Identification of the Physical and Mechanical Properties of Moroccan Sisal Yarns Used as Reinforcements for Composite Materials

Abstract

This work aims to investigate the physical and mechanical properties of sisal fiber and yarn of Moroccan origin. The cellulosic and non-cellulosic constituents of the Moroccan sisal fiber were identified by FTIR spectroscopy. The thermal properties were studied by thermogravimetric analysis. The hydrophilicity of the fiber was evaluated by the contact angle. The results show that the sisal fiber has a low thermal stability. The mechanical properties of the fiber analyzed by the Impregnated Fiber Bundle Test (IFBT) method show that the porosity of the impregnated yarns and the twist angle of the yarns influence the elastic modulus of the sisal fiber. The physical and mechanical properties of the manufactured sisal yarns were also characterized and analyzed. The obtained results reveal an interesting potential to use the Moroccan sisal fiber in development of bio-sourced composite materials.

Extraction and characterization of a novel tropical fibre Megaphrynium macrostachyum as a biosourced reinforcement for gypsum-based biocomposites

“…The water sensitivity of the fibres can lead to a decrease in fibre strength, as well as in the strength and stiffness of the composite. 12,47 It should be noted that chemical extraction and sodium hypochlorite treatment did not significantly reduce the hydrophilic function of the fibres, which is consistent with the orders of magnitude of the hemicellulose contents. Thus, one way to further reduce the hydrophilic function would be to optimise the chemical extraction process by trying for example other parameters (NaOH concentration, cooking time and temperature) as done by Elseify et al 48 for date palm fibres.…”

Characterization of Tensile Properties of Cola lepidota Fibers

“…These values are the average of ten IFBT specimens. Fibers volume fractions reached are in the range of those obtained by Samouh et al [50] and Lansiaux et al [51] on IFBT specimens made of sisal and flax yarns with the same resin and same manufacturing method, respectively. Samples manufactured with hackled CL fibers bundles show much lower porosities content than for the samples manufactured from non-hackled CL fibers bundle, which can be attributed to the alignment of the fibers that allows a better impregnation.…”

“…These properties are computed with the two different models taking into account (denoted M2, Equation (3)) or not (denoted M1, Equation ( 1)) the porosities level on IFBT samples (Table 3) and for hackled CL fibers (Figure 6a) and nonhackled CL fibers (Figure 6b). As described for sisal fibers [50], when using the modified rule of mixture (model M2) to take into account the level of porosities of IFBT samples result in a higher value of fiber modulus than those back-calculated with the classical rule of mixture (model M1). This difference is more significant for non-hackled CL fibers because the porosity level is much higher.…”

“…These predicted properties concern non-hackled CL fibers to be compared with those identified experimentally. As described for sisal fibers [50], when using the modified rule of mixture (model M2) to take into account the level of porosities of IFBT samples result in a higher value of fiber modulus than those back-calculated with the classical rule of mixture (model M1). This difference is more significant for non-hackled CL fibers because the porosity level is much higher.…”

Influence of sampling area and extraction method on the thermal, physical and mechanical properties of Cameroonian Ananas comosus leaf fibers

“…Such water absorption kinetics have also been observed for other natural fibers ( Baley et al., 2012 ; Hamza et al., 2013 ). This ability to absorb water most often leads to a decrease in the mechanical strength of the fiber, as well as a decrease in stiffness and the appearance of cracks in the composite ( Asim et al., 2015 ; Samouh et al., 2021 ). This remark agrees well with the results of the tensile tests shown in Table 2 .…”