Preparation of Epoxidized Fatty Acid Ethyl Ester from Tung Oil as a Bio-lubricant Base-Stock

Ju, Yi-Hsu, Sari, Novia Nur Fitriana, Go, Alchris Woo, Wang, Meng-Jiy and Ayucitra, Aning (2019) Preparation of Epoxidized Fatty Acid Ethyl Ester from Tung Oil as a Bio-lubricant Base-Stock. Preparation of Epoxidized Fatty Acid Ethyl Ester from Tung Oil as a Bio-lubricant Base-Stock, 11 (8). pp. 4145-4155. ISSN e-ISSN: 1877-265X, p- ISSN: 1877-2641

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Official URL: https://www.springer.com/journal/12649/aims-and-sc...

Abstract

Preparation of epoxidized tung oil ethyl ester (ETOEE) was explored in this work via a two-step approach to produce biolubricant with enhanced thermal-oxidative stability. Transesterification of tung oil with ethanol was first carried out with KOH as the catalyst at 60 °C and a molar ratio of tung oil to ethanol of 1:20 for 2 h. The obtained tung oil ethyl ester (TOEE) was subjected to epoxidation in the presence of hydrogen peroxide and formic acid (FA). The highest conversion (93.6%, based on reduction of iodine value) was achieved by reacting 10 g of TOEE with 14.5 g of hydrogen peroxide and 5.86 g of FA at 50 °C for 3 h. Under these conditions, the resulting ETOEE has an oxirane number or epoxy value of 5.1%, and the presence of epoxy groups was confirmed by Fourier transform infrared spectroscopic analysis. The resulting ETOEE was further analyzed of its thermal stability under both oxidative and non-oxidative atmospheres. The viscosity index was determined and improvements in both thermal stability and lubricity were observed with the aid of a modular compact rheometer and a thermos-gravimetric analyzer, respectively. The ETOEE produced may be suitable for use as lubricating oil in gear boxes and engines.

Item Type:	Article
Uncontrolled Keywords:	Bio-lubricant · Catalyst-free · Epoxidation · Tung oil · Thermal stability · Viscosity
Subjects:	Engineering > Chemical Engineering
Divisions:	Journal Publication
Depositing User:	F.X. Hadi
Date Deposited:	24 Nov 2023 01:40
Last Modified:	24 Jan 2024 02:51
URI:	http://repository.ukwms.ac.id/id/eprint/37419

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