Dynamic and ballistic impact behavior of biocomposite armors made of HDPE reinforced with chonta palm wood (Bactris gasipaes) microparticles

Haro, Edison E.; Szpunar, Jerzy A.; Odeshi, A.G.

doi:10.1016/j.dt.2018.03.005

Cited by 33 publications

(12 citation statements)

References 25 publications

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“…The pressurized type gun barrel was used and the compressed air is forced to release the bullet at the required pressure. The composites samples were fixed in the support frame and the shots are projected on the composite sample from a distance of 5 m. [ 47 ] The initial and residual velocities of the bullet (mass = 0.27 kg) were found out using the chronograph. The load at which the bullet hits the specimen was found out using the load cell.…”

Section: Materials and Experimental Detailsmentioning

confidence: 99%

Mechanical, ballistic impact, and water absorption behavior of luffa/graphene reinforced epoxy composites

KG¹,

Kalaichelvan

2020

Polymer Composites

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The mechanical, ballistic, and moisture intake properties of luffa fiber reinforced with graphene-modified epoxy composites were experimentally investigated. The nanofiller graphene particles were modified with a matrix using the mechanical stirring process. The filler (graphene) of size 20 nm is modified with the matrix of different weight percentages 0, 1, 2, 3, and 4. The samples for various testings were prepared with different compositions using a hand layup technique followed by compression molding. The results show that tensile, impact, and flexural strength were enhanced with the modification of the filler graphene up to 2 wt%. The ballistic impact results show that energy absorption increases with nanofiller modification. Minimum water intake behavior is observed for the composite samples incorporated with fillers. Failure mechanisms were studied on tensile tested specimens using a scanning electron microscopy. The morphological images showed defects like interfacial behavior, fiber pull out, voids, and internal cracks on the tested specimens. K E Y W O R D S ballistic impact behavior, composite material, graphene, Luffa cylindrica, mechanical properties 1 | INTRODUCTION Owing to their ecofriendly character, low cost, and availability, natural fibers created interest among researchers for producing sustainable polymer composites. [1] As the world is focusing on reducing the effect of greenhouse gasses in the atmosphere, the demand for using natural fibers as reinforcements increased. [2,3] Inorganic fibers like carbon, aramid, and glass fibers have good attractive properties that make them ideal for use as reinforcements in polymer composites. [4] Nevertheless, synthetic fibers suffer from nonbiodegradability, high cost, and hazardous gasses during disposal, which made researchers find new alternative materials. [5] Hence, they tried to use natural fibers as alternative materials to overcome the problems of using synthetic fibers. [4,6] Natural fibers like sisal, [7] banana, [8-11] jute, [12-14] coir, [15,16] luffa, [17,18] hemp [19] and flax, [9,20] and so forth are most commonly used as reinforcements in polymer composites and those materials were used in various interior applications such as furniture, acoustics, vibration isolation, packaging, automobile industries, aeronautical, and marine sectors. [21,22] Their hydrophilic nature reduced compatibility, reinforcing effect, and stress transfer with polymer matrices made the natural fiber composites fit for use in light load and interior applications. The properties and quality of composites depend on the degree of compatibility between the matrix and natural fiber. [23-25] To enhance the bonding between the matrix and fibers researchers used different methods, one of which is surface treatments. Generally, surface treatments like alkali, [3,6,26-28] silane, [29,30] benzoylation treatment, [6,31] and so forth are used for treating the fiber surface. Tolera A. Negawo et al [32] studied the influence of alkali

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Section: Materials and Experimental Detailsmentioning

confidence: 99%

Mechanical, ballistic impact, and water absorption behavior of luffa/graphene reinforced epoxy composites

KG¹,

Kalaichelvan

2020

Polymer Composites

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“…It is an Amazonian palm grown mainly for fruit production (Figure 8), known as chontaduro, pejiballe, acana, or pupunha [54]. The chontaduro fruit has considerable concentration of proteins and oil [55], with an important content of linoleic and linolenic polyunsaturated fatty acids [56], as well as β -carotenes [57].…”

