Kenaf Fiber Hybrid Research Articles

The Impact of Filler Made of Acacia Concinna Pods and Fiber Treatment on the Water Absorption Properties of Kenaf Fiber Hybrid Composites

The Impact of Filler Made of Acacia Concinna Pods and Fiber Treatment on the Water Absorption Properties of Kenaf Fiber Hybrid Composites

Mechanical and optimization studies of polyethylene/snail shell/ kenaf fiber hybrid bio composite

Polyethylene (PE) was coupled with less expense of particulate snail shell (PSS) and kenaf fibre (KF) in a polymeric matrix with an excellent strength-to-cost ratio following compressive molding at 180 °C and 0.2 MPa. The compounds are divided within three categories and labeled combination 2, 4, and 6. Every set consisted of a mixture of 5, 10, 15 also 20 % KF with 2, 4, and 6 % PSS, correspondingly. According to the findings, a mixture of 5 to 20 wt% kenaf fibre and 2, 4, and 6 weight %particulate snail shell was used to boost the hardness value. Combining 2 wt% particulate snail shell with 5 to 20 wt%, on the other hand, resulted in increased effect, compressive, flexural, and tensile strengths. When mixed with 5 and 10 % kenaf fibre, the 4-wt %particulate snail shell resulted in a consistent increase in effect, compressive, and flexural resistance. The addition of 15 and 20 wt% KF, on the other hand, resulted in a minor fall in the strength values. When 4 wt% PSS was blended by 30 wt% KF, the tensile strength reached its maximum. In contrast, when 10 wt %particulate snail shell was combined with 5, 10, 15, or 20 wt% KF, there was no substantial increase in the mechanical characteristics of the particulate snail shell /KF-bio-PE compound (with the exception of hardness) and siring strength decreased. The optimal blend for a hybrid bio-PE composite was a composite of 4 wt% particulate snail shell and 6 wt% KF, according to Taguchi optimization.

A review on kenaf fiber hybrid composites: Mechanical properties, potentials, and challenges in engineering applications

The developments of agricultural-based composites for structural applications such as in construction, aerospace, and automotive have gained tremendous interest from researchers due to the uniqueness of its behaviors. Among available agricultural fibers, kenaf fiber widely adopted as a reinforcement in polymer composites to form kenaf reinforced polymer matrix composites. The hybridization technique was introduced to enhance the mechanical performances of composite materials wherein two different types of reinforcements were employed to form a hybrid composite. Therefore, in this review paper, the investigations focus on the mechanical properties of kenaf hybrid composites as well as potentials and barriers of agricultural-based composites were discussed to provide a literature source for future research regarding this topic.

Investigation of the Kenaf fiber hybrid length on the properties of the cement-treated sandy soil

Abstract The current study investigated the effects of cement and Kenaf fiber (KF) on sandy soil, in terms of cement content and KF content and length as the assessment values. For this purpose, several tests, including unconfined compressive strength (UCS), splitting tensile strength (STS), and ultrasonic wave velocity (UWV), were carried out. In addition, alterations of the microstructural features evaluated through a scanning electron microscopy (SEM) analysis. In the tested samples, the effect of various contents of cement (i.e., 3, and 6%) and fibers (i.e., 0, 0.25, 0.5, and 0.75%) with lengths of 8 mm and 16 mm, on the physical and mechanical properties of the cemented sand, was investigated. Moreover, the effect of simultaneous application of 8 mm and 16 mm fibers, with the ratio of 50% (8 mm) + 50% (16 mm)—Hybrid—for all the mentioned fiber contents, was evaluated. The experimental results showed that by increasing cement content, the UCS, STS, energy absorption (EA) capacity, UWV, and brittle index increase. The inclusion of randomly distributed KF to the specimens not only decreases the brittle index, elasticity modulus, and UWV but also increases the UCS, STS, and EA capacity. Also, by growing up the KF length, the UCS and STS increase, whereas the elasticity modulus decreases. Moreover, by the application of the Hybrid mixing plan, apart from that the; UCS, STS, and EA capacity increased; and the brittle index decreased compared to the specimens with 8 mm fiber, the secant modulus at 50% of peak stress (E50) and UWV increase, in comparison to specimens containing 16 mm fibers.

Physical and flammability properties of kenaf and pineapple leaf fibre hybrid composites

Pineapple leaf fibre (PALF) was hybridized with kenaf fibre in order to achieve superior physical and flammability performance. The mixing effects of kenaf fibre and pineapple leaf fibre in phenolic composites are evaluated at various fibre ratios and investigated various physical properties such as density, void content water absorption, thickness swelling and flammability. Pure kenaf fibre composite showed lowest void content, water absorption and thickness swelling while pineapple leaf fibre revealed the opposite trend. After adding pineapple leaf fibre in kenaf composites, it absorbed more moisture and developed more void contents. Density of PALF composite was lower and kenaf fibre composite was highest but PALF/kenaf hybrid composite increased density with higher PALF. The flammability of hybrid composites were analysed by using UL-94 test method. Vertical and horizontal UL-94 test conducted to analyse fire resistance of composites from different angles. Phenolic resin is itself a fire resistant polymer and the percentage of polymer in all samples are fixed though ratios of both fibres pineapple leaf fibre and kenaf were change to analyse fire resistant of fibres and compatibility with polymers. The 70 % pineapple leaf fibre and 30 % kenaf fibre hybrid composites were very affective to improve the flammability of PALF/KF hybrid composites.

