Title : Impact of nanoparticles on the mechanical properties of natural fiber biocomposites
Abstract:
Biocomposites represent a constantly growing area of research, due to their great versatility of application and possible valid sustainable alternative to traditional composites. Although natural fiber- reinforced composites have promising mechanical and physical characteristics, they have some limitations related to moisture absorption and a weak level of adhesion of the fibers with polymer matrices. These problems lead to ineffective stress transfer at the fiber-matrix interface of the produced composites. However, the incorporation of nanomaterials can help solve these problems. The high surface area of the nanofillers is able to perform the dual function of toughening the matrix and promoting the bond strength at the fibre-matrix interface, resulting in an overall improvement in the mechanical properties of the material. Composites reinforced with natural fibers and nanoparticles are also more environmentally friendly, with lower water absorption and greater resistance to wear. Furthermore, the incorporation of specific nanomaterials into natural fiber polymer composites can provide additional benefits such as bacteria resistance, anti-odor properties, UV protection and hydrophobic properties.
As part of this work, experimental tests were carried out to determine the effect of different types of nanoparticles on the mechanical properties of natural fiber biocomposites. Specifically, by varying the volume fraction of the nanoparticles, characteristics such as the stiffness, strength, and elongation at break of the biocomposite were determined. For the different materials made, the shear resistance of the interface between the natural fibers and the epoxy matrix was compared using pull-out tests. The results obtained therefore allowed a pre-selection of the best constituent materials for future studies in the field of biocomposites reinforced with nanoparticles.
Funding: MUR, PNRR-M4C2, ECS_00000022
Acknowledgement: Progetto: "SiciliAn MicronanOTecH Research And Innovation CEnter "SAMOTHRACE" (MUR, PNRR-M4C2, ECS_00000022), spoke 3 - Università degli Studi di Palermo "S2-COMMs - Micro and Nanotechnologies for Smart & Sustainable Communities"
