One-step green synthesis of oil-dispersible carbonized polymer dots as eco-friendly lubricant additives with superior dispersibility, lubricity, and durability

被引：39
作者：
Mou, Zihao [1 ]
Yang, Qingbin [2 ]
Peng, Jie [2 ]
Yan, Ruixin [2 ]
Zhao, Bin [3 ]
Ge, Yicen [4 ]
Xiao, Dan [1 ,5 ]
机构：
[1] Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China
[2] Chengdu Univ, Sch Mech Engn, Chengdu 610106, Peoples R China
[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
[4] Chengdu Univ Technol, Coll Mat Chem Chem Engn, Chengdu 610059, Peoples R China
[5] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2022年 / 623卷
基金：
中国国家自然科学基金;
关键词：
Carbonized polymer dots; Green synthesis; Saccharides; Lubricant additives; Tribological properties; TRIBOLOGICAL PROPERTIES; FACILE SYNTHESIS; IONIC LIQUIDS; NANO-OIL; IN-SITU; FRICTION; NANOPARTICLES; PERFORMANCE; NANOTUBES; ANTIWEAR;
D O I：
10.1016/j.jcis.2022.05.095
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Chemical functionalization provides effective protocols for inorganic nanomaterials as oil-dispersible lubricant additives. Nevertheless, harsh reaction conditions and arduous post-processing are frequently encountered when adopting this approach. Herein, four types of carbonized polymer dots (CPDs) with admirable dispersibility and long-term stability (more than 6 months without any sediments) in polyethylene glycol (PEG200) were synthesized by a one-step and green solvothermal route using saccharides as the single precursors. The tribological behaviors of CPDs as the lubricant additives of PEG200 were systematically evaluated and compared, confirming that the anti-wear and friction-reducing performances of PEG200 can be effectively enhanced after blended with CPDs. Clarified by the friction evaluations and worn surface detections, the superior lubricity and durability of CPDs-c are mainly attributed to the synergy between the interfacial adsorption of polymeric shells, the nano-lubrication effects of carbon cores, and the establishment of CPDs-inserted tribofilm with a uniform thickness of about 86 nm. This work explores a green and facile strategy for synthesizing the CPDs toward oil lubrication and reveals the lubrication mechanism of CPDs, which facilitates the practical application of CPDs in tribology. (C) 2022 Elsevier Inc. All rights reserved.
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收藏
页码：762 / 774
页数：13
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