Sifat Tarik, Bending dan Impak Komposit Serat Sabut Kelapa-Polyester dengan Variasi Fraksi Volume

Gundara, Gugun; Rahman, Muhammad Budi Nur

doi:10.18196/jmpm.3132

Cited by 7 publications

(10 citation statements)

References 5 publications

(7 reference statements)

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“…Then the coco fiber was rinsed with distilled water and dried in an oven at a temperature of 100˚C for 30 minutes. Dry fiber has a density of 1.28 g/cm 3 . The matrix used is unsaturated polyester (UP) type 157 BQTN Yukalac resin with 1% Methyl Ethyl Peroxide (MEKPO) as a catalyst.…”

Section: Methodsmentioning

confidence: 99%

“…Fiber-reinforced composite materials consist of high-strength and modulus fibers embedded in or bonded to a matrix with distinct boundaries (interfaces) between them. The strength of fiber composites when compared to powder reinforcement composites has a higher strength value [3]. Extracted fiber from residues such as woodland, and vegetable biomass is rich in cellulose, hemicellulose, and lignin [4].…”

Section: Introductionmentioning

confidence: 99%

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Composite Manufacturing of Coir Fiber-Reinforced Polyester as a Motorcycle Helmet Material

Sasria

2022

JMPM

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Berdasarkan standar SNI 1811-2007 helm di Indonesia terbuat dari bahan polimer ABS (Acrylonitrile Butadiene Styrene) yang harganya relatif mahal. Oleh karena itu, dibutuhkan alternatif pengganti dengan pemanfaatan limbah serat alam sebagai bahan pembuatan komposit. Tujuan penelitian ini yaitu menganalisis pengaruh komposisi material, ketahanan impak, dan kekuatan bending material helm dari serat sabut kelapa dan resin poliester dengan perbandingan 20%:80%, 40%:60% dan 60%:40%. Ukuran panjang serat yang digunakan adalah 50 mm dengan perlakuan kimia pada serat menggunakan larutan NaOH 5% selama 2 jam. Komposit dibuat dengan metode compression molding. Penelitian ini menggunakan metode pengujian berupa uji impak ASTM D6110, uji tekuk ASTM D790-03, uji mikrostruktur, dan uji SEM. Didapatkan hasil data dengan nilai tenaga patah optimum sebesar 55,542 J dan nilai kekuatan impak optimum sebesar 0,408 J/mm2 pada spesimen B. Hasil uji bending didapatkan nilai kekuatan tekuk optimum sebesar 52,785 MPa dan nilai modulus elastisitas optimum sebesar 13,064 GPa pada spesimen A. Standar uji kekuatan impak menurut SNI 1811-2007 adalah 29000 J/mm, sedangkan nilai kekuatan impak spesimen ini sebesar 0,408 J/mm2 sehingga masih belum mencukupi untuk dijadikan bahan alternatif helm. Based on the SNI 1811-2007 standard, helmets in Indonesia are made of ABS (Acrylonitrile Butadiene Styrene) polymer material which is relatively expensive. Therefore, an alternative is needed by utilizing natural fiber waste reinforced as a composite material. The purpose of the study was to analyze the effect of material composition, impact resistance, and bending strength of helmet material from coconut fiber and polyester resin with a ratio of 20%: 80%, 40%: 60%, and 60%: 40%. The fiber length used is 50 mm, with chemical treatment on the fiber using 5% NaOH solution for 2 hours. Composites were made by the compression molding method. In this study, testing was used in the form of impact test ASTM D6110, bending test ASTM D790-03, microstructure test, and SEM test. The data was obtained with the optimum fracture strength value of 55.542 J and the optimum impact strength value of 0.408 J/mm2 on specimen B. In the bending test, the data was obtained with the optimum bending strength value of 52.785 MPa and the optimum elastic modulus value of 13,064 GPa at specimen A. The impact strength test standard according to SNI 1811-2007 is 29000 J/mm, while the impact strength value of this specimen is 0.408 J/mm2. Thus, it is still not sufficient to be used as an alternative helmet material.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Composite Manufacturing of Coir Fiber-Reinforced Polyester as a Motorcycle Helmet Material

