Top PDF A Study On Mechanical Properties Of Hybrid Kenaf/Kevlar Fibre Reinforced Thermoplastic Composites

A Study On Mechanical Properties Of Hybrid Kenaf/Kevlar Fibre Reinforced Thermoplastic Composites

A Study On Mechanical Properties Of Hybrid Kenaf/Kevlar Fibre Reinforced Thermoplastic Composites

iii ACKNOWLEDGEMENTS First of all, I would like to express my sincere gratitude to my supervisor Assoc. Prof. Dr. Sivakumar A/L Dhar Malingam from Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka for his support, encouragement and professional guidance during the entire period of final year project.

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Mechanical properties of pultruded Kenaf fibre-reinforced vinyl ester composites

Mechanical properties of pultruded Kenaf fibre-reinforced vinyl ester composites

In the name of Allah, the Most Gracious and the Most Merciful. Alhamdulillah, all praise to Allah for the strengths and His blessing in completing this thesis. First and foremost, I wish to express my special appreciation and thanks to Prof. Ir. Dr. Mohd Sapuan Salit, Chairman of the Supervisory Committee for his dedications and overwhelming guidance throughout the completion of the research. I am also very thankful to the members of the Supervisory Committee: Assoc. Prof. Dr. Edi Syams Zainudin and Dr. Che Nor Aiza Jaafar for your most valuable contributions and assistances in this research. I also wish to extend my deepest gratitude to Kementerian Pendidikan Malaysia for providing the opportunity and supports especially through the financial scholarship (MyPhD) in pursuing my doctoral study.
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The Impact Behaviour Of Hybrid Kenaf/Glass Fibre Reinforced Composites

The Impact Behaviour Of Hybrid Kenaf/Glass Fibre Reinforced Composites

In the past few decades, the use of fibre reinforced composites has been growing explosively. Generally, they are in lightweight, making them an ideal choice for many lightweight applications. However, natural fibre reinforced composites often suffer from a lack of toughness. Hence, hybridisation of synthetic fibres and natural fibres can improve most of the mechanical properties and environmental performance in terms of stiffness, strength, ultimate failure strain and impact resistance. The other advantages of hybrid fibre are that they are particularly with low fabrication cost and able to use in many applications.
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Mechanical Properties of Nonwoven Reinforced Thermoplastic Polyurethane Composites

Mechanical Properties of Nonwoven Reinforced Thermoplastic Polyurethane Composites

needling density, such a threshold was not reached in the current study, as is evident by the systematic increase in tensile strength with increasing punch density from 42 to 168 punches cm −2 . Note that this was not accompanied by a large increase in preform density (Figure 12). Fibres in parallel-laid nonwovens are preferentially oriented in the MD and the observed decrease in anisotropy, reflected by the MD:CD strength ratio in Figure 13, can be associated with local in-plane re-orientation and out-of-plane fibre reorientation of fibre segments as the punch density increases. The strain at break %, Figure 14, increased with increasing punch density. The higher level of entanglement may increase the normal force on the existing fibre to fibre cross-over points facilitating higher elongation of the fibre segments between bond points, and increased tensile strength.
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Mechanical Properties of Nonwoven Reinforced Thermoplastic Polyurethane Composites

Mechanical Properties of Nonwoven Reinforced Thermoplastic Polyurethane Composites

needling density, such a threshold was not reached in the current study, as is evident by the systematic increase in tensile strength with increasing punch density from 42 to 168 punches cm −2 . Note that this was not accompanied by a large increase in preform density (Figure 12). Fibres in parallel-laid nonwovens are preferentially oriented in the MD and the observed decrease in anisotropy, reflected by the MD:CD strength ratio in Figure 13, can be associated with local in-plane re-orientation and out-of-plane fibre reorientation of fibre segments as the punch density increases. The strain at break %, Figure 14, increased with increasing punch density. The higher level of entanglement may increase the normal force on the existing fibre to fibre cross-over points facilitating higher elongation of the fibre segments between bond points, and increased tensile strength.
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Mechanical Properties of Reinforced Banana Fibre / Bio Fibre Hybrid Polymer Composites on Review

