Study of physical and tribology properties of soybean oil-based grease formulated with polysoap

Authors: Liu, Zengshe - Kevin; Biresaw, Girma; Biswas, Atanu; Cheng, Huai

Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: 5/6/2018
Publication Date: 5/6/2018
Citation: Liu, Z., Biresaw, G., Biswas, A., Cheng, H.N. 2018. Study of physical and tribology properties of soybean oil-based grease formulated with polysoap [abstract]. American Oil Chemists' Society Annual Meeting & Expo. p. 70.

Interpretive Summary:

Technical Abstract: Soybean oil-based grease formulated with polysoaps, which was synthesized from polymeric epoxdized soybean oil, was investigated. Greases were prepared using a mixture of lithium soap and triethanolammonium polysoap. Grease properties investigated were: hardness, using cone penetration procedure (ASTM D217); oxidation stability, using the pressurized differential scanning calorimetry (PDSC) method (ASTM D-5483); friction and wear, using 4-ball tribometer (ASTM D-2266).Penetration data showed that grease formulated in the presence of polysoap was harder than that without polysoap, and this was attributed to the cross-linking in the polysoap structure which was expected to provide higher resistance to deformation. PDSC results indicated that the onset temperature of grease formulated with 3.8 wt% and 7.3 wt% polysoap increased by 8°C and 12°C, respectively, compared to grease without polysoap. The coefficient of friction of grease formulated with polysoap was much lower (0.015) than grease without polysoap (0.034).