The water absorption characteristic had an effect on the tensile properties of Kenaf fiber composites, and the The fiber derived from the outer fibrous bark is also known as bast fiber. Some examples are jute, hemp, flax, kenaf as follows: JUTE (aka Tossa): Tossa Jute (Corchorus clitoris) – Tossa jute fiber is The optimization results, obtained using the optimization part of Design‐Expert Software, showed that the most optimal tensile strength and tensile modulus were to be 32.70 MPa and 2,182.33 MPa, respectively; and achieved at 28.95 wt% of the kenaf fiber, fiber length of 6.22 mm and PP‐g‐MA content of 5 wt%. Moisture absorption behavior and its effect on the tensile properties of hybrid composites are also investigated. With addition of 10 wt% of unbleached kenaf fiber, the tensile strength of PLA decreased from 53.6 MPa to 38.5 MPa. tensile strength of kenaf fiber that modified at different alkali solution concentration and temperature. The volume fraction of fiber and thickness of a hybrid composite was fixed at 40 vol.% and 3mm, respectively. composites having high strength properties (Huda et al. A theoretical model for the analysis and design of Kenaf fiber reinforced concrete materials and structural beam elements was proposed and evaluated. The better performance was attributed to the addition of MAPP due to improvements in the wetting of the filler surface. To start with, both the tensile strength and tensile modulus of the unstitched and silk-fiber-stitched woven kenaf composites were studied. The physical-mechanical properties, such as color, tensile strength, and moisture regain (MR), are the main characteristics that influence the processing and performance on the final products from kenaf fiber. This paper investigates the influence of silica nanoparticles on the mechanical properties of a unidirectional (UD) kenaf fiber reinforced polymer (KFRP) and hybrid woven glass/UD kenaf fiber reinforced polymer (GKFRP) composites. Type of resin Density From the Tensile Test Results it is evident that all the specimens show appreciable improvement of mechanical properties. The bulk density of the fibers used was 1.2 g/cm3. Figure 4.2: Tensile modulus of composites with respect to fiber content.....25 Figure 4.3:Tensile strength of HDPE/kenaf with and without compatibilizer (w t.%).....27 Figure 4.4: Tensile modulus of HDPE/kenaf … Kenaf fibers have a tensile strength of 223–930 MPa and a modulus of 14.5–73 GPa, which are comparable to those of E-glass fibers that have a tensile strength of 1000 MPa and a … tensile strength before and a er the weathering test. These fibers have higher tensile strength than other fibers. However, the maximum strain and impact strength decreased with increased filler loading. with significantly improved tensile strength, ductili-ty, and toughness characteristics [12]. The first set of mechanical properties that were investigated in this study were the tensile strength, tensile modulus and elongation to break. fabric made from kenaf fibers woven into four different weave patterns. Kenaf has a single, straight and branchless stalk. 2008). Impact strength of kenaf/PF composite showed a trend of increase with increasing fiber … e results of tensile test show a reduction in tensile strength for POM/kenaf samples a er exposure forhours. Four different sequences were introduced in the current project including CCCCC, KKKKK, KCKCK, and CKCKC. Results show that the presence of Kenaf fiber in concrete improved the properties such as splitting tensile strength, flexural strength and ultimate load of beam. 5. Two composition of HDPE/woven kenaf fiber were used i.e. Table 1 Mechanical properties of kenaf fiber and resins. Therefore, this study investigates the effects of different surface treatment namely magnesium chloride (MgCl2) and sodium hydroxide (NaOH) on the properties of kenaf fiber for different molarities. The strain to failure increases from 1st day until 3rd week followed by a drastically drop at 4th week. Moreover, tensile and flexural strength and elastic moduli of the kenaf fiber-reinforced composites increased linearly up to a fiber content of 50%. Tensile strength (MPa) 70 60 50 40 30 20 10 0 neat PLA 10 20 % of fiber … The kenaf fibers used in this study were ob-tained from National Tobacco Board at Kelantan, Malaysia. Fibers are collected from the skin or bast surrounding the stem of their respective plant. The results revealed that the addition of 10wt % fly ash particles with natural fiber composites increased the tensile strength of composites while hybridization with glass fibers reduced the water absorption properties. Keywords: kenaf fiber; fibrous mortar; brickwork Abstract. The effect of the mechanical strength of the hybrid composties is investigated. Effect of various kenaf fiber content on tensile modulus. Kenaf bast fiber has superior flexural strength combined with its excellent tensile strength that makes it the material of Total fiber loading of the hybrid composites was 43 vol.