Mechanical Properties of Reinforced Banana Fibre / Bio Fibre Hybrid Polymer Composites on Review

Keywords: Flexural properties, Natural fibers, Banana &Bio-fibres, Hybrid composites.etc. I. INTRODUCTION Banana is one of the rhizomatous plants and currently grown in 129 countries around the world. India is the largest producer of banana in the world with an estimated annual output of 13.5 million tons, of which 80% is generated from six states, namely, Tamilnadu, Maharashtra, Karnataka, Kerala, Andhra Pradesh and Gujarat. Annually about 1.5 million tons of dry banana fibres could be produced from the outer sheath of pseudo-stem. Different parts of banana trees serve different needs, including fruits as food sources, leaves as food wrapping, and stems for fiber and paper pulp. The abundant availability of natural fibre in India, has been investigated for their use in plastics, including banana fibre , sisal, coir, paper-mulberry, raphia, flax, hemp, jute, kenaf, ramie, papyrus, straw, wood fiber, oil palm, empty fruit bunch, rice husks, wheat, barley, cane (sugar and bamboo), grass reeds, water pennywort, kapok , pineapple leaf fiber and oats and those could be alternately used to reduce the cost of the composites and weight.
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Study of Mechanical Properties of Raffia Palm Fibre/Groundnut Shell Reinforced Epoxy Hybrid Composites

Study of Mechanical Properties of Raffia Palm Fibre/Groundnut Shell Reinforced Epoxy Hybrid Composites

This result explained that the incorporation of different natural fibres (instead of a synthetic and a natural fibre) as reinforcements is also a very practical ap- proach. In this work, epoxy based hybrid composites were produced with raffia palm fibre and ground nut shell particulate as the reinforcing materials. To reduce the effect of moisture absorption of natural fibres and improve mechanical proper- ties, the fibres were treated with 10% NaOH solution to improve the surface properties and provide better adhesion with the matrix. Alkaline treatment of cellulosic fibres with sodium hydroxide is a well-known method which has been employed to improve fibre-polymer matrix interfacial bonding [14]. This treat- ment reduces the hydrophilicity of the fibres and increases its hydrophobicity by the removal of natural fats and waxes from cellulosic fibre surfaces. The tensile, impact and flexural properties of the produced composite were studied.
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Study On Mechanical Properties And Morphology Of Banana-Glass Fibre Reinforced Polypropylene (PP) Hybrid Composites

Study On Mechanical Properties And Morphology Of Banana-Glass Fibre Reinforced Polypropylene (PP) Hybrid Composites

ABSTRACT The goal of our research was study about the mechanical properties and morphology of banana-glass fibre reinforced polypropylene hybrid composites. In this study, we choose the banana fibre as first material. This is because, banana trunk are the natural material and easy to get at any place in Malaysia and other place in the world.

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Thermal, mechanical, and physical properties of seaweed/sugar palm fibre reinforced thermoplastic sugar palm Starch/Agar hybrid composites

Thermal, mechanical, and physical properties of seaweed/sugar palm fibre reinforced thermoplastic sugar palm Starch/Agar hybrid composites

Fully bio-based hybrid composites derived from Sw, SPF and TPSA matrix were successfully prepared via melt mixing and hot pressing in this study. The experimental results revealed that Sw and SPF were compatible and increase in intermolecular hydrogen bonding was evident following their hybridization in the com- posites. Mechanical testing of the hybrid composites showed that the tensile and flexural properties were improved, and the impact resistance was reduced with the addition of SPF. Scanning elec- tron micrograph study of tensile fracture showed good fibre-matrix adhesion and efficient stress-transfer from matrix to fibre (fibre breakage). Improvement in water resistance of the hybrid compos- ites was evident in all tests, namely water absorption, thickness swelling, water solubility and moisture absorption. Soil burial results manifested that hybridization of Sw composites with SPF led to a slower biodegradation process due to higher hydropho- bicity of the fibre. Overall, hybridization of seaweed with SPF in TPSA improves the mechanical, thermal and physical properties of the composites, which widened the potential application of this biodegradable material.
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Mechanical strength and thermal stability of woven glass/kenaf fibre hybrid-reinforced nanoclay with epoxy composites

