A fundamental study of oil release mechanism in soap and non-soap thickened greases

作者：Saatchi Alireza^*; Shiller Paul J; Eghtesadi Seyed Ali; Liu Tianbo; Doll Gary L

来源：Tribology International, 2017, 110: 333-340.

DOI：10.1016/j.triboint.2017.02.004

• Grease
• Base oil
• Rheology
• Molecular simulation

The oil bleed behavior of lithium complex, calcium sulfonate and polyurea thickened greases have been studied. Results were interpreted within a model where the grease thickener is treated as particles suspended in a matrix of oil. There is a region surrounding the thickener particles, called the effective media, which is assumed to have completely immobilized the oil. Bleed is assumed to occur from the viscous flow of the unbound oil in a porous structure made of the effective media. Dynamic/Static light scattering (DLS/SLS) techniques were used to assess the geometry of the thickener particles. In the light of this model different bleed behaviors of the greases were explained, relating them to the geometry of the thickener particles.

• 出版日期2017-6