Investigation on mechanical properties of woven alovera/sisal/kenaf fibres and their hybrid composites

The go-green concept results in multipoint focus towards materials made from nature; easily decomposable and recyclable polymeric materials and their composites along with natural fibres ignited the manufacturing sectors to go for higher altitudes in engineering industries. This is due to the health hazard and environmental problems faced in manufacturing and disposal of synthetic fibres. This study was undertaken to analyse the suitability of new natural fibre as an alternative reinforcement for composite materials. In this paper, tensile, flexural and impact test is made for the woven alovera and kenaf (AK), sisal and kenaf (SK), alovera, sisal and kenaf fibre hybrid epoxy composites (ASK). The composite laminates are made through a hand-layup process. The surface analysis is studied through scanning electron microscopy. From the investigation the SK hybrid composite shows good tensile property, AK hybrid composite shows better flexural property and the best impact strength is observed for ASK hybrid composite. The natural fibres slowly replace the synthetic fibres from its environmental impact, marching towards a revolution in engineering materials.

Hybrid Kenaf Fibre Composite Plates for Potential Application in Shear Strengthening of Reinforced Concrete Structure

This paper presents the finding of an experimental study on kenaf fibre hybrid composite plates for potential application in shear strengthening of RC beam. In the experimental programme, hybrid composite plates had been fabricated using kenaf and carbon fibres with five different mixes i.e., 47% kenaf with 0% carbon; 45% kenaf with 2.5% carbon; 47% kenaf with 5% carbon; 45% kenaf with 7.5% carbon and 45% kenaf with 10% carbon. The physical and mechanical properties of the fabricated hybrid composite plates were then experimentally investigated. Results showed that carbon contents had an influence to enhance the tensile strength of the plates. Hybrid composite plate with 10% carbon content had shown 130% higher tensile strength as compared to that of plate without carbon fibre. The carbon content also had enhanced the modulus of elasticity of plates. Higher percentage of carbon had shown higher tensile strength and modulus of elasticity of hybrid composite plates. All fabricated plates had linear elastic properties under tension. The density of plates increased with the increasing of carbon content in composite plates. The research findings indicated that the developed hybrid composite kenaf could be used for shear strengthening of reinforced concrete beam.

Characterization and preparation of conductive exfoliated graphene nanoplatelets kenaf fibre hybrid polypropylene composites

Exfoliated graphene nanoplatelets (GNP) kenaf fiber (KF) hybrid polypropylene (PP) composites materials were prepared by melt extrusion followed by injection molding. PP/KF/MAPP/GNP composites 0–5phr were prepared and characterized using X-ray diffraction (XRD), differential scanning calorimetre (DSC), thermogravimetry analysis (TGA), heat deflection temperature (HDT), thermal mechanical analysis (TMA), Fourier transform infrared (FTIR) spectroscopy analysis, field emission scanning electron microscopy. The morphological studies revealed a homogenous dispersion of GNPs in PP/KF/MAPP/GNP up to 3phr loading after which agglomeration occurred. Flexural strength and modulus were enhanced by 70% and 98% respectively at 3phr GNPs loading which were the highest values obtained. Interestingly, the highest value for the impact strength was also recorded at 3phr loading. Thermal conductivity increased by 88%, CTE decreased by 80%, water absorption and thickness swelling decreased while HDT improved. The thermal stability of the composites were generally improved at all GNP loading with the highest at 3phr. From the overall results, it is obvious that the optimum concentration of GNPs in the PP/KF/MAPP/GNP system in terms of both mechanical and thermal properties was 3phr loading. Although, the mechanical and thermal properties of the composites were improved, the FTIR analysis did not reveal any chemical interaction between GNP and the PP/KF/MAPP system.

The Effect of Additives on Bending Strenght of Pultruded Hybrid Reinforced Resol Type Phenolic Composite

Pultrusion manufacturing process is a well established technique for the cost-effective production of high-modulus and lightweight composite materials having constant cross-sectional profiles. A study was carried out to analyze the effect of additives on bending strength of pultruded hybrid reinforced resol type phenolic composite. Glassfibre roving and kenaf fibre hybrid were reinforced in resol type phenolic. A series of bending tests were performed by varying the loading percentage of two type’s pultruded fibres,without additives and with additives. From the results, it was found that the modulus of strength of composites with additives display higher values as compared to composite without additives. The presence of additives were able to synergistically interact with both fibres and finally improve the interaction between them. Analysis of the fracture surface from the bending test were carried out using Dino-Lite digital microscope.

Mechanical properties and dynamic mechanical analysis of thermoplastic‐natural‐rubber‐reinforced short carbon fiber and kenaf fiber hybrid composites

AbstractThe hybridization of thermoplastic natural rubber based on carbon fiber (CF) and kenaf fiber (KF) was investigated for its mechanical and thermal properties. Hybrid composites were fabricated with a melt‐blending method in an internal mixer. Samples with overall fiber contents of 5, 10, 15, and 20 vol % were subjected to flexural testing, and samples with up to 30% fiber content were subjected to impact testing. For flexural testing, generally, the strength and modulus increased up to 15 vol % and then declined. However, for impact testing, higher fiber contents resulted in an increment in strength in both treated and untreated composites. Thermal analysis was carried out by means of dynamic mechanical analysis on composites with 15 vol % fiber content with fractions of CF to KF of 100/0, 70/30, 50/50, 30/70, and 0/100. Generally, the storage modulus, loss modulus, and tan δ for the untreated hybrid composite were more consistent and better than those of the treated hybrid composites. The glass‐transition temperature of the treated hybrid composite was slightly lower than that of the untreated composite, which indicated poor damping properties. A scanning electron micrograph of the fracture surface of the treated hybrid composite gave insight into the damping characteristics. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008