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- Title
DEVELOPMENT OF BIODEGRADABLE HIGH DENSITY POLYETHYLENE COMPOSITE FOR STRUCTURAL APPLICATION.
- Authors
EFAOLA, A.; OLADELE, I. O.; ADEWUYI, B. O.; OYETUNJI, A.
- Abstract
This study investigates high density polyethylene composites reinforced with yam stem particulate. Yam stem was obtained from the stem of harvested white yam tuber (Dioscoreaspp) and was treated with NaOH. Both treated and untreated yam stem fibres were pulverized to obtained particle sizes of .150 µm. The constituents were analyzed by gravimetric method whileThermogravimetric Analyzer (TGA) and X-ray Diffractograms (XRD) were used for characterization. The processed particles were used for the development of the high density polyethylene composites. The result showed that chemical treatment of fibre with NaOH enhances the removal of lignin and hemicellulose and, the retention of cellulose essential for reinforcement. TGA analysis revealed that the treated yam stem particulate were more thermally stable in comparison with the untreated while XRD analysis showed that alkaline treated peaks were more intense than the untreated due to the chemical treatment which was able to remove the unwanted fibre constituents from the fibre surface thus, exposing the cellulose which are highly crystalline. SEM analysis indicate improved adhesion in the morphology of the composites produced as there was no evidence of large agglomerate, delamination between the particles and the polymer matrix and pull out of the particles from the matrix. Results obtained from the mechanical tests showed that the mechanical properties of high density polyethylene composites developed improved better than the unreinforced composites while the treated performed better than the untreated composites. Optimum mechanical properties were achieved at 2 wt% particulate reinforcement of the HDPE; it therefore shows that good mechanical properties can be achieved by incorporating small amount of fillers into the matrix.
- Publication
Acta Technica Corviniensis - Bulletin of Engineering, 2019, Vol 12, Issue 2, p37
- ISSN
2067-3809
- Publication type
Academic Journal