Measure of porosity in flax fibres reinforced polylactic acid biocomposites

Kergariou, Charles de; Duigou, Antoine Le; Popineau, Victor; Gager, Victor; Kervoëlen, Antoine; Perriman, Adam W.; Saidani-Scott, Hind; Allegri, Giuliano; Panzera, Túlio Hallak; Scarpa, Fabrizio

doi:10.1016/j.compositesa.2020.106183

Cited by 38 publications

(23 citation statements)

References 36 publications

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“…The higher value of strain to failure has contributed to energy absorption larger area under of S‐S curve) of the composite. [ 46 ] Cordin et al, reported that when fiber orientation angles are between 0° and ±45°, the composites become softer, so that the materials are easier to deform and the elongation becomes large. From Table 3 and Figure 7, it is clear that both basalt and glass fabric reinforced composite at 0° orientation exhibit brittle fracture, characterized by a sharp drop in load immediately after reaching the maximum tensile stress.…”

Section: Resultsmentioning

confidence: 99%

“…The actual fiber volume fractions of both fibers were determined from their density, porosity, and weight. [ 46 ] The actual porosity of the fiber was determined based on the specific surface area, using CNC based optical microscopic as shown in Figure 4. The density of all composites reported in Table 2 was determined experimentally in accordance to ASTM D 792.…”

Section: Resultsmentioning

confidence: 99%

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Studies on mechanical and fracture properties of basalt/E‐glass fiber reinforced vinyl ester hybrid composites

Jeevi

Ranganathan

2022

Polymer Composites

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In this study, a comparative analysis of basalt, E‐glass and hybrid fiber reinforced vinyl ester composites was carried out. Composites were fabricated using vacuum infusion process with 0°/90° and ±45° as fiber orientation angles. The influence of volume fraction on mechanical behaviors and surface morphology of impact fractured composites were analyzed. The glass and basalt fibers oriented at 0° have shown higher load bearing capability, whereas the fibers oriented at 45° angle have shown higher plastic deformation. Hybridized composite having silane treated glass fibers has shown enhanced mechanical properties including tensile strength, bending strength, toughness, and elongation at break due to good bonding between fibers and polymer matrix. The tough and flexible interface between fiber and matrix dissipates more energy through stress transfer from matrix to fiber, allowing increased resistance to shearing. The impact test of BGS‐0.2 hybrid composite showed 103% and 108% of strength improvement compared to basalt (B‐0) and glass fiber (G‐0) reinforced laminates, respectively. However, the fiber orientation at 45 degree showed reduced the strength and modulus with high elongation. The fractography micrographs of hybrid composites have shown the effectiveness of basalt and glass fiber orientation in the composites and bonding between fiber and matrix indicating flexible interphase between the fiber and matrix during impact loading. The composites added with silane have shown marginal increase in water uptake due to presence of polar functional groups in the coupling agent.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Studies on mechanical and fracture properties of basalt/E‐glass fiber reinforced vinyl ester hybrid composites

Jeevi

Ranganathan

2022

Polymer Composites

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“…Density, porosity and water absorption are some of the most important properties for FRP in engineering applications. This is especially true for natural FRP due to the adverse effects on their properties and thus their long-term performance [ 35 , 36 ]. The physical properties of 6 mm flax-ft ADNFRC was investigated.…”

Section: Resultsmentioning

confidence: 99%

Natural Fibres as a Sustainable Reinforcement Constituent in Aligned Discontinuous Polymer Composites Produced by the HiPerDiF Method

et al. 2021

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Sustainable fibre reinforced polymer composites have drawn significant attention in many industrial sectors as a means for overcoming issues with end-of-life regulations and other environmental concerns. Plant based natural fibres are considered to be the most suitable reinforcement for sustainable composites since they are typically from renewable resources, are cheap, and are biodegradable. In this study, a number of plant based natural fibres-curaua, flax, and jute fibres-are used to reinforce epoxy, poly(lactic acid) (PLA), and polypropylene (PP) matrices to form aligned discontinuous natural fibre reinforced composites (ADNFRC). The novel HiPerDiF (high performance discontinuous fibre) method is used to produce high performance ADNFRC. The tensile mechanical, fracture, and physical (density, porosity, water absorption, and fibre volume fraction) properties of these composites are reported. In terms of stiffness, epoxy and PP ADNFRC exhibit similar properties, but epoxy ADNFRC shows increased strength compared to PP ADNFRC. It was found that PLA ADNFRC had the poorest mechanical performance of the composites tested, due principally to the limits of the polymer matrix. Moreover, curaua, flax (French origin), and jute fibres are found to be promising reinforcements owing to their mechanical performance in epoxy and PP ADNFRC. However, only flax fibre with desirable fibre length is considered to be the best reinforcement constituent for future sustainable ADNFRC studies in terms of mechanical performance and current availability on the market, particularly for the UK and EU.

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“…JFs consist of a high percentage of hollow lumen structures, which could be beneficial for sound energy conversion [ 31 ]. However, this lumen will never contribute to the mechanical properties [ 32 ] and will remain as it is inside the composites, and the lumen is a large tubular void in the middle of each NF [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Elastic Properties of Jute Fiber Reinforced Polymer Composites with Different Hierarchical Structures

et al. 2022

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A two-stage micromechanics technique is used to predict the elastic modulus, as well as the major and minor Poisson’s ratio of unidirectional natural fiber (NF) reinforced composites. The actual NF microstructure consists of cellulose, hemicellulose, lignin, lumen, etc., and these constituents and their contributions are neglected in classical models while quantifying their mechanical properties. The present paper addresses the effect of the real microstructure of the natural jute fiber (JF) by applying a micromechanics approach with the Finite Element Method. Six different hierarchically micro-structured JFs are considered to quantify the JF elastic properties in the first level of homogenization. Later, the JF reinforced polypropylene matrix properties are investigated in the second stage by adopting a homogenization approach. Taking into account the different hierarchical structures (HS), the fiber direction modulus (E1), transverse modulus (E2 and E3), in-plane and out-of-plane shear modulus (G12 and G23), and major (ν12, ν13) and minor (ν23, ν21) Poisson’s ratios are estimated for JF and JF reinforced polypropylene composites. The predicted elastic modulus from micromechanics models is validated against the analytical results and experimental predictions. From the present work, it is observed that the HS of NF needs to be considered while addressing the elastic properties of the NF-reinforced composite for their effective design, particularly at a higher volume fraction of NF.

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Measure of porosity in flax fibres reinforced polylactic acid biocomposites

Cited by 38 publications

References 36 publications

Studies on mechanical and fracture properties of basalt/E‐glass fiber reinforced vinyl ester hybrid composites

Studies on mechanical and fracture properties of basalt/E‐glass fiber reinforced vinyl ester hybrid composites

Natural Fibres as a Sustainable Reinforcement Constituent in Aligned Discontinuous Polymer Composites Produced by the HiPerDiF Method

Elastic Properties of Jute Fiber Reinforced Polymer Composites with Different Hierarchical Structures

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