Figure Captions
Fig. 1 Chemical structures of synthesized ionic liquids
Fig. 2 FT-IR spectra of synthesized ionic liquids
Fig. 3 Differential scanning calorimetric thermo grams of (a) CTB-RA and (b) BHI-RA
Fig. 4 TGA curves of ionic liquids under nitrogen atmosphere
Fig. 5 Variation of wear scar diameter with different concentrations of additives in base oil (a) EKE and (b) DOS
Fig. 6 Variation of wear scar diameter with different loads of additives in base oil (a) EKE and (b) DOS
Fig. 7 Variation of wear scar diameter with different rotation speed (rpm) of additives in base oil (a) EKE and (b) DOS
Fig. 8 Weld points at different concentration of additives in base oil EKE and DOS
Fig. 9 SEM images of the worn surface lubricated with (a) EKE and (b) EKE containing 0.8% of BHI-RA
Fig. 10 SEM images of the worn surface lubricated with (a) DOS and (b) DOS containing 0.8% of BHI-RA
Fig. 11 EDS analysis of the worn surfaces lubricated with (a) EKE, (b) DOS, (c) EKE containing 0.8% of BHI-RA and (d) DOS containing 0.8% of BHI-RA