Semichemical fibres of Leucaena collinsii reinforced polypropylene: Macromechanical and micromechanical analysis

Granda, L.A.; Espinach, Francesc X.; López, Francisco; García, Juan Carlos Figueroa; Delgado-Aguilar, Marc; Mutjé, Pere

doi:10.1016/j.compositesb.2016.01.035

Cited by 46 publications

(70 citation statements)

References 43 publications

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“…The values for the polyolefin-based composites were found to be higher than of the PTA-based ones. The values were in agreement with prior natural fiber reinforced composites micromechanical analyses (Lopez et al 2012b;Espinach et al 2013b;Granda et al 2016).…”

Section: Micromechanical Analysis Of the Young's Modulussupporting

confidence: 79%

“…Nonetheless, the values were very similar, while the intrinsic tensile Young's moduli were very matrix dependent. Although the literature indicates that the interphase between the fibers and the matrix has little influence on the Young's modus of a composite, this seems to be certain when the matrix was the same, or belongs to the same chemical family (Lopez et al 2012b;Reixach et al 2013a;Granda et al 2016).…”

Section: Micromechanical Analysis Of the Young's Modulusmentioning

confidence: 99%

“…Further, such composites difficult to recycle, and their abrasiveness results in early wearing out of manufacturing machinery, as well as an unhealthy working environment for its operators (Wang et al 1993;Granda et al 2016). A lot of effort has been devoted to searching for more environmentally friendly and healthier alternatives to GF as composite reinforcement, and many authors have pointed to natural fibers as a possible replacement (MartinezUrreaga et al 2015;Scarponi and Messano 2015;da Luz et al 2016;Granda et al 2016). In contrast to GF, the natural fibers are cheap, easily available, and a renewable source of reinforcement material.…”

Section: Introductionmentioning

confidence: 99%

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Sugarcane Bagasse Reinforced Composites: Studies on the Young’s Modulus and Macro and Micro-Mechanics

et al. 2017

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The stiffness of a material greatly influences its possible use as an engineering material. Thus, despite the theoretical environmental advantages of natural fiber reinforced composites, or fully biodegradable composites, if certain mechanical properties are not achieved, a material can have fewer engineering uses. In this work, sugarcane bagasse fibers, a by-product of the sugarcane-juice extraction process, were used to obtain reinforcing fibers. Two polyolefins, a polypropylene and a highdensity polyethylene, and a starch-based polymer were used as matrices. The composite materials were prepared and tested to obtain their tensile properties such as the Young's moduli. Some micromechanical models were used to obtain the intrinsic Young's moduli of the fibers and the efficiency factors. The dependence of such parameters on the matrix and fibers characteristics was studied. The fiber orientation efficiency factor was used to compute the orientation angle of the fibers inside the composite under three different distributions. Finally, the Tsai and Pagano models, and the Halpin and Tsai equations were used to compute the theoretical values of the Young's moduli of the composites.

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Section: Micromechanical Analysis Of the Young's Modulussupporting

confidence: 79%

Section: Micromechanical Analysis Of the Young's Modulusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sugarcane Bagasse Reinforced Composites: Studies on the Young’s Modulus and Macro and Micro-Mechanics

et al. 2017

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“…Moreover, Figure 1a shows that the evolution of the tensile strength is also linear against CF content. The literature indicates that such behavior is possible when a proper dispersion of the reinforcements inside the composite and a strong interphase between the fibers and the matrix is also present [41]. In the case of the Young's modulus of the composites, a sustained and linear increase against CF content was also observed (Figure 1b).…”

Section: Tensile Properties Of Curauá Reinforced Polypropylene Composmentioning

confidence: 79%

Explorative Study on the Use of Curauá Reinforced Polypropylene Composites for the Automotive Industry

