Recent advances in metal–organic frameworks for lubrication

Wang, Chenxia; Zhou, Mingan; Cao, Hao; Lin, Hualin; Han, Sheng

doi:10.1039/d3me00149k

Cited by 2 publications

(1 citation statement)

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“…Metal-organic frameworks (MOFs) are crystalline materials with a periodic network structure formed by the interconnection of inorganic metal centers (metal ions or metal clusters) and bridging organic ligands [ 13 ]. MOFs have been found to show many advantages, such as high porosity, tunable architecture, good thermal stability, high specific surface area, and so on, due to which they have been paid much attention in academic societies [ 14 ]. In addition to applications in the fields of adsorption and separation [ 15 ], catalysis [ 16 ], sensing [ 17 ], and energy storage and conversion [ 18 ], MOFs have also been verified to be effective in the area of tribology.…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Polyimide Composites Modified with Diamondoid Metal–Organic Frameworks

Yu,

Pei,

Pei

et al. 2024

Polymers

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In this work, diamondoid metal-organic frameworks (MOFs) were efficiently prepared by sonochemical synthesis and grown on polyimide (PI), aiming to improve the anti-wear performance of the PI matrix. By introducing MOFs into the PI matrix, the free movement of PI molecular chains were restricted, and its hardness and elastic modulus were improved. It was found that the wear rate of the 3 wt.% MOFs/PI composites was reduced by 72.6% compared to pure PI at a load of 4 N after tribological testing by using a ball-on-disk tribometer. This can be attributed to the excellent load-bearing and shear resistance of the fourfold-interpenetrated diamondoid networks, in which the transition metal elements can favor the formation of transfer films. It is worth noting that the 3 wt.% MOFs/PI composites still exhibited great tribological properties under high loads or high speeds. The findings of the present study indicate that diamondoid metal-organic frameworks can be used as efficient modifiers to enhance the tribological properties of PI.

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Section: Introductionmentioning

confidence: 99%

Tribological Properties of Polyimide Composites Modified with Diamondoid Metal–Organic Frameworks

Yu,

Pei,

Pei

et al. 2024

Polymers

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Assessing the reinforced molecular/mechanical behaviors of GOs@Mo-MOFs films deposited via electrophoresis onto microdevices: Experimental and theoretical perspectives

Cao,

Gong,

Xue

et al. 2024

The Journal of Chemical Physics

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One of the primary hurdles in microdevice fabrication lies in ascertaining the most impactful tactics for adapting metal surfaces. Through a one-pot tackle and distinct mechanochemical reactions evoked by 15 min aqueous wet sand-milling (SM-15), we successfully grafted Mo-based metal–organic frameworks (Mo-MOFs) onto graphene oxides (GOs). Following this, a convenient and readily scalable methodology of electrophoretic deposition was implemented to create controllable thickness of SM-15 GOs@Mo-MOFs lubricating films, achieving considerable enhancements of 143% and 91% in hardness and Young’s modulus, respectively, when compared to those of SM-15 Mo-MOFs. The successful synthesis of SM-15 GOs@Mo-MOFs was corroborated using strategies such as x-ray diffraction, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy. Analyses using the micro-tribotester indicated that the new film exhibited a lowest friction coefficient of roughly 0.5 when imposed with a load of 5 N and sliding speed of 8 mm/s. In addition, the optical profiler nano-indentation in situ scanning probe microscope revealed that SM-15 GOs@Mo-MOFs films had smaller and shallower scratches and grooves compared to SM-15 Mo-MOFs ones. The calculated results of key descriptors (EHOMO, ELUMO, ΔE, etc.) in density functional theory quantitatively disclosed the interaction mechanisms between GOs@Mo-MOFs molecules and microdevices. We first scrutinized the innate properties of molecule adsorption energy and frictional mechanical behaviors using synergetic cross-scale simulations, such as Monte Carlo and finite element methods. The expectation was that this process would motivate a valuable technique for shielding in the thriving micromanufacturing.

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Recent advances in metal–organic frameworks for lubrication

Abstract: In recent years, metal–organic frameworks (MOFs) have attracted much attention in lubrication due to their unique structures.

Cited by 2 publications

References 100 publications

Tribological Properties of Polyimide Composites Modified with Diamondoid Metal–Organic Frameworks

Tribological Properties of Polyimide Composites Modified with Diamondoid Metal–Organic Frameworks

Assessing the reinforced molecular/mechanical behaviors of GOs@Mo-MOFs films deposited via electrophoresis onto microdevices: Experimental and theoretical perspectives

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