Sasria

2022

JMPM

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“…Setelah itu, serat sabut kelapa dicampurkan dengan matriks poliester dengan fraksi volume 34,88%. Ketika dilakukan uji tarik, komposit yang dihasilkan memiliki kekuatan tarik sebesar 17,48 MPa [13] yang nilainya hampir sama dengan penelitian ini.…”

Section: Gambar 2 Spesimen Hasil Uji Tarikunclassified

“…Nilai tersebut mendekati nilai pada penelitian lain [14] dengan modulus elastisitas komposit sabut kelapa sebesar 0,575 GPa. Sedangkan pada penelitian [13], meskipun kekuatan tariknya hampir sama (17,48 MPa) ternyata modulus elastisitas nya cukup berbeda yaitu sebesar 0,11 GPa.…”

Section: Gambar 2 Spesimen Hasil Uji Tarikunclassified

Pengembangan Komposit Serat Sabut Kelapa Sebagai Bahan Pembuatan Rangka Surveillance Drone

Muhammad Ikhsan,

Permana,

Arif Pratama

et al. 2024

teknika

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Coconut fiber is an alternative material to replace metal. Coconut fiber was chosen because it is easy and widely found in Indonesia and is easily decomposed naturally. Even though its strength is much lower than metal, coconut fiber can be used to make objects that do not require a lot of strength, one of which is drones. In this research, coconut fiber composites were made and tensile tested to determine their strength for use as a frame for small surveillance drones. The composite is made by mixing coconut fiber mat (as fiber) and Unsaturated Polyester (as resin) using the hand lay-up method. Coconut fiber composites are tested according to ASTM D-638 standards. Based on the tensile test results in this research, it was found that the coconut fiber composite had a tensile strength of 18 MPa. Then this number is used as a benchmark in determining the size of the surveillance drone frame to be designed. Based on the results of the calculations carried out, it was found that the thickness required for a drone frame made from coconut fiber is 4 mm

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“…The tensile test is used to measure the resistance of a material to a statically applied force gradually. The purpose of tensile testing is to determine the strength, strain, and tensile modulus of the composite board that has been made [21]. In this study, the standard used is the ASTM D638 standard The form of the Dimension [22] can be seen in Fig.…”

Section: Tensile Testingmentioning

confidence: 99%

Untitled

2022

Jurnal Polimesin

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Currently, composite applications range from the automotive, marine, and even aircraft sectors. One of the composites that have attracted a lot of attention from researchers is composites with natural fibres because natural fibre composites can be used as an alternative to synthetic or plastic materials. The low-density nature of natural fibres can provide good stiffness and strength as in fiberglass-reinforced composites. Coconut coir fibre and human hair waste are the basic materials for the manufacture of composites in this study. Because the amount is abundant so it is easy to obtain. The purpose of this study was to determine the effect of the variation of the best volume fraction of natural fibre composites with polyester matrix on the mechanical properties. The method used is hand layup with 3 variations of fibre volume fraction and polyester matrix, respectively 10:90, 15:85, and 20:80 and with the size of short hair fibres with a size of 3 cm and long coconut fibres with sizes according to the length of the print. The ratio of human hair fibre and coconut fibber is 1:1. Each fraction was tested 3 times to be more accurate. The results of the average tensile strength test with the largest ASTM D638 standard are at the volume fraction of 10:90 with a tensile strength of 19.2 MPa and the average impact test strength with the largest ISO 179-1 standard at the volume fraction of 20:80 is 17, 67 kJ/m². This study showed that the higher the fibres fraction in the composite, the lower the tensile strength but the higher the impact strength. Vice versa, the lower the fibre fraction in the composite, the tensile strength increases but the impact strength decreases.

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Sifat Tarik, Bending dan Impak Komposit Serat Sabut Kelapa-Polyester dengan Variasi Fraksi Volume

Cited by 7 publications

References 5 publications

Composite Manufacturing of Coir Fiber-Reinforced Polyester as a Motorcycle Helmet Material

Composite Manufacturing of Coir Fiber-Reinforced Polyester as a Motorcycle Helmet Material

Pengembangan Komposit Serat Sabut Kelapa Sebagai Bahan Pembuatan Rangka Surveillance Drone

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