%. The image for woven kenaf fiber sample is shown in Figure- 1. 2.1 Materials preparation . absorption, tensile strength and Young’ modulus were observed experimentally. Tensile modulus Temperature Duration Mean COV N. ([degrees]C) (hours) (GPa) (percent) 110 3 12.0 22 16 6 15.3 23 19 9 13.0 19 19 130 3 13.8 21 19 6 14.2 18 20 9 14.3 16 19 150 3 14.4 22 20 6 13.4 14 19 9 13.7 18 19 170 3 15.0 25 18 6 15.3 17 16 9 14.3 22 10 190 3 9.2 47 9 6 8.0 42 4 9 6.8 59 4 Tensile strength Temperature Duration Mean COV N. ([degrees]C) (hours) (MPa) (percent) 110 3 136.5 … Environmental awareness and depletion of petroleum resource issue have triggered an enormous interest in utilizing natural fiber as environmentally friendly and sustainable materials as an alternative to the existing material. Figure 3: Comparative Bar Chart of Tensile Strength of Various Composites. In the current project, Kenaf fiber (K) and carbon fiber (C) with epoxy resin were utilized to form carbon-kenaf hybrid composites using a vacuum infusion technique. 2011). Addition of fibers , up to 20%, in to the composites improves tensile strength, strain rate , percentage of Elongation, Youngs Modulus. Alkali concentration used was 3%, 6% and 9% for 3 hour at room temperature. Effect of various kenaf fiber content on flexural modulus. Effect of Fiber Loading on Tensile Properties The effect of fiber loading on the tensile strength of PLA/kenaf bast fiber composites is depicted in Figure 1. Abstract. A. El-Shekeil 1*, S. M. Sapuan1, A. Khalina 2, ... of COMP2 decreased the tensile strength and strain; however, it slightly increased the tensile modulus. Kenaf stalk is made up of an inner woody core and an outer fibrous bark surrounding the core. The reason for the use of different weave patterns is to reduce the crimp percentage as it may increase the tensile strength of the fabric. Description of kenaf fiber in composite panel. Type of resin Tensile strength (MPa) Young’s modulus (GPa) References Kenaf fiber 129 12.50 ASTM D3379-75 Epoxy 19.13 5.82 Polyester 14.02 2.61 Vinyl Ester 7.00 1.63 ASTM D3039 Table 2 Specifications of resins. Hence, the fibre The tensile, flexural strength, and hardness of the composites increased with increasing fiber loading up to 43 vol.% and decreased above this value for kenaf/PF composites. Recently, α-cellulose (single fiber with low lignin content) has been successfully derived from kenaf bast fibers and has demonstrated better tensile strength and stiffness, as well as thermal stability when added to PLA composites (Talib et al. 2. Kenaf spin yarns have metric count from 12,000 to 25,000.Fibres spun from kenaf … Effect of various kenaf fiber content on tensile strength. Tensile Strength of Woven Kenaf Reinforced High Density Polyethylene (HDPE) Composites . Figure 5. The weave patterns are Twill 4/4, Satin 8/3 and Basket 4/4, while Plain 1/1 is used as a benchmark for its tensile strength. Figure 3. Fig. In general, the mechanical properties of kenaf fiber are deteriorated after the moisture penetrates into the composite. In this study, the neat PLA was used as the reference sample. Kenaf fruits have been found useful in treating metabolic diseases such as atherosclerosis, liver disease, cancer and diabetes. Fiber processing is an important factor that affects the physical and mechanical properties of long kenaf fiber. Referring to the tensile strength, kenaf mat compos ite seems stronger. The woven kenaf fiber is divided into fiber pitch of 1 mm (X -type) and 5 mm (Y-type), fiber orientation of 0° and 45°. A % drop in tensile strength from to MPa can be observed from Figure .However,thehybridcompositeshowed % dropintensilestrengthfrom toMPa. However, it reduced Figure 4. The respective fiber mass for each layer of square (200 x 200 mm) sample is shown in Table-1. The unidirectional fiber-reinforced composites showed tensile and flexural strengths of 223MPa and 254MPa, respectively. Preliminary study on kenaf fibrous concrete found that kenaf fibre has good properties mainly to improve tensile and flexural strength of concrete. 1 Kenaf stem (a) and Kenaf fiber (b). In this study, three different nanosilica loadings, i.e., 5, 13 and 25 wt %, and untreated kenaf fiber yarns were used. Kenaf (Hibiscus Cannabinus L.) fibres are thermally and alkali treated to enhance the interfacial bond between the fibre-matrix, the mechanical properties of the fibre itself, the fibre-reinforced thermally activated alum sludge ash (AASA) and the nanosilica (NS) blended cementitious composites. The incorporation of 10 wt% of bleached fiber to BC composite still exhibited a low tensile strength with 42.9 MPa. Fiber processing is an important factor that affects the physical and mechanical properties of long kenaf fiber. This decrease is probably due to an insufficient amount of kenaf fiber to impart strength to the composite. 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