“…In the center of the stem , vascular bundles are clearly apparent in Figure 3(c), where his substance is mostly made of xylem and phloem and is found adjacent to the bundle of fibers. This was previously reported in anatomical investigations on natural fibers by several researchers such as Lygeum spartum L, 29,31 Silybum marianum, 16 Atriplex halimus L, 32 Strelitzia reginae. 33 Figure 3.Microscopic view of CM plant : (a) Cross section, (b) and (c) Zoom view of the fiber cell structure.…”
In this work a new cellulosic fibers extracted from Centaurea Melitensis plant to the prospect of employing them as a source of reinforcement in composite materials. In this investigation, morphological, chemical, physical and mechanical features of Centaurea Melitensis fibers are investigated. The morphological characteristics using anatomical technique and scanning electron microscopy revealed the presence of a large percentage of fibroblasts in the fibers that allow adhesion with the matrix when manufacturing of composite materials. The fiber density is 1.269 ± 0.018 g/cm3 and the diameter is 187.11 ± 60.41 μm depending on the physical properties. The chemical properties revealed that the Centaurea Melitensis fiber has a crystalline size of 16.92 nm and a crystallinity index of 47.69% using XRD. The results of FTIR analysis proved on major components such as cellulose, hemicelluloses and lignin, by TGA the thermal stability was found up to 210°C and the maximum temperature up to 317.86°C. The mechanical properties have shown that the value of the tensile strength of the fibers is 336.87 ± 59.94 MPa, Young’s modulus is 23.87 ± 5.21 GPa, and the strain at failure is 1.27 ± 0.36%, and the interfacial shear strength is 9.82 ± 2.35 MPa. The statistical approach, Weibull distribution was used with two and three parameters to examine the experimental data due to their dispersion. WEIBULL statistical analytical test was used with 2 and 3 parameters are used to examine the experimental data due to their dispersion. All the findings from this investigation reveal that Centaurea Melitensis fibers can be a qualified candidate to be used as reinforcement in low density composite materials.
“…In the center of the stem , vascular bundles are clearly apparent in Figure 3(c), where his substance is mostly made of xylem and phloem and is found adjacent to the bundle of fibers. This was previously reported in anatomical investigations on natural fibers by several researchers such as Lygeum spartum L, 29,31 Silybum marianum, 16 Atriplex halimus L, 32 Strelitzia reginae. 33 Figure 3.Microscopic view of CM plant : (a) Cross section, (b) and (c) Zoom view of the fiber cell structure.…”
In this work a new cellulosic fibers extracted from Centaurea Melitensis plant to the prospect of employing them as a source of reinforcement in composite materials. In this investigation, morphological, chemical, physical and mechanical features of Centaurea Melitensis fibers are investigated. The morphological characteristics using anatomical technique and scanning electron microscopy revealed the presence of a large percentage of fibroblasts in the fibers that allow adhesion with the matrix when manufacturing of composite materials. The fiber density is 1.269 ± 0.018 g/cm3 and the diameter is 187.11 ± 60.41 μm depending on the physical properties. The chemical properties revealed that the Centaurea Melitensis fiber has a crystalline size of 16.92 nm and a crystallinity index of 47.69% using XRD. The results of FTIR analysis proved on major components such as cellulose, hemicelluloses and lignin, by TGA the thermal stability was found up to 210°C and the maximum temperature up to 317.86°C. The mechanical properties have shown that the value of the tensile strength of the fibers is 336.87 ± 59.94 MPa, Young’s modulus is 23.87 ± 5.21 GPa, and the strain at failure is 1.27 ± 0.36%, and the interfacial shear strength is 9.82 ± 2.35 MPa. The statistical approach, Weibull distribution was used with two and three parameters to examine the experimental data due to their dispersion. WEIBULL statistical analytical test was used with 2 and 3 parameters are used to examine the experimental data due to their dispersion. All the findings from this investigation reveal that Centaurea Melitensis fibers can be a qualified candidate to be used as reinforcement in low density composite materials.
