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Mechanical properties evaluation of banana fibre reinforced polymer composites: a review

Gairola Surya P., Tyagi Yogesh, Gupta Nitin

Acta Innovations

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2022

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no. 42

59--70

EN

In today's fast-developing world, the use of composite materials is closely related to environmental pollution, renewable and biodegradable resources. A researcher is looking for environmentally friendly materials. Natural and synthetic fibres come in a wide range of shapes and sizes. Natural fibres include jute, straw wheat, rice husk banana fibre, pineapple leaf fibre, cotton, Sisal, Coir, Oats, and Bagasse. Every year, 13.5 tonnes of banana fibre are produced in India. Teabags, paper, and polymer composite reinforcement are just a few of the applications for banana fibre. This article focuses on the manufacture of banana fibre with epoxy and a variety of other natural fibres. By combining banana fibre with some current technology, waste will be reduced, and energy efficiency will be increased, all while supporting sustainability. Banana fibres are covered in this work, along with their uses, applications, and mechanical qualities, as well as how banana fibre might improve mechanical properties.

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Physio-mechanical & wear performance of banana fiber/walnut powder based epoxy composites

Gairola Surya P., Tyagi Yogesh, Gangil Brijesh, Jha Kanishk

Acta Innovations

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2021

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no. 41

42--55

EN

The present environmental condition indicates the immediate need for sustainable materials containing mainly natural elements for composite fabrication. Encouragement of natural fibers in composite materials can significantly reduce the greenhouse effect and the high cost of manufacturing synthetic fiber-based polymer composites. Hence, this study aimed to investigate the physio-mechanical properties of banana fiber (BF) fiber - based epoxy (EP) composites filled with walnut shell powder (WNP). Fabrication was carried out by mixing and cold pressing with fixed BF proportion and varying percentages of WNP (0%, 5%, 10%, 15 wt. %). The results obtained in the study suggest the mechanical properties of the BF/EP composite were enhanced with the addition of WNP as a filler. This is because the WNP filler occupies the spaces in the composite, which bridge the gaps between the banana fibers and the epoxy matrix; also, the inclusion of walnut powder in the BF/EP composites greatly enhanced their wear resistance. The microstructural properties of the composites were examined by scanning electron microscopy (SEM).

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Biokompozyty na podstawie polilaktydu wzmacniane włóknami pochodzenia naturalnego

Błędzki A. K., Jaszkiewicz A.

Polimery

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2008

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T. 53, nr 7-8

564-570

PL

Zbadano wpływ rodzaju wzmocnienia włóknistego - regenerowanej celulozy (wiskozy) i włókien bananowca (abaka) - na właściwości mechaniczne biokompozytów opartych na polilaktydzie (PLA) jako matrycy polimerowej. Biokompozyty z 15 % mas. bądź 30 % mas. udziałem włókien wytworzono metodą dwuetapowego wytłaczania, polegającą na powlekaniu włókna ciągłego warstwą PLA i następnej homogenizacji układu. Ocena właściwości mechanicznych obejmowała wyniki quasi-statycznej próby rozciągania i zginania oraz badania udarności z karbem biokompozytów. Jako układy porównawcze posłużyły kompozyty polipropylenu zawierające 30 % mas. wspomnianych dwóch rodzajów włókien. Mechanizm adhezji ma granicy włókno/PLA oraz orientację włókna wyodrębnionego z kompozytów zinterpretowano na podstawie obserwacji metodami skaningowej mikroskopii elektronowej (SEM) oraz mikroskopii optycznej. Wyniki wskazują, że dodatek do PLA obydwu typów włóknistego wzmocnienia powoduje wzrost sztywności i wytrzymałości badanych próbek, przy czym zwłaszcza korzystny jest 30-proc. udział włókien. Na uwagę zasługuje w szczególności znaczna (3,6-krotna) poprawa udarności z karbem układu PLA/wiskoza (70:30). Uzyskane rezultaty wskazują na potencjalną możliwość wytwarzania przyjaznych dla środowiska tworzyw konstrukcyjnych na podstawie opartych na surowcach pochodzenia naturalnego zarówno matrycy polimerowej, jak i wzmocnienia włóknistego.

EN

The effect of the type of fiber reinforcement - regenerated cellulose (viscose) or banana reinforcing fibers (abaca, Fig. 2) - on mechanical properties of biocomposites, based on polylactide (PLA) as polymer matrix, has been studied. Biocomposites containing 15 or 30 wt. % of fibers were prepared by two-stage extrusion consisting in coating of continuous filament with PLA layer and further homogenization of the system (Fig. 1). Mechanical properties' evaluation encompassed the results of quasi-static tensile and bending tests as well as notched impact strength investigation (Table 2). Polypropylene composites containing 30 wt. % of the fibers mentioned were used as control systems. Adhesion mechanism at the border of fiber and PLA and the orientation of the fiber isolated from the composite were interpreted on the basis of scanning electron microscopy (SEM, Fig. 3 and 5) and optical microscopy (Fig. 6 and 7) results. The results show that the addition of any of both types of fiber reinforcements increase composite's stiffness and strength. 30 % part of fiber is especially advantageous. Significant improvement in notched impact strength (3.6-fold) of PLA/viscose (70:30) system is especially noteworthy. The results obtained show the possibility of preparation of environmentally friendly engineering plastics consisted of polymer matrix and fiber reinforcement, both based on natural resources.