| Autor: |
Gabrielli S; Chemistry Division, School of Science and Technology, Università degli Studi di Camerino, ChIP Building, Via Madonna delle Carceri, 62032 Camerino, Italy., Caviglia M; Chemistry Division, School of Science and Technology, Università degli Studi di Camerino, ChIP Building, Via Madonna delle Carceri, 62032 Camerino, Italy., Pastore G; Chemistry Division, School of Science and Technology, Università degli Studi di Camerino, ChIP Building, Via Madonna delle Carceri, 62032 Camerino, Italy., Marcantoni E; Chemistry Division, School of Science and Technology, Università degli Studi di Camerino, ChIP Building, Via Madonna delle Carceri, 62032 Camerino, Italy., Nobili F; Chemistry Division, School of Science and Technology, Università degli Studi di Camerino, ChIP Building, Via Madonna delle Carceri, 62032 Camerino, Italy., Bottoni L; Chemistry Division, School of Science and Technology, Università degli Studi di Camerino, ChIP Building, Via Madonna delle Carceri, 62032 Camerino, Italy., Catorci A; School of Biosciences and Veterinary Medicine, Università degli Studi di Camerino, Via Gentile III da Varano, 62032 Camerino, Italy., Bavasso I; Department of Chemical Engineering Materials Environment, Sapienza-Università di Roma, Via Eudossiana 18, 00184 Roma, Italy., Sarasini F; Department of Chemical Engineering Materials Environment, Sapienza-Università di Roma, Via Eudossiana 18, 00184 Roma, Italy., Tirillò J; Department of Chemical Engineering Materials Environment, Sapienza-Università di Roma, Via Eudossiana 18, 00184 Roma, Italy., Santulli C; Geology Section, School of Science and Technology, Università degli Studi di Camerino, Via Gentile III da Varano 7, 62032 Camerino, Italy. |
| Abstrakt: |
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. |
