Impact and flexural properties of flax fabrics and Lyocell fiber-reinforced bio-based thermoset

Abstract

A bio-based thermoset resin was reinforced with flax fabrics and Lyocell fiber. The effect of different weave architectures was studied with four flax fabrics with different architectures: plain, twill (two different types), and dobby. The effect of the outer ply thickness was studied and characterized with flexural and impact testing. Composites manufactured with plain weave reinforcement had the best mechanical properties. The tensile strength, tensile modulus, flexural strength, flexural modulus, and impact strength were 280 MPa, 32 GPa, 250 MPa, 25 GPa, and 75 kJ/m 2 , respectively. Reinforcements with twill-weave architecture did not impart appreciable flexural strength or flexural modulus even when the outer thickness was increased. Plain-and dobby (basket woven style)-weave architectures gave better reinforcing effects and the flexural properties increased with an increase in outer thickness. Water absorption properties of the composites were studied and it was observed that the hybridization with Lyocell fiber reduced the water uptake. Fieldemission scanning electron microscopy was used to study the micro-structural properties of the composites.

The Accelerated Aging Effect of Salt Water on Lignocellulosic Fibre Reinforced Composites

“…These results are in line with similar researches, as reported in [41], where the influence of direction of fibres on the flexural properties in a flax fibre-reinforced composite (with acrylated epoxidized soybean matrix) was analysed. In particular, it is demonstrated that significantly better improvements could be obtained when a unidirectional fabric is preferred to the balanced one.…”

Impact toughness, viscoelastic behavior, and morphology of polypropylene–jute–viscose hybrid composites

“…This behavior was also confirmed by static mechanical testing. Adekunle et al . noted a similar finding in flax‐fiber‐reinforced biobased resins with Lyocell as an impact modifier.…”

Novel Hybrid Flax Reinforced Supersap Composites in Automotive Applications

“…Hence the environmental footprint of superlight electric vehicles could be reduced through the use of flax/bio-epoxy composites [1][2][3]. Their mechanical performance, together with the environmental benefits make bio-epoxy/flax composites suitable for load-bearing parts, such as vehicle body panels, crash elements, body trims and body chassis [4][5][6][7][8]. Adhekunle et al [4] manufactured flax/bio-thermoset (methacrylated soybean oil and methyacrylic anhydride modified soybean oil) composites with different fibre stacking sequences and lay-up angles, leading to a maximum tensile strength of 119 MPa and Young's modulus of 14 GPa.…”