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RISS 인기검색어
- 검색키워드
- 저자 : M. Jawaid (검색결과 5 건)
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M. Nuzaimah,S. M. Sapuan,R. Nadlene,M. Jawaid 한국섬유공학회 2019 Fibers and polymers Vol.20 No.6
Recycling of waste rubber gloves is an alternative to sustainable methods in ensuring that waste rubber does notpile up. The main focus of this investigation is to evaluate the potential of utilising waste rubber gloves as fillers inunsaturated polyester-based composites. The evaluation also studies the effect of different loading of rubber content towardsthe composite’s mechanical properties with 8 different rubber contents being considered. Rubber contents of 5, 10, 15, 20, 25,30, 35 and 40 wt. % have been studied in this work. Waste rubber gloves were ground into crumbs using cryogenic grindingand added into the unsaturated polyester. The composite is characterised for its tensile and flexural strength, elastic modulus,impact strength and fracture surface morphology. The addition of rubber crumbs has increased the toughness of thecomposite while it decreased the tensile strength, flexural strength and elastic modulus. Due to rubber hydrophobicbehaviour, adhesion between rubber crumbs and polyester gets weaker as the rubber content was increased, therefore thetensile strength of the composite dropped. The SEM micrographs of the tensile fracture surface of the composite revealed thatvoids in the composite increases as the rubber content is increased. Voids occur due to inhomogeneous distribution of rubbercrumbs throughout the composite.
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A. M. Radzi,S. M. Sapuan,M. Jawaid,M. R. Mansor 한국섬유공학회 2019 Fibers and polymers Vol.20 No.4
The aim for this work is to investigate the effect of alkaline treatment on the mechanical, physical and thermalproperties of roselle (RF)/sugar palm fiber (SPF) reinforced thermoplastic polyurethane hybrid composites. RF/SPF hybridcomposites were fabricated at different NaOH concentrations (3 %, 6 % and 9 %) by melt mixing and compression molding. The mechanical, physical and thermal properties of RF/SPF hybrid composites were measured. The morphological propertiesof the tensile fractured sample were examined using scanning electron microscope. Obtained results indicated that the effectof NaOH treatment on the surface improved mechanical, physical and thermal properties accompanied by lower impactresistance. The highest tensile is 14.26 MPa, flexural strength is 14.05 MPa and impact strength is 23.76 kJ/M2) was obtainedfrom treatment 6 % NaOH concentration on RF/SPF hybrid composites. Adhesion bonding between fiber and matrix wasevident by using Scanning electron microscopy (SEM) micrograph of hybrid composite tensile fractured. Scanning electronmicrograph of tensile fractured surfaces of the NaOH treated RF/SPF hybrid composites revealed good adhesion bondingbetween fiber and matrix. Fourier transform infrared spectroscopy analysis was used to observe the effectiveness of NaOHtreatment in the removal impurities on fiber surfaces. Thermogravimetric analysis showed that the treated RF/SPF hybridcomposites had improved the thermal stability. Physical properties showed lower water uptake of the treated thermoplasticpolyurethane hybrid composites. The lowest water uptake is 7.97 % and thickness swelling is 6.49 % obtained from 9 %NaOH concentration after soaked in water for 7 days. Overall, the surface treatment on RF/SPF hybrid composite hasenhanced the composite properties and suitable for automotive part application; battery holder and bottom based.
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A.B.M. Supian,S. M. Sapuan,M. Jawaid,M. Y. M. Zuhri,R.A. Ilyas,A. Syamsir 한국섬유공학회 2022 Fibers and polymers Vol.23 No.1
The composite material in energy absorption tube application have gained a tremendous function as sacrificialstructure device in automotive, marine, and aerospace engineering. Due to capabilities of composite material inreinforcement structure, many researchers have explored to tailor the composite material properties to withstand into impactload condition. This present study of filament wound kenaf/glass hybrid composite tube was fabricated with three differentconfigurations of hybrid kenaf/glass fibre placement to obtained high capabilities of crashworthiness properties underintermediate-velocity impact load condition. Therefore, this present study has identified the hybridization technique of kenaf/glass fibre which tailored with various intraply stacking sequences parameter of filament winding technique to achieve betterimpact crashworthiness characteristic when compared with single synthetic glass composite fibre material. The arrangementof hybrid fibres in stacking sequence parameter has found that the hybrid specimen with high kenaf fibre fraction mass haveenhanced 68 % of energy absorbing value and the failure mode behaviour was more stable compare to synthetic glasscomposite tube specimen.
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J. Naveen,M. Jawaid,E. S. Zainudin,Mohamed T. H. Sultan,R. Yahaya 한국섬유공학회 2019 Fibers and polymers Vol.20 No.8
This research investigated the effect of hybridizing Kevlar/cocos nucifera sheath and the effect of adding differentwt.% of Graphene nanoplatelets (GNP) on the interlaminar shear behaviour of laminated composites. Initially, different wt.% (0,0.25, 0.50, and 0.75) of GNP’s were mixed with epoxy resin through Ultrasonic-sonication. Then the laminated compositeswere fabricated by hand lay-up method followed by hot pressing. The weight ratio of Kevlar (K) and cocous nucifera sheath(CS) are 100/0 (S1), 75/25(S2), 50/50 (S3), 25/75(S4), and 0/100(S5). Interlaminar shear strengths (ILSS) of differentlaminates were evaluated using a short beam shear test. The results revealed that hybrid composites S2 (75/25) possess higherILSS than other laminates in the absence of GNP. Addition of GNP at 0.25 wt.% exhibited higher ILSS in all the laminates(S1 to S5) due to the improved interfacial properties. Further addition of GNP (0.50, and 0.75 wt.%) has declined the ILSS ofthe laminated composites due to aggregation and overlapping of GNP. XRD analysis reveals that at 0.25 wt.% of GNP, all thehybrid composites exhibited higher crystallinity index. Statistical analysis of the results has been performed using one way-ANOVA (Analysis of variance) and it shows that there is a statistically significant difference between the obtainedinterlaminar shear strength of the laminated composites.
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A review on thermomechanical properties of polymers and fibers reinforced polymer composites
N. Saba,M. Jawaid 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.67 No.-
Polymer composites offered broad engineered applications, however their diversity get restricted owing to fluctuations in thermomechanical properties during heating or cooling hence great concern required prior their applications through thermomechanical analysis (TMA). Traditionally, TMA or dilatometry found to be simple, ideal, reliable, sensitive, excellent and basic thermal analytical technique. TMA provides valuable information on thermal expansion, glass transitions temperature (Tg), softening points, composition and phase changes on material of having different geometries simply by applying a constant force as a function of temperature. This compilation highlights the basics and experimental of TMA for both research and technical applications and also provide literature on TMA of polymers, hybrid composites, nanocomposites and their diverse applications.
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