EFFECT OF FIBRE TREATMENT ON LONGITUDINAL AND TRANSVERSE TENSILE PROPERTIES OF UNIDIRECTIONAL KENAF COMPOSITE

2015 ◽  
Vol 76 (11) ◽  
Author(s):  
Norhashidah Manap ◽  
Aidah Jumahat ◽  
Napisah Sapiai
Keyword(s):  
Tensile Properties ◽  
Strain Curve ◽  
Natural Fibre ◽  
Filament Winding ◽  
Fracture Mechanisms ◽  
Positive Effects ◽  
Transverse Tensile ◽  
Kenaf Fibre ◽  
Naoh Treatment ◽  
Kenaf Composites

Kenaf fibre has become one of the best candidates to be used as reinforcement material in polymer composite. However, the adhesion between natural fibre and polymer is weak due to different polarity of natural fibre and hydrophobic polymer. This affects the properties of the composite. One of the method to overcome this compatibility issue is by treating the fibre using sodium hydroxide (NaOH). This study is aimed to evaluate the effect of NaOH treatment on longitudinal and transverse tensile properties of kenaf composites using three different concentration (3, 5, and 7 wt. % NaOH). The kenaf composite test specimens were prepared using filament winding and vacuum bagging techniques. The 0o and 90o tensile tests were conducted in accordance to ASTM standard D3039 in order to obtain longitudinal and transverse tensile properties of treated and untreated kenaf composites. The fracture surfaces of the specimens were observed using scanning electron microscope in order to identify fracture mechanisms involved during tension. NaOH treatment on kenaf fibre resulted in a significant improvement in longitudinal tensile modulus, strength and failure strain. This also indicates an improvement in toughness property as this can be observed through a larger area under graph of tensile stress-strain curve. The SEM micrographs showed that the interfacial adhesion between kenaf fibre and epoxy matrix was improved when the kenaf fibre was treated using NaOH. Therefore, NaOH treatment give positive effects on longitudinal and transverse tensile properties of kenaf composites. Kenaf composite treated with 7wt% NaOH showed the highest tensile strength for both longitudinal and transverse fibre directions.

EFFECT OF NANOSILICA CONTENT ON LONGITUDINAL AND TRANSVERSE TENSILE PROPERTIES OF UNIDIRECTIONAL KENAF COMPOSITE

2015 ◽  
Vol 76 (11) ◽  
Author(s):  
Norhashidah Manap ◽  
Aidah Jumahat ◽  
Napisah Sapiai
Keyword(s):  
Tensile Properties ◽  
Tensile Modulus ◽  
Tensile Tests ◽  
Filament Winding ◽  
Fracture Mechanisms ◽  
Premature Failure ◽  
Pull Out ◽  
Transverse Tensile ◽  
Kenaf Fibre ◽  
Kenaf Composites

Nowadays, continuous natural fibre reinforced polymer nanocomposites have attracted substantial attention among researchers due to various benefits possesses by the natural fibres. Kenaf fibre has become one of the high potential candidates to replace synthetic fibres in polymer composite. Kenaf fibre exhibits good strength and modulus properties, low density, non-abrasive during processing and biodegradable. This study is aimed to evaluate the effect of nanosilica on longitudinal and transverse tensile properties of unidirectional (UD) kenaf composite. The UD kenaf composite samples were prepared based on three different nanosilica content; i.e. 5, 13 and 25 wt.%. The samples were prepared using filament winding and vacuum bagging techniques. The 0o and 90o tensile tests were conducted in accordance to ASTM standard D3039 in order to obtain longitudinal and transverse tensile properties of unmodified and nanosilica-modified kenaf composites. The fracture surfaces of the specimens were observed using scanning electron microscope in order to identify fracture mechanisms involved during tension. The results showed that the addition of nanosilica reduced longitudinal tensile Young’s modulus, strength and failure strain of the kenaf composite. SEM micrographs revealed incomplete resin wetting and  fibre pull-out mechanism at high nanosilica content that contributed to premature failure of the kenaf composites.  However, it was found that the addition of nanosilica improved transverse tensile properties of kenaf composites since these properties were mostly governed by the properties of the matrix. A stiffer matrix improved the transverse tensile modulus and strength of kenaf composites. 

