scholarly journals Kenaf fibre treatment and its impact on the static, dynamic, hydrophobicity and barrier properties of sustainable polystyrene biocomposites

RSC Advances ◽  
2020 ◽  
Vol 10 (49) ◽  
pp. 29296-29305
Author(s):  
Hesham Moustafa ◽  
Abd El-Aziz A. El-Wakil ◽  
Mohamed T. Nour ◽  
Ahmed M. Youssef
Keyword(s):  
Fibre Surface ◽  
Barrier Properties ◽  
Natural Fibre ◽  
Polymer Adhesion ◽  
Kenaf Fibre ◽  
Fibre Treatment

Natural fibre-polymer adhesion can be improved by treating the fibre surface or polymer.

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.

The Effect of Compatibilising Agent and Surface Modification on the Physical Properties of Short Pineapple Leaf Fibre (Palf) Reinforced High Impact Polystyrene (Hips) Composites

2009 ◽  
Vol 17 (6) ◽  
pp. 379-384 ◽  
Author(s):  
J.P. Siregar ◽  
S. M. Sapuan ◽  
M.Z.A. Rahman ◽  
H.M.D.K. Zaman
Keyword(s):  
Surface Modification ◽  
Maleic Anhydride ◽  
Physical Properties ◽  
Alkali Treatment ◽  
Fibre Surface ◽  
Natural Fibre ◽  
High Impact ◽  
High Impact Polystyrene ◽  
Poly Ethylene

The aim of this study was to investigate the effects of compatibilising agent and surface modification of short pineapple leaf fibre on physical properties of short pineapple leaf fibre reinforced high impact polystyrene (HIPS) composites. The purpose of using the compatibilising agents in this study was to modify the HIPS which include the polystyrene-block-poly(ethylene-ran-butylene)-block-poly(styrene-graft-maleic anhydride) and poly(styrene-co-maleic anhydride). Meanwhile, the alkali treatment was also used to modify the natural fibre surface of short PALF. The results have shown that adding compatibilising agent has improved the physical properties of the composites more effectively than by only using alkali treatment to modify the natural fibre surface.

scholarly journals Natural Fibre-Reinforced Biofoams

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Anne Bergeret ◽  
Jean Charles Benezet
Keyword(s):  
Mechanical Properties ◽  
Cellulose Fibre ◽  
Fibre Surface ◽  
Natural Fibre ◽  
Void Content ◽  
Blowing Agent ◽  
Single Screw ◽  
Single Screw Extrusion ◽  
Density Reduction ◽  
Screw Extrusion

Starches and polylactic acids (PLAs) represent the main biobased and biodegradable polymers with potential industrial availability in the next decades for “bio” foams applications. This paper investigates the improvement of their morphology and properties through processing and materials parameters. Starch foams were obtained by melt extrusion in which water is used as blowing agent. The incorporation of natural fibres (hemp, cellulose, cotton linter, sugarcane, coconut) in the starch foam induced a density reduction up to 33%, a decrease in water absorption, and an increase in mechanical properties according to the fibre content and nature. PLA foams were obtained through single-screw extrusion using of a chemical blowing agent that decomposed at the PLA melting temperature. A void content of 48% for PLA and 25% for cellulose fibre-reinforced PLA foams and an improvement in mechanical properties were achieved. The influence of a fibre surface treatment was investigated for both foams.

scholarly journals Laccase-Enzyme Treated Flax Fibre for Use in Natural Fibre Epoxy Composites

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4529
Author(s):  
Hanna M. Brodowsky ◽  
Anne Hennig ◽  
Michael Thomas Müller ◽  
Anett Werner ◽  
Serge Zhandarov ◽  
...  
Keyword(s):  
Coupling Agent ◽  
Interfacial Strength ◽  
Fibre Surface ◽  
Tensile Tests ◽  
Single Fibre ◽  
Natural Fibre ◽  
Flax Fibre ◽  
Specific Strength ◽  
Flax Fibres ◽  
Afm Micrographs

Natural fibres have a high potential as reinforcement of polymer matrices, as they combine a high specific strength and modulus with sustainable production and reasonable prices. Modifying the fibre surface is a common method to increase the adhesion and thereby enhance the mechanical properties of composites. In this study, a novel sustainable surface treatment is presented: the fungal enzyme laccase was utilised with the aim of covalently binding the coupling agent dopamine to flax fibre surfaces. The goal is to improve the interfacial strength towards an epoxy matrix. SEM and AFM micrographs showed that the modification changes the surface morphology, indicating a deposition of dopamine on the surface. Fibre tensile tests, which were performed to check whether the fibre structure was damaged during the treatment, showed that no decrease in tensile strength or modulus occurred. Single fibre pullout tests showed a 30% increase in interfacial shear strength (IFSS) due to the laccase-mediated bonding of the coupling agent dopamine. These results demonstrate that a laccase + dopamine treatment modifies flax fibres sustainably and increases the interfacial strength towards epoxy.

