Table 1 Mechanical properties of kenaf fiber and resins. 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 … From the Tensile Test Results it is evident that all the specimens show appreciable improvement of mechanical properties. 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. The strain to failure increases from 1st day until 3rd week followed by a drastically drop at 4th week. 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 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 … The effect of the mechanical strength of the hybrid composties is investigated. The percentage ratio of holocellulose content, and of bast and core kenaf fiber was investigated. Fiber processing is an important factor that affects the physical and mechanical properties of long kenaf fiber. absorption, tensile strength and Young’ modulus were observed experimentally. Fiber processing is an important factor that affects the physical and mechanical properties of long kenaf fiber. Kenaf fibre is a natural fibre from plant that has a potential usage as reinforcement material in cement and concrete. 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. Kenaf spin yarns have metric count from 12,000 to 25,000.Fibres spun from kenaf … Another treatment was immersion of kenaf fiber in 6% alkali concentration at 95oC. 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. 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. Textile industry applications: Kenaf Fiber is the thinnest and longest are used in the textile industry. Preliminary study on kenaf fibrous concrete found that kenaf fibre has good properties mainly to improve tensile and flexural strength of concrete. Figure 3. A % drop in tensile strength from to MPa can be observed from Figure .However,thehybridcompositeshowed % dropintensilestrengthfrom toMPa. 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. Kenaf has a single, straight and branchless stalk. Effect of various kenaf fiber content on tensile modulus. Two composition of HDPE/woven kenaf fiber were used i.e. Description of kenaf fiber in composite panel. Table-1. The first set of mechanical properties that were investigated in this study were the tensile strength, tensile modulus and elongation to break. Type of resin Density 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. The volume fraction of fiber and thickness of a hybrid composite was fixed at 40 vol.% and 3mm, respectively. Figure 3: Comparative Bar Chart of Tensile Strength of Various Composites. The kenaf fibers used in this study were ob-tained from National Tobacco Board at Kelantan, Malaysia. Effect of various kenaf fiber content on flexural modulus. with significantly improved tensile strength, ductili-ty, and toughness characteristics [12]. Morphology using scanning electron microscopy (SEM) and fourier transform infrared (FTIR) spectroscopy and tensile properties of kenaf fibers after different surface treatment are evaluated. fabric made from kenaf fibers woven into four different weave patterns. Keywords: kenaf fiber; fibrous mortar; brickwork Abstract. The water absorption characteristic had an effect on the tensile properties of Kenaf fiber composites, and the The optimum tensile strength, modulus and deflection temperature were found in the composites with the 40 wt% kenaf fiber fraction with an increase up to 80% and 170% compared to the pristine polypropylene with the values of (60.3 ± 4,3) MPa and (159.1 ± 1,8) °C respectively. tensile strength of kenaf fiber that modified at different alkali solution concentration and temperature. Influence of chemical treatment on the tensile properties of kenaf fiber reinforced thermoplastic polyurethane composite Y. Kenaf bast fiber has superior flexural strength combined with its excellent tensile strength that makes it the material of Abstract. 2008; Khalid et al. composites having high strength properties (Huda et al. Impact strength, microstructure, and water absorption properties of kenaf/polyethylene terephthalate (PET) fiber-reinforced polyoxymethylene (POM) hybrid composites - Volume 28 Issue 16 - Yakubu Dan-mallam, Mohamad Zaki Abdullah, Puteri Sri Megat Yosuff Hence, the fibre 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. Kenaf fruits have been found useful in treating metabolic diseases such as atherosclerosis, liver disease, cancer and diabetes. 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. Fibers are collected from the skin or bast surrounding the stem of their respective plant. e results of tensile test show a reduction in tensile strength for POM/kenaf samples a er exposure forhours. The bulk density of the fibers used was 1.2 g/cm3. The unidirectional fiber-reinforced composites showed tensile and flexural strengths of 223MPa and 254MPa, respectively. 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%. These fibers have higher tensile strength than other fibers. tensile strength before and a er the weathering test. 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. 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. However, the maximum strain and impact strength decreased with increased filler loading. However, it reduced In general, the mechanical properties of kenaf fiber are deteriorated after the moisture penetrates into the composite. Four different sequences were introduced in the current project including CCCCC, KKKKK, KCKCK, and CKCKC. 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 … Some examples are jute, hemp, flax, kenaf as follows: JUTE (aka Tossa): Tossa Jute (Corchorus clitoris) – Tossa jute fiber is Figure 5. The incorporation of the kenaf fiber into the TPNR matrix resulted in an improvement in the tensile strength and Young's modulus. The incorporation of 10 wt% of bleached fiber to BC composite still exhibited a low tensile strength with 42.9 MPa. Tensile Strength of Woven Kenaf Reinforced High Density Polyethylene (HDPE) Composites . With addition of 10 wt% of unbleached kenaf fiber, the tensile strength of PLA decreased from 53.6 MPa to 38.5 MPa. A theoretical model for the analysis and design of Kenaf fiber reinforced concrete materials and structural beam elements was proposed and evaluated. Moisture absorption behavior and its effect on the tensile properties of hybrid composites are also investigated. Impact strength of kenaf/PF composite showed a trend of increase with increasing fiber … ... 40/60 and 30/70 Weight fraction ratios and tensile strength of Jute - glass fiber reinforced polyester are evaluated. 2.1.1 Kenaf fiber. Kenaf stalk is made up of an inner woody core and an outer fibrous bark surrounding the core. 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. Experimental program. 5. Referring to the tensile strength, kenaf mat compos ite seems stronger. 90/10 and 80/20 to produce the composite materials using compression molding technique at processing temperature of 17 The s mples were underwent tensile test according to ASTM D638 standard. Moreover, tensile and flexural strength and elastic moduli of the kenaf fiber-reinforced composites increased linearly up to a fiber content of 50%. Total fiber loading of the hybrid composites was 43 vol.%. 2.1 Materials preparation . Fiber Density (g/cm 3) Tensile Strength (MPa) Tensile Modulus (GPa) Kenaf 1.45 930 53 Cotton 1.51 400 13 Sisal 1.50 510 22 E-glass 2.50 3500 70 Carbon 1.40 4000 240 2.2 HYBRID COMPOSITES Hybrid composites by definition are the process of incorporation of two or more reinforcements in a … Addition of fibers , up to 20%, in to the composites improves tensile strength, strain rate , percentage of Elongation, Youngs Modulus. 2011). 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°. In this study, the neat PLA was used as the reference sample. The fiber derived from the outer fibrous bark is also known as bast fiber. 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. Fig. Effect of various kenaf fiber content on tensile strength. 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. This decrease is probably due to an insufficient amount of kenaf fiber to impart strength to the composite. 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. Tensile strength (MPa) 70 60 50 40 30 20 10 0 neat PLA 10 20 % of fiber … To start with, both the tensile strength and tensile modulus of the unstitched and silk-fiber-stitched woven kenaf composites were studied. The better performance was attributed to the addition of MAPP due to improvements in the wetting of the filler surface. 2. Figure 4. Alkali concentration used was 3%, 6% and 9% for 3 hour at room temperature. The respective fiber mass for each layer of square (200 x 200 mm) sample is shown in Table-1. 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