Section: Monographsmentioning

confidence: 99%

Antioxidant Properties of Amazonian Fruits: A Mini Review of In Vivo and In Vitro Studies

Avila-Sosa

Montero-Rodríguez

Aguilar-Alonso

et al. 2019

Oxidative Medicine and Cellular Longevity

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Brazil, Colombia, Ecuador, Peru, Bolivia, Venezuela, Suriname, Guyana, and French Guiana share an area of 7,295,710 km2 of the Amazon region. It is estimated that the Amazonian forest offers the greatest flora and fauna biodiversity on the planet and on its surface could cohabit 50% of the total existing living species; according to some botanists, it would contain about 16-20% of the species that exist today. This region has native fruit trees in which functional properties are reported as antioxidant and antiproliferative characteristics. Amazon plants offer a great therapeutic potential attributed to the content of bioactive phytochemicals. The aim of this mini review is to examine the state of the art of the main bioactive components of the most studied Amazonian plants. Among the main functional compounds reported were phenolic compounds, unsaturated fatty acids, carotenoids, phytosterols, and tocopherols, with flavonoids and carotenoids being the groups of greatest interest. The main beneficial effect reported has been the antioxidant effect, evaluated in most of the fruits investigated; other reported functional properties were antimicrobial, antimutagenic, antigenotoxic, analgesic, immunomodulatory, anticancer, bronchodilator, antiproliferative, and anti-inflammatory, including hypercholesterolemic effects, leishmanicidal activity, induction of apoptosis, protective action against diabetes, gastroprotective activity, and antidepressant effects.

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“…The sustainability of the peach palm culture encompasses the development of research for the reuse of residues generated by its processing. Currently, agro-industrial by-products have been employed as a substrate for mushrooms (Sales-Campos et al, 2011) and seedlings (Sá et al, 2020), for manufacturing wood biocomposites (Haro et al, 2018) and wooden panels (Quinaya et al, 2016;Pinheiro et al, 2017), for fabricating biodegradable packaging (Silva et al, 2017;Melo-Neto et al, 2018), as a complement in animal nutrition (Schmidt et al, 2010;Santos-Cabral et al, 2015), and as a soil conditioner (Bellettini et al, 2017). The fruit has been used for flour production (Martínez-Girón et al, 2017), and the oil has applications in cosmetology (Mujica et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Rapid results of peach palm seed viability: a methodological proposition for the tetrazolium test

et al. 2020

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Prior to commercialization, seeds of peach palm (Bactris gasipaes Kunth) have to undergo the germination test, whose well-established methodology takes 120 days. Due to their recalcitrant behavior, the seeds have short longevity when stored (around 30-45 days), which makes it challenging to select the most viable ones for marketing. This study aimed to determine a methodology for the tetrazolium test to be carried out in peach palm seeds, in order to fast deliver results that can be correlated to the germination test. Different forms of pre-conditioning, preparation, and staining were investigated via moisture content, germination, and tetrazolium tests, so as to define the vital parts of the seed and sort out the viability classes. For the seed lot under study, the tetrazolium test delivered results supported by the germination test when the following procedures were adopted: pre-conditioning by water submersion (20 °C for 24 h), longitudinal cut adjacent to the embryo, and half-seed immersion (embryo + endosperm) in a 1.0% tetrazolium solution for 4 h at 30 °C. Having fulfilled these criteria, it became possible to separate the peach palm seeds into two classes (viable or non-viable).

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Dynamic and ballistic impact behavior of biocomposite armors made of HDPE reinforced with chonta palm wood (Bactris gasipaes) microparticles

Cited by 33 publications

References 25 publications

Mechanical, ballistic impact, and water absorption behavior of luffa/graphene reinforced epoxy composites

Mechanical, ballistic impact, and water absorption behavior of luffa/graphene reinforced epoxy composites

Antioxidant Properties of Amazonian Fruits: A Mini Review of In Vivo and In Vitro Studies

Rapid results of peach palm seed viability: a methodological proposition for the tetrazolium test

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