Mechanical strength and thermal stability of woven glass/kenaf fibre hybrid-reinforced nanoclay with epoxy composites

Flexural test revealed improved flexural strength and flexural modulus among treated kenaf composites. Impact test was conducted at two different energy levels of 15 J and 30 J. It was observed that composite dispersed with nanoclay is capable of sustaining both the loads. Morphology study through Field Emission Scanning Electron Microscope (FESEM) revealed the roughness on the surface of the fractured treated kenaf fibre.

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Effect of fibre orientations on the mechanical properties of kenaf–aramid hybrid composites for spall-liner application

Effect of fibre orientations on the mechanical properties of kenaf–aramid hybrid composites for spall-liner application

where T re is the percentage of thickness swelling, T t is the thickness at time t, and T 0 is the initial thickness at t = 0. 2.5. Mechanical testing of composites Tensile test was conducted to determine the stress–strain behaviour of Kevlarkenaf hybrid laminated composites. The test was carried out using Instron 33R 4484 testing machine based on ASTM D 3039 on samples with a size of 200 mm × 25 mm × actual thickness. A standard head displace- ment at a speed of 5 mm/min was applied. Flexural test was conducted by using 3-point loading using Instron 33R 4484 testing machine according to the ASTM D 790-03. The rectan- gular samples with dimensions of 100 mm × 20 mm were cut using a circular saw. The tests were conducted at a crosshead displacement rate of 5 mm/minute. For each test, three samples were tested at room temperature and average data were taken as a final result. For Charpy impact, the test samples are prepared and tested according to the ASTM D256. Five un-notched samples with dimensions of 80 mm × 10 mm × respective thickness from each composition were tested. The composite toughness was analysed and reported.
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Properties of sugar palm/glass fibre-reinforced thermoplastic polyurethane composites

Properties of sugar palm/glass fibre-reinforced thermoplastic polyurethane composites

1.2 Problem statement There are many advantages associated with the usage of natural fibres as the composite materials. Most natural fibre composites provide a healthier working condition than the synthetic fibre composites. The trimming, cutting, and mounting of synthetic fibre components produces dust in which causes skin irritation and respiratory diseases to human beings. Besides, natural fibres are less abrasive in nature compared to synthetic fibres. Therefore, natural fibres that offer good thermal and insulating properties are easily recyclable and biodegradable. However, natural fibre composites also have its own disadvantages such as low mechanical properties, low impact strength, poor moisture resistance, poor microbial and fire resistance, and low durability. In order to overcome these flaws, natural fibre can be combined with a stronger synthetic fibre in the same matrix to produce hybrid composites.
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Fabrication and Study of Mechanical Properties of Bamboo Fibre Reinforced Bio-Composites

Fabrication and Study of Mechanical Properties of Bamboo Fibre Reinforced Bio-Composites

