Fabrication of Ionic Supramolecular Oleogel Lubricants Enhanced with Liquid Metal Nanodroplets for Superior Tribological Performance

Tiantian Wang, Yixin Wang, Xinnan Wang, Baoluo He, Shujuan Liu, Qian Ye, Feng Zhou, Weimin Liu

科研成果: 期刊稿件文章同行评审

3 引用 (Scopus)

摘要

Supramolecular Oleogel lubricants provide a versatile and reliable strategy for optimizing the long-term dispersion stability of nanoadditives in the base oils. In this work, GLM-based ionic gelators constructing supramolecular oleogels were prepared by adding ultrasonically treated gallium-based liquid metal (GLM) nanodroplets carrying free radicals and vinyl-containing ionic liquids (ILs) directly to a free radical polymerization system of polymer gelators. The electrostatic interactions between the ionic liquids and GLM nanodroplets enhanced the cross-linking degree of supramolecular gels and formed denser self-assembled structures. The as-prepared GLM-based ionic oleogels as thermoreversible gels exhibit exceptional thixotropic properties. Compared to the base oil PAO10, the coefficient of friction (COF) for both GLM@IGel-1 and GLM@IGel-2 decreased significantly from 0.192 to 0.097, while the wear volume dropped from 100.10 × 104 μm3 to 13.28 × 104 μm3 for GLM@IGel-1, and to 9.69 × 104 μm3 for GLM@IGel-2. In addition, GLM@IGel-2 demonstrates a higher load-bearing capacity of 550 N due to further chemical cross-linking by ionic liquids. The outstanding lubrication performance of GLM-based ionic oleogels is achieved by the synergy of GLM nanodroplets and gel lubricants, promoting the formation of a stable tribo-chemical reaction film.

源语言英语
页(从-至)33468-33478
页数11
期刊ACS Nano
18
49
DOI
出版状态已出版 - 10 12月 2024

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