a carbon core and small size, providing a rolling effect.

Graphical abstract: In situ fabrication of carbon dots-based lubricants using a facile ultrasonic approach

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Publication details

The article was received on 24 Dec 2018, accepted on 22 Feb 2019 and first published on 22 Feb 2019


Article type: Paper
DOI: 10.1039/C8GC04021D
Citation: Green Chem., 2019, Advance Article

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    In situ fabrication of carbon dots-based lubricants using a facile ultrasonic approach

    C. He, H. Yan, X. Li and X. Wang, Green Chem., 2019, Advance Article , DOI: 10.1039/C8GC04021D

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