Synthesis and evaluation of amines/phenolics antioxidant for TMPTO base oil
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 28 August 2019
Issue publication date: 14 January 2020
Abstract
Purpose
The purpose of this paper is to synthesize amines/phenolic antioxidants by a new method and to characterize the influence of antioxidants on thermo-oxidative degradation in trimethylolpropane trioleate (TMPTO) base oil.
Design/methodology/approach
The molecule structures of antioxidants and lubricants were confirmed using Fourier transform infrared spectroscopy (FTIR). The oxidative stability of antioxidants and lubricants was evaluated by pressurized differential scanning calorimetry (PDSC).
Findings
These findings suggested that butyl-octyl-diphenylamine has obvious advantage on kinematic viscosity inhibition, and amine-phenol combination antioxidant has a slightly better suppression of total acid in TMPTO under thermal oxidation at 200°C for 96 h. The FTIR characterizations showed that all antioxidants could protect the basic structure of TMPTO in the early stage of thermal degradation.
Originality/value
Under the action of butyl-octyl-diphenylamine, the dehydrogenation of TMPTO is easily met with the alkenyl hydrogen = C–H bond in the unsaturated C = C. Meanwhile, as octadecyl 3-(3, 5-di-tert-butyl-4-hydroxyphenyl)propionate protects TMPTO, the unsaturated C = C bond in the base oil molecule easily breaks down during transition.
Keywords
Citation
Zhan, W., Jia, D., Jin, Y., Duan, H., Li, J. and Liu, J. (2020), "Synthesis and evaluation of amines/phenolics antioxidant for TMPTO base oil", Industrial Lubrication and Tribology, Vol. 72 No. 1, pp. 46-53. https://doi.org/10.1108/ILT-02-2019-0053
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited