A statistical analysis of fibre size and shape distribution after compounding in composites reinforced by natural fibres

Moigne, Nicolas Le; Oever, Martien van den; Budtova, Tatiana

doi:10.1016/j.compositesa.2011.07.012

Cited by 87 publications

(74 citation statements)

References 24 publications

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“…Since the results of the fibre length measurements are not distributed normally, the median values are utilised. As reported by Le Moigne et al [15] fibre length can be strongly influenced and biased by extreme values. It is obvious that the median fibre length of virgin lyocell 1.3 dtex/PLA with a value of 467 µm is clearly higher than the critical fibre length L c (220 µm [35]), while the fibre length of the reprocessed composite is on the level with the L c Figure 7b); the reprocessed composite contains 48% fibres longer than L c .…”

Section: Fibre Length Distributionmentioning

confidence: 82%

“…Beaugrand and Berzin have shown that the aspect ratio of hemp fibres in a polycaprolactone (PCL) matrix increases when plasticised in water [14]. Le Moigne et al [15] investigated the length and aspect ratio of flax, sisal and wheat straw extracted from their PP based composites after injection moulding. Flax was mainly broken into elementary fibres whereas sisal still showed fibre bundles and single fibres.…”

Section: Introductionmentioning

confidence: 99%

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Influence of reprocessing on fibre length distribution, tensile strength and impact strength of injection moulded cellulose fibre-reinforced polylactide (PLA) composites

Graupner

Albrecht²,

Ziegmann³

et al. 2016

Express Polym. Lett.

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Abstract. The present study focuses on the reprocessing behaviour of recycled injection moulded polylactide (PLA) composites. The composites are reinforced with regenerated cellulose fibres (lyocell) of variable fineness and a fibre mass content of 30%. They were reprocessed up to three times. The influence of reprocessing on the fibre length distribution and the resulting composite mechanical properties (tensile and impact strength) was analysed. While the first reprocessing cycle does not affect the mechanical characteristics of the neat PLA matrix, the strength of the composites decreases significantly due to a decreasing fibre aspect ratio. It was shown that fibres having a larger cross-sectional area display a lower aspect ratio than finer fibres, after reprocessing. This phenomenon leads to a larger decrease in tensile strength of composites reinforced with coarser fibres when compared to composites reinforced with finer fibres. A comparison of virgin composites and threefold reprocessed composites with a similar fibre length distribution resulted in a significantly higher tensile strength compared to the virgin sample. This result leads to the conclusion that not only the fibre length is drastically reduced by reprocessing but also that the fibres and the matrix were damaged.

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Section: Fibre Length Distributionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Influence of reprocessing on fibre length distribution, tensile strength and impact strength of injection moulded cellulose fibre-reinforced polylactide (PLA) composites

Graupner

Albrecht²,

Ziegmann³

et al. 2016

Express Polym. Lett.

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“…First, Oksman et al (2009) compared sisal, flax, banana and jute, and found that flax fibres obtained by enzymatic retting process and having low lignin content, are better separated than the others in natural fibre reinforced PP. In Le Moigne et al (2011) study, flax fibres were also separated in elementary fibres while sisal fibres remained partly in bundles and wheat straw provided bundles and large amounts of small particles.…”

Section: Introductionmentioning

confidence: 95%

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Gamon

Evon

Rigal

2013

Industrial Crops and Products

117

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. b s t r a c tNatural fibres from miscanthus and bamboo were added to poly(lactic acid) by twin-screw extrusion. The influence of extruder screw speed and of total feeding rate was studied first on fibre morphology and then on mechanical and thermal properties of injected biocomposites. Increasing the screw speed from 100 to 300 rpm such as increasing the feeding rate in the same time up to 40 kg/h helped to preserve fibre length. Indeed, if shear rate was increased with higher screw speeds, residence time in the extruder and blend viscosity were reduced. However, such conditions doubled electrical energy spent by produced matter weight without significant effect on material properties. The comparison of four bamboo grades with various fibre sizes enlightened that fibre breakages were more consequent when longer fibres were added in the extruder. Longer fibres were beneficial for material mechanical properties by increasing flexural strength, while short fibres restrained material deformation under heat by promoting crystallinity and hindering more chain mobility.

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“…Besides mentioned fibers, every day new fibers appear as an alternative to produce natural composites, in literature there are studies with palmers fibers [41] , wheat straw [117] and rice straw [190] , pineapple crown [41] , banana pseudostem [186,191] , banana pells [95] and many other fibers can be extracted from different regions of the world.…”

Section: Lignocellulosic Fibers As Reinforcement In Compositesmentioning

confidence: 99%

“…Polypropylene (PP) curaua [116] , flax [92,117,118] , green coconut husks [93,96] , hemp [119] , jute [101,120] , palm [96] , sisal [99,117,121] , sugarcane bagasse [110,122] ,wheat straw [117] Polyethylene (PE) banana [123] , green coconut husks [124] , rice husk [125] , sisal [126] , sugarcane bagasse [22] High density polyethylene (HDPE) banana [127] , curaua [94,116] , sisal [102] , wood [128] High Impact Polystyrene (HIPS) green coconut husks [129] , sisal [130] , sugarcane bagasse [131] Thermoset…”

Section: Thermoplastic Vegetal Fibersmentioning

confidence: 99%

Vegetal fibers in polymeric composites: a review

et al. 2015

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RbstractThe need to develop and commercialize materials containing vegetal fibers has grown in order to reduce environmental impact and reach sustainability. Large amounts of lignocellulosic materials are generated around the world from several human activities. The lignocellulosic materials are composed of cellulose, hemicellulose, lignin, extractives and ashes. Recently these constituents have been used in different applications; in particular, cellulose has been the subject of numerous works on the development of composite materials reinforced with natural fibers. Many studies have led to composite materials reinforced with fibers to improve the mechanical, physical, and thermal properties. Furthermore, lignocellulosic materials have been treated to apply in innovative solutions for efficient and sustainable systems. This paper aims to review the lignocellulosic fibers characteristics, as well as to present their applications as reinforcement in composites of different polymeric matrices.

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A statistical analysis of fibre size and shape distribution after compounding in composites reinforced by natural fibres

Cited by 87 publications

References 24 publications

Influence of reprocessing on fibre length distribution, tensile strength and impact strength of injection moulded cellulose fibre-reinforced polylactide (PLA) composites

Influence of reprocessing on fibre length distribution, tensile strength and impact strength of injection moulded cellulose fibre-reinforced polylactide (PLA) composites

Twin-screw extrusion impact on natural fibre morphology and material properties in poly(lactic acid) based biocomposites

Vegetal fibers in polymeric composites: a review

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