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By: Haydar U. Zaman.
Assist. Prof., Department of Physics, National University of Bangladesh and Institute of Radiation and Polymer Technology, Bangladesh Atomic Energy Commission, P.O. Box-3787, Savar, Dhaka, Bangladesh
The current era’s remedies to global warming revolve around replacing fossil fuels with more ecologically friendly biodegradable materials in order to slow down the rate at which they are being depleted. Calotropis gigantea fruit bunch (CGFB) fiber is one kind of substitute material that this work envisage using in place of plastics in the construction of composite materials, as supported by the study literature. CGFB fiber was chosen for this project because it is extensively accessible in Bangladesh and has less value to vegetation. The CGFB fiber undergoes three different chemical pretreatments: sodium hydroxide (alkali treatment), hydrogen peroxide (peroxide treatment) and benzoyl chloride (benzoylation). Composites are made from chemically treated fibers, and the mechanical characteristics of these materials are investigated. Benzoylated composite offers better tensile, compressive, and impact strengths than any other composite. Compared to the untreated and benzoylated versions, it has been demonstrated that the benzoylation increased the composites’ tensile strength by 98.3%, compressive strength by 61.4%, and impact strength by 97.7%. Compared to other composites, the one treated with hydrogen peroxide had the highest flexural strength. Following a hydrogen peroxide treatment, the flexural strength rose by 44.5%. Despite having a little lower flexural strength than the benzoylated composite, the composite’s elongation capacity was enhanced throughout tension, flexure, and compression tests after being treated with hydrogen peroxide. When considering overall performance, benzoyl chloride seems to be the most efficient chemical treatment. There were not many flaws visible in the benzoylated composite’s surface morphology.
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