Evaluation of a Novel Hindered Phenolic Triazine Schiff Base as Multifunctional Additive in Biolube and Biodiesel

摘要

A novel hindered phenolic triazine Schiff base TrBzEd was synthesized. At first the intermediate triazine Schiff base TrBz was synthesized by imine coupling of the 2-chloro-4,6-diamino-1,3,5-triazine with 3,5-di-tert-butyl-4-hydroxybenzaldehyde. In the second step, additive TrBzEd was synthesized by reacting TrBz with the ethylenediamine. After characterization by CHN, FT-IR, NMR and TG, TrBzEd was evaluated as antioxidant and lubricity improver additive in both the polyol (biolube reference fluid) and biodiesel (Jatropha curcas). The RBOT and Rancimat tests were done to evaluate the antioxidant performance in polyol and biodiesel respectively. Lubricity improving characteristics were evaluated by doing four-ball test with polyol blend and HFRR test with biodiesel blends with TrBzEd in different concentrations. It was found that the TrBzEd improves the oxidative stability of the polyol significantly as the RBOT time of the blank polyol was found to be increased from 6.72 +/- 0.15 to 12.57 +/- 0.09 min at 2000 ppm concentration. It also showed moderate antiwear and antifriction characteristics in it. Antioxidant performance of this additive in biodiesel too was found to be excellent as Rancimat induction period at 1500 ppm additive concentration was found to be 13.14 +/- 0.07 h which was high in comparison to the un-doped biodiesel by 2.19 times.