A- Bamboo fiber reinforced polymer composites Natural fiber reinforced polymer composites have raised a great attention and interest among scientists and engineers in recent years due to the consideration of developing environmental friendly materials [29]. They are high specific strength and modulus materials, low priced, recyclable and are easily available. It is known that natural fibers are non-uniform with irregular cross sections which make their structures quite unique and much different with man-made fibers such as glass fibers, carbon fibers etc [24].Various researchers have worked on the natural fibers containing polyolefins, polystyrene, polyester and epoxy resins [17], [18]. Properties like low cost, light-weight, high specific strength, free from health hazard are the unique selling points of these composites. Though the presence of hydroxyl and other polar groups in the natural fibers leads to the weak interfacial bonding between the fibers and the hydrophobic polymers, these properties can be significantly improved by interfacial treatment [19]. Among the various natural fibers, bamboo fiber is a good candidate for use as natural fibers in composite materials. Jindal [16] has observed that tensile strength of bamboo-fiber reinforced plastic (BFRP) composite is comparatively equivalent to that of the mild steel, whereas their density is only 12% of that of the mild steel. Hence, the BFRP composites can be extremely useful in structural applications. Jain and Kumar [32] have investigated that a uniform strength can be achieved in all directions of the composites by using multidirectional orientation of fibers. Considerable interest has been generated in the manufacturing of thermoplastic composites due to their good fracture toughness and thermal stability [26]-[7], and [23]. With more stringent
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Mechanical properties and fracture toughness of polypropylene reinforced kenaf fibre and nanoclay composites / Nur Kamarliah Kamardin

Mechanical properties and fracture toughness of polypropylene reinforced kenaf fibre and nanoclay composites / Nur Kamarliah Kamardin

CHAPTER ONE INTRODUCTION 1.1 BACKGROUND TO THE STUDY The studies o f natural fibres have attracted many researchers, academicians and engineers to find their way into commercial applications especially in the automotive trade, aerospace industries, marine hardware, argicultural sectors and household appliances. There are many kinds o f natural fibres which are available in abundance , including kenaf, rice husk, sisal, banana, jute, coconut shell, flax, hemp, bamboo and oil palm. Fibres are most significant in the class o f composites reinforcement. They are able to transfer their load to matrix materials, thus significantly affecting the properties o f composite materials via load sharing between the matrix and fibres.
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Study On Mechanical Properties Of Eco-Friendly Kenaf Fibre Reinforced Metal Laminate Structure

Study On Mechanical Properties Of Eco-Friendly Kenaf Fibre Reinforced Metal Laminate Structure

vi ABSTRACT During the past decades, the increasing demand of high performance and lightweight materials has stimulated the development of alternative materials, namely Fibre Metal Laminate (FML) structures. FML is a sandwich structure which is formed by bonding the metallic layers with composite as core constituent by means of adhesive agent. In this study, the mechanical behaviour of FMLs with the core constituents of environmental friendly kenaf fibre reinforced polypropylene composites was studied.

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Mechanical, Morphological, Thermal, And Durability Properties Of Resin Transfer Moulded Kenaf Fibre Reinforced Unsaturated Polyester Composites

Mechanical, Morphological, Thermal, And Durability Properties Of Resin Transfer Moulded Kenaf Fibre Reinforced Unsaturated Polyester Composites

ii ACKNOWLEDGMENT Bismillaahirrahmaanirrahiim, First and foremost, I would like to express my special gratitude to my supervisor Prof. Dr. Zainal Arifin Mohd Ishak for his valuable advice, encouragement, and constant dedication during my period of study. A sincere thanks is accorded to my co-supervisor Prof. Madya Dr. Razaina Mat Taib for helpful discussions and insightful suggestions.

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Effects of Alkali Treatment on Mechanical Properties of Epoxy Composites Reinforced Kenaf Fibre using Compression Moulding Process

Effects of Alkali Treatment on Mechanical Properties of Epoxy Composites Reinforced Kenaf Fibre using Compression Moulding Process

