Influence of Fiber Treatment on the Mechanical and Morphological Properties of Sawdust Reinforced Polypropylene Composites |
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Authors: | Md Rezaur Rahman Md Nazrul Islam and Md Monimul Huque |
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Institution: | (1) Department of Chemistry, Bangladesh University of Engineering and Technology, Dhaka, 1000, Bangladesh; |
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Abstract: | In the present work, sawdust reinforced polypropylene composites were fabricated using an extruder and an injection molding
machine. Raw sawdust was chemically treated with benzene diazonium salt in order to improve the mechanical properties of the
composites. The effect of the chemically treated sawdust reinforced PP composites was evaluated from their mechanical and
surface morphological properties. The values of the mechanical properties of the chemically treated sawdust–PP composites
were found to be significantly higher than those of the raw ones. Water uptake tests revealed that composites prepared from
the chemically treated sawdust absorb lower amount of water compared to the ones prepared from raw sawdust, suggesting that
hydrophilic nature of the cellulose in the sawdust has significantly decreased upon chemical treatment. The surface morphology
obtained from scanning electron microscopy (SEM) showed that raw sawdust–PP composites possess surface roughness with extruded
filler moieties, and weak interfacial adhesion between the matrix and the filler while the chemically treated one showed improved
filler–matrix interaction. This indicates that better dispersion of the filler with the PP matrix has occurred upon chemical
treatment of the filler. |
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Keywords: | |
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