Abstract:This research aims to analyze the newly discovered cellulosic ber from the bark of Dittrichia viscosa, or Inula viscosa (IV), and evaluate the effects of permanganate and alkali chemical treatments on the physical properties to improve the interfacial bonding between Inula viscosa reinforced polymer composites. These permanganate and alkali treatments are both e cacious in helping in reducing hydrophilicity and eliminating impurities from the ber surface, which has been con rmed by scanning electron microscope… Show more
“…Table 6 shows the comparison of IFSS shear stress results for CM fibers with other fibers. We can say that the results obtained are close compared to the results of previous studies such as, Inula viscosa fibers, 48 Pineapple fibers, 49 Glass fibers, 50 Kevla fibers, 51 basalt fibers, 52 Glass fibers, 53 Agave sisalana fibers . 54 Figure 10.Force–displacement curve for droplet debonding.…”
Section: Resultssupporting
confidence: 86%
“…There are many factors that cause this discrepancy, among which are the increase in the roughness and surface area of the fibers, the length of the immersed resin and the different diameters of the fibers, which leads to the effect of mechanical cross linking between the fibers and the composite matrix. 48 The average IFSS for fiber-epoxy matrix combination is 9.82 ± 2.35 MPa. Table 6 shows the comparison of IFSS shear stress results for CM fibers with other fibers.…”
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.
“…Table 6 shows the comparison of IFSS shear stress results for CM fibers with other fibers. We can say that the results obtained are close compared to the results of previous studies such as, Inula viscosa fibers, 48 Pineapple fibers, 49 Glass fibers, 50 Kevla fibers, 51 basalt fibers, 52 Glass fibers, 53 Agave sisalana fibers . 54 Figure 10.Force–displacement curve for droplet debonding.…”
Section: Resultssupporting
confidence: 86%
“…There are many factors that cause this discrepancy, among which are the increase in the roughness and surface area of the fibers, the length of the immersed resin and the different diameters of the fibers, which leads to the effect of mechanical cross linking between the fibers and the composite matrix. 48 The average IFSS for fiber-epoxy matrix combination is 9.82 ± 2.35 MPa. Table 6 shows the comparison of IFSS shear stress results for CM fibers with other fibers.…”
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.
“…MAF and other cellulosic fibers possess an elevated amount of C and O component than other elements. [ 59 ] Apart from carbon and oxygen, Mg, Al, P, S, K, and Ca are also seen in Figure 5 and Table 3. These additional elements suggested the presence of pollution and non‐crystalline components on the MAF.…”
Section: Results and Discussion On Characterization Of Mafmentioning
This research investigated the scope of using a fiber harvested from Mucuna atropurpurea (MAF) plant as reinforcement in fiber-reinforced plastics. An optical microscope and a pycnometer were used to calculate the diameter (289 ± 21 μm) and density (1082 ± 29 kg/m 3 ) of the MAF. Using chemical compositional analysis, 58.74 ± 5.74 wt% cellulose and 16.31 ± 3.21 wt% hemicellulose, and 14.22 ± 3.36 wt% lignin and 0.38 ± 0.08 wt% wax components were found in the MAF. Numerous chemical stretching in the MAF were checked using Fourier transform infrared spectroscopy. Briodo analysis (68.08 kJ/mol) showed the kinetic activation energy of the MAF. Surface morphological inspections suggested surface treatments of MAF due to contaminations and wax on the fiber surface. The statistical analysis conducted for determining the tensile properties of MAF revealed that MAF is a suitable candidate to produce fiber-reinforced plastics. Characterization of MAF-reinforced polyester composites showed that 40 mm fiber length and 30 wt% fiber enhanced tensile strength (109.51 ± 2.1 MPa), flexural strength (156.62 ± 3.1 MPa), and hardness (94 ± 4 HRRW). Fractography images of composites with fiber pull-outs in the MAF-reinforced plastics were taken for analysis. Less cavities and voids in the 30 wt% MAF-reinforced composites were found along with reduced water absorption.
“…The large band observed between 3600-3000 cm À1 is associated with the hydrogen bonded O-H (Hydroxyl group) stretching vibration from the cellulose structure of MS. 14,59 The absorption peaks at 2912 cm À1 and 2873 cm À1 are the characteristic of the C-H stretching vibration from CH and CH 2 group respectively. 23 Whilst the absorbance band located at 1733 cm À1 is a consequence of the stretching vibration of the (C = O) carbonyl groups of hemicellulose, lignin and extractives. 19,22,60 The peak at 1625 cm À1 is attributed to the C = C stretching of the a Alkenes groups of lignin.…”
Section: Atr-ftir Analysismentioning
confidence: 99%
“…Therefore, a very large amount of research on the characterization of new fibers has been established. These new fibers were extracted from the leaf, 14,15 the stem, [19][20][21] the bark, [22][23][24] the fruits 25,26 or from the roots of a plant. [27][28][29] To our knowledge, there is unfortunately no study yet on the characterization of physical, chemical and mechanical properties of Malva sylvestris fibers.…”
The main goal of this study is to characterize natural lignocellulosic fibers extracted from Malva Sylvestris. The experimental approach used is consisted to analyze the morphological, physical, chemical, thermal and mechanical characteristics of Malva sylvistris fibers. The stem anatomy showed that the bark of Malva is rich in fiber cells. Based on ATR-FTIR and X-ray analysis, the obtained results illustrated that the fiber contained mainly cellulose, hemicellulose and lignin. The crystallinity index of fiber is about 55.12 %, which indicated a high cellulose content. The Thermo-gravimetric analysis (TGA) analysis test point out that Malva Sylvestris fibers are thermally stable until 225°C and an apparent activation energy about of 111 kJ.mol−1 was recorded. Tensile strength of Malva fibers is about of 236.64 ± 93.33 MPa whilst its young’s modulus is about of 26.07 ± 5.14 GPa. In view of the dispersion in the obtained experimental results, the latter were analyzed using the Weibull statistical laws with two parameters.
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