Tensile and flexural properties of snake grass natural fiber reinforced isophthallic polyester composites

Empirical model for predicting fatigue damage behavior of composite materials developed recently has been applied to composite materials made of different fibers in various configurations: carbon and glass fiber noncrimp fabric reinforced epoxy composites, chopped strand mat glass fiber-reinforced polyester composites, randomly oriented nonwoven hemp fiber-reinforced polyester composites, and glass/hemp fiber-reinforced polyester hybrid composites. The fatigue properties were evaluated in tension–tension mode at stress ratio R = 0.1 and frequency of 1 Hz. The experimental fatigue data were used to determine the material parameters required for the model. It has been found that the model accurately predicts the degradation of fatigue life of composites with an increase in number of fatigue cycles. The scope of applicability of this model has thus been broadened by using the fatigue data of natural fiber and noncrimp fabric composites.

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THERMO-MECHANICAL INVESTIGATION OF HYBRID PARTICULATE BANANA/SISAL FIBER REINFORCED POLYESTER MATRIX COMPOSITE

Journal of Southwest Jiaotong University ◽

10.35741/issn.0258-2724.56.4.67 ◽

2021 ◽

Vol 56 (4) ◽

pp. 783-792

Author(s):

Ekene G. Okafor ◽

Mohammed T. Abba ◽

Mohammed H. Mohammad ◽

Osichinaka C. Ubadike ◽

Paul O. Jemitola ◽

...

Keyword(s):

Mechanical Properties ◽

Acetic Acid ◽

Matrix Composite ◽

Natural Fiber ◽

Sisal Fiber ◽

Flexural Properties ◽

Thermal And Mechanical Properties ◽

Fiber Reinforced ◽

Polyester Matrix ◽

The Impact

An increasing desire is to produce eco-friendly materials for varied engineering applications, such as natural fiber-reinforced composites (NFRCs). Although many research works on natural fiber polymer matrix composite exist, not much is known on the thermo-mechanical properties of acetic acid-treated particulate banana-sisal fiber reinforced polyester composite. Additionally, establishing the fiber constituent with a detrimental effect on thermal and mechanical properties for acetic acid-treated particulate banana-sisal reinforced polyester matrix composite is not well known. This work aims to examine the effect of banana-sisal particulate fiber on the thermal and mechanical properties of banana-sisal reinforced polyester matrix composites to address the gap. The composites were produced via the mechanical stir mix technique. Thermal, Fourier-transform infrared spectroscopy (FTIS), compressive, flexural, and impact analysis were conducted according to appropriate test standards. The results revealed that the thermal properties of the developed composites were not dependent on hybridization. Also, hybridization significantly enhanced the compressive and flexural properties, with 70B/30S and 50B/50S particulate fiber reinforced polyester matrix composite found to have the most superior compressive and flexural properties. A major contribution of this study is that the impact properties of the developed composites were dependent on the fiber composition and decreased as the sisal content percentage increased. In general, reinforced polyester matrix composite with 70B/30S particulate fiber has a preferable combination of thermal and mechanical properties.

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The Effect of Alkali Treatment And Microcrystalline Cellulose Addition on Density Value of Cantala Fiber Reinforced Unsaturated Polyester Composites

Mekanika: Majalah Ilmiah Mekanika ◽

10.20961/mekanika.v20i1.47460 ◽

2021 ◽

Vol 20 (1) ◽

pp. 1

Author(s):

Muhammad Ghozali ◽

Dody Ariawan ◽

Eko Surojo

Keyword(s):

Microcrystalline Cellulose ◽

Natural Fiber ◽

Volume Fraction ◽

Treatment Time ◽

Alkali Treatment ◽

Unsaturated Polyester ◽

Reinforced Composites ◽

Fiber Reinforced ◽

Molding Method ◽

Polyester Composites

Natural fiber reinforced composites is one materials potentially developing in Indonesia. One of biggest problem with composites specimen is its void. One properties to find out void of composites is composites density value. The objective of research is to investigate the effect of fiber alkali (NaOH) treatment and microcrystalline cellulose (MCC) addition on density value of cantala fiber reinforced unsaturated polyester composites. Firstly, cantala fibers was submerged into alkali (NaOH) 6% solution for 0, 3, 6, 9, and 12 hours. Furthermore, the fiber was washed using acetid acid and then using clean water to reach pH 7. Thereafter, cantala fiber was dried in the oven for 10 hours at temperature 600C. Composites was composed of cantala fiber, unsaturated polyester polymer matrix, and microcrystalline cellulose according to the composition with volume fraction 30%. Composites was casted using compression molding method with compressive strength of 10 MPa for 12 hours. All specimens of composites undertake post cure for 2 hours at 600C. Density test was conducted using densimeter by calculating the density of composites in the air and the water. The result of research showed that the longer the alkali treatment time and the more addition of microcrystalline cellulose (MCC) filler, the higher is the composites density. The higher density value of cantala fiber reinforced unsaturated polyester is alkali treatment 6 hours, which was 1.223 gr/cm3.

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