Development and characterization of polymeric matrix composite materials reinforced with lignocellulosic wastes

BOUDJEMLINE, Abdelkader (2025) Development and characterization of polymeric matrix composite materials reinforced with lignocellulosic wastes. Doctoral thesis, Université Mohamed Khider Biskra.

Text These Boudjemline Abdelkader 2025.pdf Download (6MB)

Abstract

This research investigates the potential of using date palm leaflet powder (DPLP) as a sustainable reinforcement for polyvinyl chloride (PVC)-based composites. Aiming to reduce environmental impact and promote bio-based alternatives, DPLP was subjected to various chemical treatments, including alkaline (NaOH), acetic acid, and silane coupling agent modifications, to enhance interfacial compatibility with the PVC matrix. The untreated (ULP), alkali-treated (ATLP), alkali–acetic acid treated (ACLP), and silane-treated (STLP) fillers were thoroughly characterized and incorporated at varying concentrations into the PVC matrix. Fourier-transform infrared spectroscopy (FTIR) confirmed the chemical alterations on the fibre surfaces, especially the successful grafting of silane groups, which improved chemical bonding potential. Mechanical testing revealed that chemical treatments significantly enhanced the composite properties. The STLP-based composites exhibited the highest Young’s modulus (221.08 MPa at 25% filler), tensile strength (10.6 MPa at 5% filler), and bending modulus, indicating improved fibre dispersion and interfacial adhesion. ATLP and ACLP composites also showed notable improvements, though slightly lower than STLP. In contrast, untreated composites demonstrated inferior mechanical behavior due to poor fibre–matrix bonding and high moisture absorption. The findings confirm the effectiveness of surface modification in optimizing DPLP as a reinforcing agent in PVC composites. The silane-treated fibres, in particular, yielded the most balanced performance across mechanical and structural metrics. This study lays the groundwork for further exploration of DPLP-based composites in sustainable engineering applications, offering an eco-friendly alternative for materials used in construction, packaging, and automotive sectors.

Actions (login required)

View Item