Molecular Geometry Governs Interlayer Orientation: Confined Carbonization of Deep Eutectic Solvent‐Intercalated Hydrotalcite for Universal Lubrication via Hybrid Tribofilm
Experimental study demonstrates hybrid tribofilm formation by deep eutectic solvent-intercalated hydrotalcites, indicating a versatile design strategy for universal lubricant additives.
Key Points
Design and evaluate deep eutectic solvent-intercalated layered double hydroxide composites as universal, high-efficiency lubricant additives.
Synthesized green deep eutectic solvents using tartaric acid, malic acid, and L-carnitine, and inserted them into layered double hydroxide (LDH) galleries.
Characterized structural exfoliation, interlayer spacing, and confined in situ carbonization behavior during frictional shear.
Evaluated tribological properties, load-bearing capacities, and anti-wear performance across diverse base fluids including water, polyethylene glycol, ester oil, and liquid paraffin.
TADES-LDH composites decreased wear by over 90% and sustained load-bearing capacities up to 500 N.
Confined gallery spaces facilitated in situ carbonization of guest molecules alongside LDH transformation into inorganic nanocrystals (ZnO, ZnAl2O4), producing a protective hybrid tribofilm.
Demonstrated broad compatibility and effective lubrication across all tested base fluids, including polar and nonpolar media.