Epoxy Tung Oil Ethyl Ester as Bio-Lubricant Base Stock

• Main Author: Novia Nur Fitriana Sari
• Other Authors: Yi-Hsu Ju
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/2yw2vd

碩士 === 國立臺灣科技大學 === 化學工程系 === 106 === Epoxy tung oil ethyl ester (ETOEE) was produced by using tung oil ethyl ester (TOEE) and reacted with formic acid (FA) and hydrogen peroxide that was employed without catalyst. This study used two steps: transesterification with ethanol and KOH as catalyst followed by epoxidation. The transesterification was carried out at a molar ratio of tung oil to ethanol of 1:20, 60oC for 2 h. The highest conversion and yield are 93.6% and 87.2%, respectively which were obtained by using 5.86 g of formic acid, 14.5 g of hydrogen peroxide and 10 g of TOEE with reaction maintained at 50oC for 3 h. The objective of the research was to enhance the thermal-oxidative stability, kinematic viscosity, and analyze viscosity index of tung oil. Thermal-oxidative stability results were confirmed by using thermo gravimetric analysis (TGA) method under nitrogen and oxygen atmosphere. The presence of epoxy group and double bonds removal were clarified by using Fourier-transform infrared spectroscopy (FTIR). The kinematic viscosity was confirmed by using modular compact rheometer (MCR).