Influence of Different Matrices on the Tensile and Impact Properties of Treated Kenaf Composites

2016 ◽  
Vol 1133 ◽  
pp. 136-140
Author(s):  
Noor Haznida Bakar ◽  
Koay Mei Hyie ◽  
A. Jumahat ◽  
Eli Nadia A. Latip ◽  
Anizah Kalam ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Tensile Properties ◽  
Testing Machine ◽  
Low Velocity ◽  
Impact Properties ◽  
Weight Percentage ◽  
Kenaf Fibre ◽  
Naoh Solution ◽  
Kenaf Composites ◽  
The Impact

This study investigated the mechanical behavior of the treated and untreated kenaf with different matrix resin (epoxy and polyester) using the tensile and low velocity test. The long kenaf fibre was treated with 6% of sodium hydroxide (NaOH) solution for twelve hours in room temperature. The tensile properties of composites at different weight percentage (10,15,20 and 25%) were studied by using Instron Universal Testing Machine according to the standard ASTM D638. Impact test was conducted using an instrumented drop tower device at 10J incident energy level according to the standard ASTM D3763. The results of the study indicated that the epoxy resin reinforced with treated kenaf fibre exhibited higher tensile properties. On the other hand, the impact properties of polyester resin reinforced with treated kenaf fibre show better matrix bonding compared to those with epoxy resin matrices.

Design of a Collagen/Silk Mechano-Compatible Composite Scaffold for the Vascular Tissue Engineering: Focus on Compliance

2007 ◽  
Vol 334-335 ◽  
pp. 1169-1172 ◽  
Author(s):  
Frédéric Couet ◽  
Navneeta Rajan ◽  
Simone Vesentini ◽  
D. Mantovani
Keyword(s):  
Mechanical Properties ◽  
Silk Fibroin ◽  
Vascular Tissue ◽  
Composite Scaffold ◽  
Collagen Gel ◽  
Element Model ◽  
Natural Fibre ◽  
Filament Winding ◽  
Laminate Theory

One of the merging methods to produce tissue-engineered vascular substitutes is to process scaffolds to direct the regeneration of vascular tissues. Collagen, as one of the main protein in the vascular extracellular matrix, is one of biopolymers that exhibits a major potential for scaffold technology. However, gels made from reconstituted collagen generally exhibit poor mechanical properties and limited manipulability. Therefore, adding a reinforcement to the scaffold to make the structure resist to the physiological constraints applied during the regeneration represents a valid alternative. Silk fibroin is an interesting reinforcing candidate being a mechanically strong natural fibre, susceptible to proteolytic degradation in vivo and showing acceptable biological performances. Therefore, the aim of this study was to develop a model of a composite scaffold obtained by controlling the filament geometry winding of silk fibroin in the collagen gel. A finite element model taking into account the orthotropic elasticity of arteries has been combined with classic laminate theory applied to the filament winding of a tubular vessel. The design of the small structure susceptible to scaffold the vascular tissue regeneration was optimised by mean of an evolutive algorithm with the imperative to mimic the experimentally measured mechanical properties (compliance) of a native artery.

scholarly journals Kenaf Fibre Reinforced Polypropylene Composites: Effect of Cyclic Immersion on Tensile Properties

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
W. H. Haniffah ◽  
S. M. Sapuan ◽  
K. Abdan ◽  
M. Khalid ◽  
M. Hasan ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Room Temperature ◽  
Tap Water ◽  
Tensile Modulus ◽  
Polypropylene Composites ◽  
Preliminary Results ◽  
Kenaf Fibre ◽  
The Difference ◽  
Number Of Cycles

