Characterisation of Hybrid Durian/Luffa and Ground Coffee Waste/Luffa High Density Polyethylene Polymer Composite

• Main Author: Mohd Khairul Afiq, Mazlan Ung
• Format: Thesis
• Language: English; English
• Published: University Malaysia Sarawak (UNIMAS) 2025
• Subjects: TJ Mechanical engineering and machinery; TN Mining engineering. Metallurgy
• Online Access: http://ir.unimas.my/id/eprint/49075/

This research explores the development of advanced materials known as natural fibre reinforced polymer (FRP) composites with the aim of enhancing overall quality of life. Hybrid fibres derived from durian/luffa and Ground Coffee Waste (GCW)/luffa were integrated into Polyethylene (PE) matrices to create hybrid natural fibre PE composites. The study involves a comprehensive examination of these composites through tensile testing, water absorption analysis, scanning electron microscopy (SEM), and Fourier-Transform Infrared (FTIR) analysis. Results indicate that the tensile strength of the durian/luffa PE (DLPE) composite surpasses that of GCW/luffa PE (CLPE) composites, highlighting its superior stress tolerance. Tensile modulus analysis reveals that CLPE exhibits greater elasticity than DLPE. Overall, the composites exhibit specific tensile strength and modulus, contributing to the creation of lightweight materials compared to neat PE. Water absorption testing reveals varied absorption rates, with DLPE samples absorbing more water than CLPE. SEM analysis indicates satisfactory fibre-to-matrix bonding with room for improvement, as observed gaps between fibres and matrix are present. FTIR analysis uncovers additional constituents in the chemical composition of GCW microfibres compared to durian luffa fibres. The inclusion of natural fibres as an alternative to synthetic counterparts aligns with Sustainable Development Goals (SDG) standards. This research underscores the feasibility and benefits of fibre hybridization, emphasizing improved mechanical strength, environmental sustainability, and cost efficiency.