et al. 2019

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The automotive industry is under a growing volume of regulations regarding environmental impact and component recycling. Nowadays, glass fiber-based composites are commodities in the automotive industry, but show limitations when recycled. Thus, attention is being devoted to alternative reinforcements like natural fibers. Curauá (Curacao, Ananas erectifolius) is reported in the literature as a promising source of natural fiber prone to be used as composite reinforcement. Nonetheless, one important challenge is to obtain properly dispersed materials, especially when the percentages of reinforcements are higher than 30 wt %. In this work, composite materials with curauá fiber contents ranging from 20 wt % to 50 wt % showed a linear positive evolution of its tensile strength and Young's modulus against reinforcement content. This is an indication of good reinforcement dispersion and of favorable stress transfer at the fiber-matrix interphase. A car door handle was used as a test case to assess the suitability of curauá-based composites to replace glass fiber-reinforced composites. The mechanical analysis and a preliminary lifecycle analysis are performed to prove such ability.The light-weighting of a vehicle can be achieved by design changes, modification of the construction processes or the use of light engineering materials [2,5]. In addition to the above-mentioned regulations, the automotive industry has also to fulfill new regulations related to the end of life of the vehicles. Such regulations, like the European Union (EU) End of Life Vehicle directive, restrict the amount of vehicle that can be landfilled at its disposal. This directive enforces recovering and reusing at least 95% of the vehicle [6,7].The automotive industry has explored alternatives to steel that provide the required mechanical properties while being lighter. These materials include metals like aluminum or magnesium, polymers like polyolefin, or composite materials like glass fiber or natural fiber-reinforced polymers. Moreover, alternative materials must show technical, economic and environmental performances [2].The use of natural fiber-reinforced polymers has caught the attention of automotive industry, due to certain reasons. On the one hand, natural fibers come from renewable resources, locally available and comparatively cheaper than mineral fibers [8][9][10]. On the other hand, natural fibers are lighter than glass fibers, and thus, natural fiber-reinforced materials tend to show higher specific properties [11]. Nowadays, the use of natural fiber-reinforced composites has increased [9]. These materials are used for globe boxes, door panels, seat coverings, seat surfaces, trunk panels, trunk floors, spare tire covers, insulation, headliners, or dashboards [9,12]. The use of natural fiber-reinforced composites has been limited to non-structural or semi-structural purposes, and usually as an alternative to glass fiber-reinforced materials [9,12,13]. The most common natural fibers used as reinforcement in the automotive industry are jute, ...

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“…Strategies based on economic performance may attempt to reduce the weight percentage of expensive matrices by adding cheap fillers (Gu et al 2016). The property-based point of view is more interested in achieving higher tensile strengths or stiffness by introducing reinforcements (Vallejos et al 2012;Reixach et al 2015;Granda et al 2016). However, the environmental strategy focuses on replacing one or all the phases of a composite with more environmentally friendly components (Serrano et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Starch-Based Biopolymer Reinforced with High Yield Fibers from Sugarcane Bagasse as a Technical and Environmentally Friendly Alternative to High Density Polyethylene

Jiménez¹,

Espinach²,

Delgado-Aguilar³

et al. 2016

BioResources

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Greener composites, as alternatives to more common materials, should also achieve technical and economic feasibility to be commercially competitive. This study presents the results obtained from using a biodegradable starch-based matrix, and a natural fiber reinforcement coming from sugarcane bagasse, currently an agro-waste. The sugarcane bagasse biomass was treated to obtain four kinds of fibers with different morphological and chemical properties. The fibers were used to obtain composite materials, which were then tested for tensile properties. The results showed that some of the composites were suitable to replace high density polyethylene, from a technical and environmental point of view. The comparatively higher cost of the biobased matrices hinders the substitution, but the higher the fiber content, the lower the economic disadvantage. A micromechanical test and a sensitivity analysis showed that the fiber orientation had the highest impact on the tensile strength, followed by the fibers mean length and the quality of the interphase between the fibers and the matrix.

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Semichemical fibres of Leucaena collinsii reinforced polypropylene: Macromechanical and micromechanical analysis

Cited by 46 publications

References 43 publications

Sugarcane Bagasse Reinforced Composites: Studies on the Young’s Modulus and Macro and Micro-Mechanics

Sugarcane Bagasse Reinforced Composites: Studies on the Young’s Modulus and Macro and Micro-Mechanics

Explorative Study on the Use of Curauá Reinforced Polypropylene Composites for the Automotive Industry

Starch-Based Biopolymer Reinforced with High Yield Fibers from Sugarcane Bagasse as a Technical and Environmentally Friendly Alternative to High Density Polyethylene

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