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.

The Using Fungi Treatment as Green and Environmentally Process for Surface Modification of Natural Fibres

2014 ◽  
Vol 554 ◽  
pp. 116-122 ◽  
Author(s):  
Seyed Meysam Khoshnava ◽  
Raheleh Rostami ◽  
Mohammad Ismail ◽  
Alireza Valipour
Keyword(s):  
Surface Modification ◽  
Surface Treatment ◽  
Low Cost ◽  
Fibre Surface ◽  
Natural Fibre ◽  
Embodied Energy ◽  
Natural Fibres ◽  
Matrix Interface ◽  
Hydrophobic Polymer ◽  
Fibre Matrix

Although Natural Fibres have various potential and advantages such as lower in weight, embodied energy and toxicity but their drawbacks are provided relentless competition between natural and synthetics fibres. Intrinsically, Natural Fibres are hydrophilic that is leaded to poor resistance to moisture and incompatible to hydrophobic polymer matrix. This incompatibility of natural fibres results in poor fibre/matrix interface which in turn leads to reduce mechanical properties of the composites. This study try to litreature some methods of chemical treatment or surface modification of Natural Fibres for improving this drawback of natural fibres. The objective of this research is fungi treatment as Green Surface Treatment that is indicate to environmental friendlier process. The use of fungi can provide low cost, highly efficient and environmentally friendly alternatives to natural fibre surface treatment.

scholarly journals Water Absorption Properties of Kenaf/Glass Reinforced Unsaturated Polyester Composites used in Insulator Rods

2019 ◽  
Vol 9 (2) ◽  
pp. 4208-4212
Keyword(s):  
Water Absorption ◽  
Glass Fibre ◽  
Volume Fraction ◽  
Hybrid Composites ◽  
Fibre Composite ◽  
Unsaturated Polyester ◽  
Natural Fibre ◽  
Glass Fibres ◽  
Kenaf Fibre ◽  
Glass Fibre Composite

Kenaf fibres have acquired enormous attention in recent years, owing to their economic viability and environmental acceptability. Kenaf (natural) fibres have been started to replace the glass fibre (synthetic) in mechanical, electrical applications and have been utilized in several applications of industrial engineering. The current study deals with water absorption of kenaf/glass fibre reinforced unsaturated polyester composite materials used in high voltage polymeric insulator rods. The kenaf/glass hybrid composites were based on 20%, 30% and 40%(by volume) of kenaf fibers replacement glass fibres with modified 60 vol.% unsaturated polyester resins. The composites were immersedin distilled water at room temperature, and composites resistance to water absorption in terms of the rate of water absorption was determined.A considerable difference in the properties of water absorption of the hybrid composite was found demonstrating that the water absorption effect on the characteristics of insulator rods depends on the arrangement and volume fraction of kenaf fibre of the composite used. Based on the results obtained, a slight effect of water absorption on pure glass fibre composite (control) was observed. The addition of kenaf fibre on glass fibre composite rod increased the water absorption of the composite. It was shown that glass fibres surrounding kena ffibre reduced water absorption. Despite the fact that 40 vol.% of kenaf fibre composite had the highest natural fibre content, it showed the lowest water absorption because of its arrangement on all composite diameters, and also because of being surrounded by glass fibres. All of the materials reached equilibrium and ceased to absorb water after 300 hours

Effect of Alkaline Treatment on Tensile and Impact Strength of Kenaf/Kevlar Hybrid Composites

2015 ◽  
Vol 763 ◽  
pp. 3-8 ◽  
Author(s):  
Noor Haznida Bakar ◽  
Koay Mei Hyie ◽  
Aidah Jumahat ◽  
Anizah Kalam ◽  
Z. Salleh
Keyword(s):  
Hybrid Composite ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Fibre Surface ◽  
Alkaline Treatment ◽  
Morphological Examination ◽  
Impact Performance ◽  
Kenaf Fibre ◽  
The Matrix ◽  
Polyester Matrix

This study is about the hybrid composite which used the woven Kevlar, long Kenaf fibre, and unsaturated polyester as the matrix. It focused on the mechanical characterization and properties of hybrid composite. The hybrid composites were fabricated by treated and untreated kenaf fibre and Kevlar as reinforcement in unsaturated polyester matrix using hand lay-up process. Effect of 6wt% of sodium hydroxide (NaOH) on the hybrid composites were analyzed using X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) analysis. The tensile and impact performance of the samples were tested according to the standard ASTM D3039 and ASTM D3763, respectively. Based on scanning electron micrograph (SEM) morphological examination, it revealed that the interfacial adhesion between the fibre surface and polymer matrix were improved. The results proved that the alkaline treatment can help to improve the mechanical properties compared to the untreated kenaf fibre.

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