Effect of Hemp Fibre Surface Treatment on the Fibre-Matrix Interface and the Influence of Cellulose, Hemicellulose, and Lignin Contents on Composite Strength Properties

Natural fibres have recently become an attractive alternative to synthetic in the implementation of polymer composite structures. Inherent flaws within natural terms their constituent contents (hemicellulose, cellulose, and lignin) reduce compatibility these with matrices. In this study, effects chemical treatments on hemp resulted polyester matrix are investigated. The were treated alkali (0–10% NaOH), acetyl, silane chemicals. Long unidirectional fibre composites prepared by vacuum-assisted resin transfer moulding (VARTM) process. Thermal properties tested using differential scanning calorimetry (DSC) analyses. mechanical samples compression bending tests. Failure analysis was undertaken through Optical Microscope (OM) Scanning Electron (SEM). results showed that 4% NaOH reduced interfacial bonding strength decreased compared untreated samples. At higher concentrations (6–10% increased as a result greater bonding. Different trends observed case alkalised further acetyl treatments. It effectively improved agreement micrographs.