In this study, the ionic liquid as additive on recycle high density polyethylene/bamboo filler (rHDPE/BF) using different concentration (0.2 wt.%, 0.4 wt.% and 0.6 wt.%) of 1-ethyl-3-methylimidazolium thiocyanate (EMImSCN) and 1-methyl-3-octylimidazolium chloride (OMImCl) ionic liquid was performed. The bamboo filler were reinforced with in rHDPE matrix using extrusion method and undergo injection molding process for sample preparation. For comparison purpose, rHDPE/BF composites with both of ionic liquid were tested under flexural and charpy impact test respectively. Result indicate that the present of 0.4 wt.% with OMImCl of ionic liquid on rHDPE/BF composites with better matrix/filler interlocking characteristics shows better mechanical performance compared with EMImSCN ionic liquid on rHDPE/BF composites. The field emission scanning electron microscope (FESEM) was used to analyze the fractured surface on the impact test. The FESEM test revealed fractured surface of rHDPE/BF composites has better adhesion between the filler and matrix with the presence of additives as the gaps between filler and matrix was reduced.
