Journal
POLYMERS
Volume 14, Issue 20, Pages -Publisher
MDPI
DOI: 10.3390/polym14204348
Keywords
lignocellulosic materials; polymer matrix composites; licorice root; palm leaf; holm oak; willow; mechanical properties; thermal properties
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Funding
- Universita di Camerino under the LEAF project on the FAR (Fondi di Ateneo per la Ricerca) scheme
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The effect of four lignocellulosic waste fillers on the thermal and mechanical properties of biocomposites was investigated. The results showed that holm oak fillers provided the best combination of thermal and mechanical performance.
The effect of four lignocellulosic waste fillers on the thermal and mechanical properties of biocomposites was investigated. Powdered licorice root, palm leaf, holm oak and willow fillers were melt compounded with polypropylene at two different weight contents, i.e., 10 and 30, and then injection molded. A commercially available maleated coupling agent was used to improve the filler/matrix interfacial adhesion at 5 wt.%. Composites were subjected to chemical (FTIR-ATR), thermal (TGA, DSC, DMA) and mechanical (tensile, bending and Charpy impact) analyses coupled with a morphological investigation by scanning electron microscopy. Although similarities among the different formulations were noted, holm oak fillers provided the best combination of thermal and mechanical performance. In particular, at 30 wt.% content with coupling agent, this composite formulation displayed remarkable increases in tensile strength and modulus, flexural strength and modulus, of 28% and 110%, 58% and 111%, compared to neat PP, respectively. The results imply that all these lignocellulosic waste fillers can be used successfully as raw materials for biocomposites, with properties comparable to those featured by other natural fillers.
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