“…The comparison of SHUTBE56 and SHCTBE56 exhibits the addition of bio epoxy polymer by sisal and hemp fibers attains progress to an improvement in the intensity of many wavenumbers like 1041, 1112, 1185, 1745, 2853, 2930, and 3325 cm −1 . As observed by another researcher, these wavenumbers are linked with lignin, hemicellulose, and cellulose, which are the primary components of sisal and hemp fibers 91 . Moreover, other functional groups in KHCTBE56, KSCTBE56, and KSHCTBE56 were chemically modified with the aerated functional groups of TiC nanofillers.…”
Section: Resultsmentioning
confidence: 69%
“…As observed by another researcher, these wavenumbers are linked with lignin, hemicellulose, and cellulose, which are the primary components of sisal and hemp fibers. 91 Moreover, other functional groups in KHCTBE56, KSCTBE56, and KSHCTBE56 were chemically modified with the aerated functional groups of TiC nanofillers. New peaks in these composites can present at 3450-3240 cm À1 and 1570 cm À1 , corresponding to N H and amine N H stretching.…”
In the present investigation, the chemically treated and untreated sisal/hemp fibers, fly ash or titanium carbide (TiC) nanofillers, and Kevlar fabrics reinforced bio epoxy (Sr 56) polymer matrix were manufactured using the wet layup method. Experimentation was performed to study the physical, mechanical and thermal properties. This investigation also includes determining the influence of accelerated weathering on the specimen surface for 5 months. The tensile fracture of the sample before and after the accelerated weathering from scanning electron microscope (SEM) pictures exhibited that the extensive failure principles in the laminates in terms of matrix cracking, fiber breakage, delamination, and fiber pull out. The thermal analysis examined the onset, endset temperature, transition loss, and carbon residue which were also reduced after the accelerated weathering. It exhibits that adding fly ash or TiC nanoparticles as an altered inhibitor against the weathering in the bio epoxy hybrid composite scheme can reduce the undesirable impacts from moisture and Ultra‐violet light exposure.Highlights
Sisal/hemp fibers were chemically treated to reduce hydrophilicity.
Contact angle of KSCHCTBE56 improved to 84.04°.
SEM confirmed uniform dispersion of fillers and enhance mechanical strength.
Mechanical and thermal characteristics reduced after accelerated weathering.
“…Composites are considered to be an exclusive class of materials, which can readily substitute metallic materials like steel and conventional wood-based materials owing to their cheap cost, abundant availability, high stiffness and strength and lightweight. [1][2][3] Polymer matrix composites finds their prime application in various fields of science and engineering like computer parts, automobile components, boats, missiles, airplanes, sports entities, spacecraft, and ship parts. [4][5][6][7] Natural fibers are considered to be the potential reinforcement materials for both thermosetting and thermoplastic polymers.…”
Current work aims to evaluate the effect of incorporating Tamarindus indica L.seed powder (TISP) and hybridization of hemp and jute natural fibers upon the characteristics of polymer nano-composites by varying the content (in weight percentage) of both the natural fibers. TISP filled hemp fibers (HF) and jute fibers (JF) reinforced polymer composites were manufactured via compression molding technique and mechanical properties such as flexural strength and modulus, tensile strength and modulus, porosity, hardness, impact strength, and inter-laminar shear strength (ILSS) were determined for the hybrid composites. Composites were also characterized by water absorption, Fourier transform infrared spectroscopy, and scanning electron microscopy analysis. Experimental results showcased that the tensile strength and modulus of the composites are 39.52 MPa and 2.648 GPa and the flexural strength and modulus values are of 89.62 MPa and 9.24 GPa respectively. The impact strength and ILSS values were found to be 2.35 J and 3.62 MPa. Composites containing 40 wt% JF and 10 wt% HF showcased reduced amount of void content because of the appreciable compatibility existed between matrix and the fibers.
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