Pengaruh Komposisi Limbah Sekam Padi dan Abu Sekam Padi sebagai Bahan Pengisi Komposit Hibrid Limbah Botol Plastik Kemasan Minuman

Abstract

This study aims to reduce waste plastic bottles that are not biodegradabled and to determine the composition of rice husk ash and rice husk filler in hybrid composites LBPKM in order to obtain the best results of mechanical properties analysis, such as tensile strength (tensile strength), flexural strength (flexural strength), and strength bump (impact strength), also water absorption test (water absorption), Scanning Electron Microscopy (SEM) analysis, and Fourier Transform Infra-Red (FTIR) have been done. Hybrid composites made using extruder at 265 ° C by mixing waste plastic bottles with 100 mesh particle size rice husk ash and rice husk ash filler, where the ratio between matrix and filler are 95/5, 90/10 and 85/15 (% w/w in 100 grams) and then hotpressed at 265 ° C for 5 minutes. From the results of FT-IR analysis showed the presence of O-H functional groups at wave number 3429.43 cm-1 , C-H at 2893.22 and 794.67 cm-1 , C=O at 1720.50 cm-1 , and C-O-C at 1235.73 cm-1 . The results of mechanical properties analysis showed that the hybrid composite waste plastic bottles-rice husk ash-rice husk ratio 90/10 obtained maximum tensile strength of 2.711 MPa, Young's modulus of 219.331 MPa, elongation at break of 0.538%, bending strength of 0.954 MPa, and power bump of 1023.8 J/m2 . The results of SEM analysis on hybrid composite of waste plastic bottles-rice husk ash-rice husk ratio 90/10 showed the filler spread evenly on the surface of the matrix. The results of water absorption test showed that the hybrid composite of waste plastic bottles-rice husk ash-rice husk ratio 85/15 is the highest water absorption’s composites, that is equal to 3.4671%.