A review on the degradability of polymeric composites based on natural fibres

Azwa, Z. N.; Yousif, B. F.; Manalo, Allan; Karunasena, Warna

doi:10.1016/j.matdes.2012.11.025

Cited by 1,204 publications

(836 citation statements)

References 58 publications

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“…The studies regarding natural fiber reinforced composite focused on the interface between matrix and filler, morphologies, mechanical properties and thermal properties [10][11][12][13][14][15][16]. The concern for environmental issues such as ingestion of plastic by animals has sparked the necessity to study about natural fibres to replace synthetic fibres [17]. The depletion of crude oil and high cost of producing it has urged the studies for a suitable replacement for synthetic fiber [18].…”

Section: Introductionmentioning

confidence: 99%

The performance of mengkuang leaf fiber reinforced low density polyethylene composites

Halim¹,

Siregar²,

Mathivanan³

et al. 2018

J. MECH. ENG. SCI.

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The performance of mengkuang leaf fiber (MLF) reinforced low density polyethylene (LDPE) composites with different fiber volume and different mesh sizes were studied. The fibre weight percentage used in the research were 10%, 20%, and 30% and for different fiber size were <0.5 mm, 0.5-1 mm, and 1-2 mm. The extrusion and hot compression molding were used to fabricate the specimen testing. The mechanical testing performed were impact and flexural test which follows the ASTM standards D790-10 and Izod D256. It was observed that by increasing the fiber volume and fiber size, the flexural strength and the flexural modulus were increased. However the impact strength shows different results for fiber length and fibre content where the impact strength increases with fibre length but decreases with the increase of fiber content. It can be concluded that the 30% fibre content is the optimum fibre loading for the MLF-LDPE composite with the flexural strength of 12.31 MPa, flexural modulus of 378.88 MPa and impact strength of 589.86 J/m whereby the 1.0-2.0 mm fibre length is the best fibre size for the MLF-LDPE composite with the flexural strength of 12.86 MPa, flexural modulus of 267.76 MPa and impact strength of 1511.57 J/m. In future studies fibres should undergo surface modification to increase the available surface area for reaction to increase the strength of the composite by better mechanical interlocking.

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Section: Introductionmentioning

confidence: 99%

The performance of mengkuang leaf fiber reinforced low density polyethylene composites

Halim¹,

Siregar²,

Mathivanan³

et al. 2018

J. MECH. ENG. SCI.

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“…Compositions of PP/olive pit and almond shell flour polymer composites that were formed are given in LyondellBasell. Its density is 0.900 g/cm 3 . Olive pit and almond shell were pulverized (about 40 nm size) with Siemens simatic C7-621 control system device.…”

Section: Methodsmentioning

confidence: 99%

“…The chemical composition of which; mainly composed of lignin, hemicellulose and cellulose. Olive waste has a growing potential as a reinforcement filler materials among many other uses [3][4][5][6][7][8]. Qutaiba studied of a new range of sustainable reinforced polymer composite materials using powdered olive pits as a novel filler material to be used with epoxy resin.…”

Section: Introductionmentioning

confidence: 99%

Polypropylene/olive pit & almond shell polymer composites: wear and friction

Taşdemi̇r

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Wood plastic composites (WPC) are made from wood and annual plant fiber or flours, mixing with plastics materials. WPC provide better properties than resources that form it. This renewable material has many utilization areas because of outstanding properties such as enhanced strength, stiffness, creep, physical and mechanical properties and dimension stability. In the present work, series of filled Polypropylene (PP) composites with olive pit and almond shell flour loading (between 0-40 wt %) were prepared, to study the effect of the filler content on the mechanical, wear and friction properties of polypropylene polymer composites. IntroductionParticularly, researches with regard to wood plastic composite materials have been continuously increased within the last 20 years because of the advantageous characteristics of each constituent in composite materials [1]. It is believed that source of petroleum based products are limited and uncertain. So an alternative with cheap sustainable and easily available raw material is required. The countries growing plant and fruit are not for only agricultural purpose but also to generate raw materials for industries. Most of the developing countries trade lignocellulosic fibers for improving economic condition of poor farmers as much as country support. Recently polymer composites containing cellulosic fibers are under focus in literature as well as industries [2]. The olive oil extraction processes generates huge amounts of solid lignocellulosic waste, representing 30-35% by weight of the olive fruit. The chemical composition of which; mainly composed of lignin, hemicellulose and cellulose. Olive waste has a growing potential as a reinforcement filler materials among many other uses [3][4][5][6][7][8]. Qutaiba studied of a new range of sustainable reinforced polymer composite materials using powdered olive pits as a novel filler material to be used with epoxy resin. Also the influence of the untreated and treated powder loading (weight fraction) on the void content and the mechanical properties of the composites was examined. The results show significant improvements in mechanical properties for composites reinforced with treated olive pits than composites reinforced with untreated olive pits [9]. An investigation was carried out on the effects of olive pit and almond shell powder ratio on the mechanical, wear and friction properties of polypropylene polymer composites. Olive pit and almond shell powder, in four different concentrations (10, 20, 30 and 40 wt %), was added to PP to produce composites. The properties, including density, water absorption, Vicat softening point, heat deflection temperature, wear rate, friction of the composites were investigated.

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“…After their degradation, these are helpful as compost in the field (Kumar et al 2014). Natural polymers are gaining considerable acceptance over synthetic polymers as controlled-release devices because of their eco-friendly nature, cost effectiveness, easy availability, and biodegradability (Azwa et al 2013).…”

Section: Controlled-release Agrochemical Delivery Systems and Their Amentioning

confidence: 99%

Polysaccharides as safer release systems for agrochemicals

Campos

Oliveira

Fraceto

et al. 2014

Agron. Sustain. Dev.

278

175

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Agrochemicals are used to improve the production of crops. Conventional formulations of agrochemicals can contaminate the environment, in particular in the case of intensive cropping. Hence, there is a need for controlledrelease formulations of agrochemicals such as polysaccharides to reduce pollution and health hazards. Natural polysaccharides are hydrophilic, biodegradable polymers. This article reviews the use of polysaccharides in the form of micro-and nanoparticles, beads and hydrogels. The main points are: (1) slow release formulations minimize environmental impact by reducing agrochemical leaching, volatilization and degradation. For example, 50 % of the encapsulated insecticide chlorpyrifos is released in 5 days, whereas free chlorpyrifos is released in 1 day. (2) Slow release formulations increase the water-holding capacity of soil. (3) Slow release formulations better control weeds in the long run. (4) Polymer-clay formulations store ionic plant nutrients. (5) Polymer hydrogel formulations reduce compaction, erosion, and water run-off. They increase soil permeability and aeration, infiltration rates, and microbial activity, and, in turn, plant performance. In conclusion, polysaccharide formulations can be used for safer use of agrochemicals.

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A review on the degradability of polymeric composites based on natural fibres

Cited by 1,204 publications

References 58 publications

The performance of mengkuang leaf fiber reinforced low density polyethylene composites

The performance of mengkuang leaf fiber reinforced low density polyethylene composites

Polypropylene/olive pit & almond shell polymer composites: wear and friction

Polysaccharides as safer release systems for agrochemicals

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