Norman, Mohd Khairul Efni (2023) A study on tensile behavior of modified banana pseudo-stem (BPS) fiber/epoxy composite with selected alkaline treatment using response surface methodology (RSM). Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Natural fiber (NF) including banana pseudo-stem (BPS) was utilized as a reinforcing material and alternative substitution for synthetic fiber attributable to its abundance, inexpensive, lightweight and environmentally friendly. In this regard, the green material based on NF offers an excellent opportunity for composite development in sustaining renewable materials in many industries. Therefore, this current work aimed to evaluate the banana fiber reinforced epoxy composite influenced by novel alkaline treatment. Subsequently, the composite banana fiber (CBF) specimens were subjected to tensile load and corresponded stress-strain results according to ASTM D638 standard. Morphology analysis of these fibers was observed using a scanning electron microscope (SEM) and compared with untreated fiber. The finding showed that the treated banana fiber at moderate-level conditions (6% NaOH, 15 hours and 27ºC) was found to be provided higher mechanical properties and significantly offered optimum performance. From Analysis of Variance (ANOVA), only immersion time by immersion temperature interaction was less than 0.05 (p-value) and it significantly affected the tensile properties of CBFs. The range of R2, predicted R2 and adjusted R2 was 70.88 to 94.69% (tensile strength), 52.30 to 90.79% (Young’s modulus) and 79.90 to 95.66% (failure strain), respectively. In conclusion, the results confirmed that the optimum treatment setting was found to be at 6.5% NaOH, 17 hours and 27ºC of level conditions. This optimum result was predicted using response surface methodology (RSM) with 0.88 desirability. The average percentage error was found to be at 2.59% for tensile strength, 7.11% for Young’s modulus and 6.07% for failure strain, respectively. A lower percentage of error showed a more significant effect of each factor on the corresponding response, which was acceptable. These have made them more competitive than unmodified fiber applications, especially for the automotive industry as a cover for door panels, seat backs and armrest consoles

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