Phosphonates from vegetable oils: Synthesis and tribological evaluation

Authors: Bantchev, Grigor; LORENZO-MARTIN, MARIA - Argonne National Laboratory; AJAYI, OYELAYO - Argonne National Laboratory

Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/3/2024
Publication Date: 8/18/2024
Citation: Bantchev, G.B., Lorenzo-Martin, M.D., Ajayi, O.O. 2024. Phosphonates from vegetable oils: Synthesis and tribological evaluation [abstract]. American Chemical Society Fall Elevating Chemistry Meeting & Expo, August 18-22, 2024, Denver, Colorado.

Interpretive Summary:

Technical Abstract: Biobased lubricants are expected to haw lower ecological impact. Unfortunately, despite some favorable properties, vegetable oils have drawbacks, most notably oxidative stability and cold-flow properties, that hamper their use as commercial high-quality lubricants. To overcome these drawbacks, chemical modifications of the vegetable oils are required. In this presentation, we discuss the hydrophosphonylation of vegetable oils for obtaining better performing biobased lubricants - reaction chemistry, analysis, and tribological properties of the new products will be presented. The synthesized phosphonates, especially from di-n-butyl phosphite, have better oxidative stability, good cold flow properties, low compressibility (high bulk modulus), and low traction. The phosphonates also showed good wear reduction in four-ball values when used as an additive. These properties indicate that phosphonates from vegetable oils have potential as commercial biobased lubricants, and especially as hydraulic fluids.