Abstract-- Development of sustainable and renewable materials from natural resources, especially plant fibre, has drawn considerable attention instead of synthetic fibre due to environmental concerns. Thermoset reinforced natural filler composites still challenges in term of dispersion, distribution and interfacial bonding with polymer matrix. The aim of this study is to fabricate epoxy composite reinforced with kenaf fibre using a compression moulding technique. The composites were fabricated with different fibre loadings and various types of kenaf fibres (untreated and treated kenaf). The kenaf fibres were treatedwith a NaOH solution (6 wt%) at room temperature for 24 hours in order to remove the impurities from the surface. The effect of the alkali treatment on the properties of epoxy composite was investigated. Thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy were deployed to study the thermal behaviour of untreated and treated kenaf/epoxy composites. Results of the TGA show that the untreated kenaf starts to decompose earlier compared to the treated kenaf. Reinforcement of untreated and treated kenaf in composites produces robust properties in terms of strength and microstructure. The addition of kenaf increases flexural properties by 25.95% compared to pure epoxy composite.
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Development of reinforced thermoplastic elastomer with kenaf bast fibre for automotive component

Development of reinforced thermoplastic elastomer with kenaf bast fibre for automotive component

This paper compared mechanical properties of kenaf fibre (KF) composites in different matrix systems namely; thermoplastic natural rubber (TPNR) and polypropylene/ethylene- propylene-diene-monomer (PP/EPDM). Both composites were produced via melt blending method using Haake internal mixer, and then compression moulded. The ratio of thermoplastic:elastomer was 70:30 for both polymer blends. The composites were reinforced with 20% kenaf fibre by volume. In addition, maleic anhydride polypropylene (MAPP) was also added as a compatibilizer in the case of treated composite. From the tensile tests, it was found that the tensile strength for TPNR is about 12% higher than the PP/PPDM matrix system. However the present of KF and MAPP has significantly increased the tensile strength of the PP/EPDM composite by approximately 81% while only 55% increment attained in TPNR-KF-MAPP as compared to unreinforced TPNR. This shows that KF has imparted its strength to the PP/EPDM system with good interaction provided by the compatibilizer agent.
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Flexural properties of hybrid hydrophilic silica nanoparticles/kenaf 
		reinforced epoxy composites

Flexural properties of hybrid hydrophilic silica nanoparticles/kenaf reinforced epoxy composites

In the ecological point of view, kenaf (Hybiscuscannabinus L.) is an attractive choice for composite reinforcing as it is a crop with a rapid growth maturing in 5-6 months with height of 4-5 m [4]. Another favourable factor of cultivating kenaf is its high ability to fixate carbon dioxide at 1.4 times its own weight and its photosynthesis rate is three times than that of the usual plant [5]. An example of weaving pattern and hybridization effect on composite reinforcement is by comparing the mechanical properties of plain and twill woven hybrid banana and kenaf fibre reinforce polyester [3]. Hybrid kenaf/banana reinforced composite had the highest increase in tensile strength indicating that minimal stress was developed at the interface of the composite due to the distribution of load transfer along the fibre direction. One of the chemical treatments of natural fibre is alkalization. A research has been made to investigate the effect of alkali treatment on the flexural strength of unidirectional kenaf fibre reinforced epoxy (KFRE) by immersing the fibre into sodium hydroxide (NaOH) for 24
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Natural fibre-reinforced thermoplastic composites from woven-nonwoven textile preforms: mechanical and fire performance study

Natural fibre-reinforced thermoplastic composites from woven-nonwoven textile preforms: mechanical and fire performance study

This work has shown that woven-nonwoven technology can be used to prepare natural-synthetic fibrous preforms, the composites prepared from which had good mechanical properties. The mechanical properties though can be further improved by using fibre surface treatments and/or compatibilisers for better fibre-matrix adhesion, which will be focus of the future work. Natural fibre reinforcement also helped in reducing flammability of PP and PLA composites and particularly melt dripping of thermoplastic matrices. Among PP and PLA composites, PLA showed better tensile and flexural properties, while their impact properties were inferior to PP composites. PLA composites were also less flammable and produced lesser smoke compared to respective PP composites. Both jute and sisal composites however, had inferior mechanical and flammability properties than their glass counterparts. For their usage in automotive, marine, aerospace or construction sectors, they will have to pass commercial fire tests, for which some sort of flame retardant treatments are required.
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