Synthesizing lignin-based gelators to prepare oleogels used as green and fossil-free greases

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: 305, P. 141074 - 141074

Published: Feb. 19, 2025

Traditional lubricating greases are mainly derived from petroleum, which poses major environmental challenges due to their non-biodegradability and pollution issues. This study attempts synthesize lignin-based green thickeners explore potential for developing fossil-free greases. A gelator was successfully synthesized by reacting malic acid with lignin epoxidized soybean oil, in participated both the esterification reaction ring-opening of epoxy group. used as thickener prepare several different oils, e.g., castor rapeseed PAO 15, paraffin oil. It found that combining this oil can be preparing greases, while it does not work other oils. Rheological studied showed 35 % gelator-castor grease exhibited strong gel-like behaviour, storage modulus (G', 400 Pa) exceeding loss (G", 40 shear-thinning viscosity reducing 106 104 mPa·s under stress. Comprehensive tribological studies on developed show gelators significantly improve lubricant performance (about 20 lower friction around wear a contact pressure 2.72 GPa, reciprocating speed 0.1 m/s, 80 °C). XPS analysis further revealed ability form protective film metal surfaces. demonstrates great provides new ideas high-performance, green,

Language: Английский

Exploring viscosity metrics for hydrogen-bond dominated liquid superlubricity using ionic liquid analogue models

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: 715, P. 136614 - 136614

Published: March 15, 2025

Language: Английский

Effect of choline chloride/multiple diols deep eutectic solvents on the friction and vibration performance of Si3N4/GCr15 hybrid ceramic ball bearings

Tribology International, Journal Year: 2024, Volume and Issue: 198, P. 109845 - 109845

Published: June 4, 2024

Language: Английский