This research studied the degradation of tensile properties of kenaf fibre reinforced polypropylene composites due to cyclic immersion into two different solutions, as well as comparison of the developed composites’ tensile properties under continuous and cyclic immersion. Composites with 40% and 60% fibre loadings were immersed in tap water and bleach for 4 cycles. Each cycle consisted of 3 days of immersion and 4 days of conditioning in room temperature (28°C and 55% humidity). The tensile strength and modulus of composites were affected by fibre composition, type of liquid of immersion, and number of cycles. The number of immersion cycles and conditioning caused degradation to tensile strength and modulus of kenaf fibre reinforced polypropylene composites. Continuous and cyclic immersion in bleach caused tensile strength of the composites to differ significantly whereas, for tensile modulus, the difference was insignificant in any immersion and fibre loadings. However, continuous immersion in the bleach reduced the tensile strength of composites more compared to cyclic immersion. These preliminary results suggest further evaluation of the suitability of kenaf fibre reinforced polypropylene composites for potential bathroom application where the composites will be exposed to water/liquid in cyclic manner due to discontinuous usage of bathroom.

Tensile Properties of Natural Fibre Reinforced Polymer Composite Foams: A Systematic Review

2021 ◽  
Vol 02 (01) ◽  
Author(s):  
NurFadhlin Sakina Jamil ◽  
◽  
Mazatusziha Ahmad ◽  
Ahmad Hakiim Jamaluddin ◽  
◽  
...  
Keyword(s):  
Systematic Review ◽  
Tensile Properties ◽  
Polymer Composite ◽  
Natural Fibre ◽  
Fibre Content ◽  
Composite Foam ◽  
Fibre Size ◽  
Reinforced Polymer ◽  
Composite Foams ◽  
Fibre Reinforced Polymer

Biodegradable foam packaging was chosen as an alternative food packaging material due to non-toxic and produced from renewable sources. Researchers has turned to incorporate natural fibre to enhance the mechanical properties of polymer composite foam. In this study, the objective is to identify the studies which investigated on the tensile properties of natural fiber incorporated polymer composite foam and analyzed the effect of natural fibre content and size on tensile properties. Further correlation between the natural fibre content and size on tensile properties of composite polymer foam was conducted. The studies on the natural fibre incorporated polymer composite was identify via PRISMA method. The effect of natural fibre content and natural fibre size on tensile properties of polymer composite foam were analyzed in terms of qualitative analysis via systematic review. This study employs systematic review method on the existing literature. This study has utilized supplementary databases such as SAGE Journals, ScienceDirect, Taylor & Francis, Emerald Insight, ERIC ProQuest, SpringerLink and IEEE Xplore to cater all the possible relevant literature for a comprehensive review. The systematic review method comprised of the steps that explain on the review process in the sequence of the (identification, screening, eligibility), data analysis and data abstraction. From the article used in this systematic review, most of the result shown the increased tensile properties on natural fibre reinforced polymer composite foams. The study by Texteira et al. (2014) shows that the softwood fibre with 33% of PLA loading has the highest elongation at break, and highest natural fibre size (2470 µm). While the study by Long et al. (2019) has the highest tensile strength with 30% of ABF fibre content. The composition of 20 wt% BF with 80 wt% PLA composites were concluded to have the optimum tensile properties

Tensile Properties of Pineapple Leaf Fibre Reinforced Unsaturated Polyester Composites

2014 ◽  
Vol 695 ◽  
pp. 159-162 ◽  
Author(s):  
Januar Parlaungan Siregar ◽  
Tezara Cionita ◽  
Dandi Bachtiar ◽  
Mohd Ruzaimi Mat Rejab
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Fiber Length ◽  
Interfacial Adhesion ◽  
Unsaturated Polyester ◽  
Fibre Length ◽  
Tensile Modulus ◽  
Natural Fibre ◽  
Fibre Content ◽  
Polyester Composites

