Supramolecular gelator functionalized liquid metal nanodroplets as lubricant additive for friction reduction and anti-wear

Silica-Coated N-Doped Porous Carbon Nanospheres as Antiwear and Friction-Reduction Lubricant Additives

“…As displayed in Figure a–e, the trait peaks of C 1s at 284.8, 286.1, and 288.5 eV are attributed to C–C/CC, C–O/C–N, and CO, respectively. The trait peaks of Fe 2p at 713.3, 710.7, and 707.1 eV can be ascribed to Fe (OH)O, iron oxide, and Fe, corresponding to the O 1s peak of 532.9, 531.9, and 530.4 eV, respectively. , The Si 2p and N 1s peaks appearing at 101.9 and 400.1 eV are attributed to the presence of silicates and carbonitride, respectively. Furthermore, the presence of a carbon protective film was confirmed by the appearance of D and G characteristic peaks at 1341 and 1580 cm –1 , respectively, in Raman spectra on the worn surface (Figure f).…”

Fabrication of Zwitterionic Polymer-Functionalized Onion-like Carbon Nanoparticles as Aqueous Lubricant Additives

“…According to statistics in the world, about one-third of the energy is consumed in various forms of friction, and about 80% of machine parts fail because of wear. − The utilization of lubricants is an effective measure that can effectively reduce friction and wear as well as the consumption of energy resources. At present, the most simple and effective lubricants used in industry are mainly liquid lubricants. , Compared to oil-based lubricants, water-based lubricants have been widely researched and applied in bearing, hydraulic transmission, biomedical, and other areas due to their advantages of being nontoxic, environmental friendliness, low cost, wide range of sources, being noncombustible, and good cooling properties. − However, the shortcomings of low viscosity, poor load-bearing capacity, and strong corrosiveness of water largely limit the development of aqueous lubrication . So as to enhance the water lubrication capability, adding water-soluble additives is an indispensable method.…”

“…At present, the most simple and effective lubricants used in industry are mainly liquid lubricants. 4,5 Compared to oil-based lubricants, water-based lubricants have been widely researched and applied in bearing, 6 hydraulic transmission, 7 biomedical, 8 and other areas due to their advantages of being nontoxic, environmental friendliness, low cost, wide range of sources, being noncombustible, and good cooling properties. 9−11 However, the shortcomings of low viscosity, poor load-bearing capacity, and strong corrosiveness of water largely limit the development of aqueous lubrication.…”

Size-Regulated Metal–Organic Frameworks with Mercaptobenzothiazole for Ga-Based Liquid Metal Encapsulation: A High Performance Oil-Based Additive

“…21 Gallium-based liquid metal (GLM) nanoparticles have gained attention as promising lubricant additives due to their excellent antiload capacity, effective antifriction performance, and stable chemical properties. 22,23 However, GLM nanoparticles are prone to be oxidized and agglomerate, which limit their tribological properties and applications. 24 To address this problem, recent researches have demonstrated that metallic nanomaterials can be encapsulated in controllably engineered MOFs to prepare composites with multifunctions.…”

“…In many circumstances, the synergistic effect achieved by combining different types of nanomaterials can greatly enhance lubricating performance . Gallium-based liquid metal (GLM) nanoparticles have gained attention as promising lubricant additives due to their excellent antiload capacity, effective antifriction performance, and stable chemical properties. , However, GLM nanoparticles are prone to be oxidized and agglomerate, which limit their tribological properties and applications . To address this problem, recent researches have demonstrated that metallic nanomaterials can be encapsulated in controllably engineered MOFs to prepare composites with multifunctions. , The composites exhibited multiple purposes, including preventing particle aggregation, imparting reactant selectivity, and controlling the release of payloads. , Therefore, the multifunctional composite nanomaterials, GLM nanomaterials encapsulated by flexible MOFs framework, are expected to meet diverse lubrication requirements and significantly enhance the performance of lubricant.…”