Reinforcement of Polylactic acid (PLA) biocomposite with lignin from oil palm empty fruit bunches (OPEFB) for 3D printing application
Polylactic acid (PLA) has been used as an additive material in 3D printing due to its toxic-free and environmentally friendly property. Lignin with complex and branched chemical structures had been used as a filler to improve the mechanical strength of PLA. The availability of oil palm empty frui...
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| Main Authors: | , , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
IOP Publishing Ltd
2021
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/95114/1/95114_Reinforcement%20of%20Polylactic%20acid%20%28PLA%29%20biocomposite.pdf http://irep.iium.edu.my/95114/ https://iopscience.iop.org/journal/1757-899X |
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| Summary: | Polylactic acid (PLA) has been used as an additive material in 3D printing due to its
toxic-free and environmentally friendly property. Lignin with complex and branched chemical
structures had been used as a filler to improve the mechanical strength of PLA. The availability
of oil palm empty fruit bunches (OPEFB) in Malaysia had made this material a good source for
lignin extraction. Thus, in this research, we aim to study the mechanical strength of PLA biocomposite material with reinforcement of lignin from OPEFB. The lignin was extracted by 1,4-
dioxane with hydrochloric acid as a catalyst. The recovery of lignin from extraction solvent was
done by precipitation. The lignin was successfully extracted from OPEFB with 9.04% of lignin
extraction yield. The PLA/lignin bio-composite filament with 0.1% (w/w) lignin was performed
by filament extruder and then used for 3D printing. The prepared sample in the form of filament
and 3D printed material was characterized for mechanical strength and surface morphology. The
Young’s modulus, ultimate strength and elongation at break of the PLA/lignin bio-composite
sample had increased 11%, 7% and 10% respectively. After the filament was used for 3D
printing, the reduction of mechanical strength had been observed. The morphology by scanning
electron microscopy (SEM) confirmed the presence of lignin on the fracture surface of PLA biocomposite material. Apart from that, the interlayer adhesion had been observed in the 3D printed
PLA/lignin bio-composite that caused the drop in mechanical strength of the material. |
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