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RISS 인기검색어
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- 저자 : Januar Parlaungan Siregar (검색결과 3 건)
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Januar Parlaungan Siregar,Jamiluddin Jaafar,Tezara Cionita,Choo Chee Jie,Dandi Bachtiar,Mohd. Ruzaimi Mat Rejab,Yuli Panca Asmara 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.1
The study of natural fiber composite in the field of materials has indeed sparked interest among many due to its essential biodegradability feature. As such, pineapple leaf fiber (PALF) is not only biodegradable, but also environmental friendly, as opposed to synthetic fiber. Hence, this paper investigates the effect of fiber loading, as well as the inclusion of maleic anhydride polyethylene (MAPE) to the mechanical properties of PALF reinforced polylactic acid composites. Therefore, untreated PALF with 0, 5, 10, and 15% of weight content ratio, as well as PALF at 10% weight ratio treated with 2, 4, and 6% of MAPE, had been prepared via roll mill mixing at 190 °C and followed by hot compression molding to prepare the specimen sheets. The results obtained from this study revealed that the tensile strength (TS) and the Young’s modulus were at their highest levels for untreated 10% PALF, while the impact and the flexure properties displayed a decrease as the content of fiber increased. Other than that, the inclusion of MAPE indicated that the tensile properties exhibited lower value compared to that of untreated. However, the flexural and the impact properties of composites increased with the presence of MAPE. As a conclusion, the study demonstrates that the mechanical properties depended on two major factors; (1) fiber loading, and (2) the compatibility between matrix polymer and fiber.
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Important Considerations in Manufacturing of Natural Fiber Composites: A Review
Jamiluddin Jaafar,Januar Parlaungan Siregar,Salwani Mohd Salleh,Mohd Hazim Mohd Hamdan,Tezara Cionita,Teuku Rihayat 한국정밀공학회 2019 International Journal of Precision Engineering and Vol.6 No.3
The paper overviews the essential considerations in the manufacturing process of natural fiber composites which influence the performance of biocomposites. The evaluation of thermal properties of composites matrix and natural fiber chemical composition and physical properties appears to be necessary as the initial screening factors before the manufacturing process of biocomposites. On the other hand, considerations on fiber composition, type of manufacturing process and parameter used are seen as other crucial significant factors that need to be focused during the manufacturing of biocomposites. Moreover, the treatment used in the manufacturing process such as alkali treatment and coupling agent utilization should also be highlighted as additional important measures for better performance of biocomposites. In this review, all significant factors that influence the performance outcome of natural fiber composites are highlighted to provide the base-line source of literature for the manufacturing and production of composites sample. It is expected that the findings from the present study could further enhance the performance of natural fiber composites and able to become the preferred alternative or replacement for petroleum-based polymer in various industrial and commercial applications in the future.
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C. Tezara,M. Zalinawati,Januar Parlaungan Siregar,J. Jaafar,M. H. M. Hamdan,A. N. Oumer,K. H. Chuah 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.9 No.1
Natural fibres have been widely used in advanced applications, especially in the automotive industry. These fibres are inexpensive, non-abrasive, environmentally friendly, biodegradable, and possess low density with good mechanical properties. The main issue in using natural fibres is their incompatibility with a polymer matrix that lowers the mechanical properties. Therefore, this research analyses the effect of stacking sequences, fibre orientations, and alkali treatment on the mechanical properties of hybrid jute (J) and ramie (R) reinforced vinyl ester (VE) composites. Initially, woven fibres were fabricated based on the 3 and 4—layer stacking sequence with 0° orientation. The characterisation was done to analyse its properties. It was found that the RJJR stacking sequence possessed a tensile strength higher value of 28.90 MPa. The results for the RJJR sequence were fabricated with various fibre orientations such as 0°, 30°, 45°, and 90° to understand the effect of fibre orientation towards the tensile and flexural properties. The tensile and flexural strength with 0° fibre orientation is significantly higher than the other orientations with values of 28.90 MPa and 66.81 MPa, respectively. Besides, alkali treatment with 5 wt.% and 10 wt.% was used to enhance the mechanical properties, where 0° RJJR with 5 wt.% indicated maximum flexural strength with 34.50% increment compared to untreated RJJR. In conclusion, the combination of fibre orientation and lower alkali treatment concentration (5 wt.%) is highly beneficial in improving fibre hybrid composites’ mechanical properties.
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