Fabrication of Garlic Oil-Functionalized Onion-Like Carbon Nanoparticles as Effective Nanoadditives for Improved Lubricating Performance
Source abstract
Abstract
Herein, garlic oil-functionalized onion-like carbon (OLC) nanoparticles were successfully prepared through a multistep process involving the carbonization of candle ash followed by surface modification. Initially, the OLC was prepared by heat-treating candle ash under 450 °C and then grafting polyethylenimine (PEI) using epigallocatechin gallate (EGCG) as a cross-linking agent. Subsequently, garlic oil was grafted onto PEI@OLC via the aza-Michael reaction with PEI, thereby obtaining garlic oil-functionalized OLC nanoparticles (GO@OLC). The GO@OLC exhibited enhanced lubrication properties as a lube additive, with a low coefficient of friction (COF) of 0.11 and a significant reduction of 76.57% in wear volume. The enhanced lubrication performance is credited to the rolling effect and surface repairing effect of the OLC nanoparticles as well as the formation of a complex protective layer by GO@OLC-induced tribochemical reactions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Lubricants and Their Additives · Molecular Junctions and Nanostructures · Dendrimers and Hyperbranched Polymers
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, P. R. China
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
Funding
State Key Laboratory of Solidification Processing · National Natural Science Foundation of China · Chinese Academy of Sciences · Shaanxi Provincial Science and Technology Innovation Team
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