Surface Modified Benzoylated Okra (Abelmoschus esculentus) Bast Fiber Reinforced Polypropylene Composites
Keywords:Okra bast fiber, Polypropylene, Composite, Alkali-treatment, Mechanical properties
Nonwoven unidirectional Okra fiber (OF)-reinforced polypropylene (PP) based composites were manufactured by a hot press machine and their interfacial, physicomechanical features, thermal degradation, and weather test were examined. This paper reports the effect of OF content, alkaline treatment of fiber, as well as inclusion of benzoylation as coupling agent on the features of PP/OF composites, was studied. The outcomes indicated that the OFs performed as reinforcing fillers, developing the mechanical features (e.g., tensile strength, tensile modulus, impact strength, and hardness) of the composites. PP/OF composites with benzoylation after alkaline pretreatment exhibited better mechanical features than alkali treatment and untreated composites. The interfacial feature was examined by scanning electron microscopy (SEM) and it was found that the interfacial interaction between PP and OF was increased due to the treatment of the fibers, which validates the obtained mechanical features of the composite. Moisture absorption experiments have shown that benzoylation treatment of OF composites shows lower water absorption than both alkali-treated and untreated composites. Thermal degradation and weather tests of the composites were also investigated.
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This work is licensed under a Creative Commons Attribution 4.0 International License (CC-BY 4.0).