期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 266, 期 -, 页码 65-74出版社
ELSEVIER
DOI: 10.1016/j.molliq.2018.06.042
关键词
Nitrogen-doped carbon dots; Hydrophilicity and hydrophobicity; Lubricant nanoadditives; Tribological performance
资金
- National Natural Science Foundation of China [21404114]
- China Postdoctoral Science Foundation [2014M561797]
- Natural Science Foundation of Ningbo [2015A610051]
Nanosizing is considered as a promising approach for achieving better dispersibility of nanoparticles in mediums, while the regulation of their hydrophilicity and hydrophobicity is very important issue for wide application of nanoparticles. Herein, nitrogen-doped carbon dots (N-CDs) with hydrophilicity was prepared via namely bottom-up and exhibited excellent excitation-dependent maximum fluorescence at 480/560 nm, while a novel kind of liquid-like N-CDs with hydrophobicity was synthesized followed via covalent grafting stratagem and exhibited excellent excitation-dependent maximum fluorescence at 500/580 nm. Both hydrophilic and hydrophobic N-CDs exhibited favorable dispersion stability in polar and apolar mediums respectively and were used for the first time as friction-reducing and antiwear nanoadditives in selected PEG and PAO synthetic base oils for steel/steel contact, which offered great potential in lubricant field as demonstrated for the highly efficient carbon dots nano-additives in reducing both undesirable friction and wear. (C) 2018 Elsevier B.V. All rights reserved.
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