In recent years natural fibres such as sisal, jute, kenaf, pineapple leaf and banana fibres appear to be the outstanding materials which come as the viable and abundant substitute for the expensive and non-renewable synthethic fibre. This paper investigate the effect of fibre length and fibre content on the tensile properties of pineapple leaf fibre (PALF) reinforced unsaturated polyester (UP) composites. PALF as reinforcement agent will be employed with UP to form composite material specimens. The various of fiber length (<0.5, 0.5–1, and 1-2 mm) and fibre content (0, 5, 10 and 15 % by volume) in UP composite have been studied. The fabrication of PALF/UP composites used hand lay-up process, and the specimens for tensile test prepared follow the ASTM D3039. The result obtained from this study show that the 1-2 mm fibre length has higher tensile strength (42 MPa) and tensile modulus (1344 MPa) values compared to fibre length of <0.5 mm (30 MPa and 981 MPa) and 0.5-1 mm (35.40 MPa and 1020 MPa) respectively. Meanwhile, for the effect of various fibre content in study has shown that the increase of fibre content has decreased in tensile strength dan tensile modulus of composites. The increase of fibre content due to poor interfacial bonding and poor wetting of the fibre by unsaturated polyster. The treatment of natural fibre are suggested in order to improve the interfacial adhesion between natural fibre and the unsaturated polyester.

Transverse Tensile Properties of a Nickel-based Third Generation Single Crystal Superalloy

2018 ◽  
Vol 47 (10) ◽  
pp. 2964-2969
Author(s):  
Yang Wanpeng ◽  
Li Jiarong ◽  
Liu Shizhong ◽  
Shi Zhenxue ◽  
Zhao Jinqian ◽  
...  
Keyword(s):  
Single Crystal ◽  
Tensile Properties ◽  
Single Crystal Superalloy ◽  
Third Generation ◽  
Transverse Tensile

Energy and Time Efficient Microwave Curing for CFRP Parts Manufactured by Filament Winding

2015 ◽  
Vol 825-826 ◽  
pp. 741-748
Author(s):  
Stefan Betz ◽  
Fabian Köster ◽  
Vasileios Ramopoulos
Keyword(s):  
New Technologies ◽  
Fibre Volume ◽  
Filament Winding ◽  
Current Status ◽  
Process Time ◽  
Process Technology ◽  
Volumetric Heating ◽  
Microwave Curing ◽  
Positive Effects ◽  
Time Reduction

Process time reduction and energy/cost savings are usually in the focus of production process improvements. New technologies provide possibilities to achieve significant enhancements for relevant operation figures.Curing cycle times for CFRP manufacturing depend on several requirements: Type of resin, requested glass transition temperature, used equipment and energy source as well as sample size, weight, fibre volume ratio, fibre orientation etc. Conventional methods are mostly based on heat conduction while microwaves offer a selective and volumetric heating of the samples. Process time reduction and energy saving are the positive effects of the microwave curing technology.This paper will give an overview of the current status of this process technology not only focussing on technical aspects but also covering the process and economic effects.This work has been performed under the German BMBF project 02PJ2131, FLAME under the program Energy Efficient Light Weight Construction.

scholarly journals Selection of Natural Fibre for Hybrid Laminated Composites Vehicle Spall Liners Using Analytical Hierarchy Process (AHP)

2014 ◽  
Vol 564 ◽  
pp. 400-405 ◽  
Author(s):  
R. Yahaya ◽  
S.M. Sapuan ◽  
Z. Leman ◽  
E.S. Zainudin
Keyword(s):  
Analytical Hierarchy Process ◽  
Laminated Composites ◽  
Low Cost ◽  
Natural Fibre ◽  
Natural Fibres ◽  
Variable Properties ◽  
Kenaf Fibre ◽  
Ballistic Protection ◽  
Hierarchy Process ◽  
Selection Of

Natural fibres with variable properties are found in many engineering applications because of its low cost and biodegradability .The selection of suitable fibres involves the evaluation of a number of alternatives based on certain criteria. The purpose of this study is to suggest the use of analytical hierarchy process (AHP) in the selection of natural fibres for hybrid laminated composites. It was found that the most suitable natural fibre to be used with Kevlar 29 in hybrid laminated composites is kenaf fibre. It is expected that this finding will significantly contribute to the development of hybrid laminated composites for vehicle ballistic protection.

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