Mechanical performance investigation of lignocellulosic coconut and pomegranate / LDPE biocomposite green materials (original) (raw)
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2021
The current trend in deteriorating mechanical performance of green polymeric-based materials has made it essential for designers to establish more reliable and sustainable bio-products. Here, the mechanical performance of Jordanian lignocellulosic olive fibers in polymeric-based composites has been methodically investigated. The outcomes of different reinforcement conditions on the desired mechanical performance of the olive leaf’s lignocellulosic fibers with low-density polyethylene (LDPE) composites have been examined, including the properties of tensile strength, tensile modulus, mechanical strain, impact strength, and the intensity per composite volume. This has been accomplished to determine the optimum reinforcement condition for the desired mechanical behavior as well as to establish the performance deterioration and enhancement trends of such bio-materials in a more consistent manner. The results signify that lignocellulosic olive fibers have exhibited various enhancements i...
BioResources
Wood flour (WF) of poplar, acid hydrolysis residue (AHR) of corn cob from xylose production, and cellulose fibers (CF) from bleached eucalyptus pulp were compared as functional fillers of lignocellulosic-plastic composites (LPC) in terms of tensile strength and thermal stability. WF showed a negative effect on tensile strength of LPC. AHR-filled LPC at 10% of filling level exhibited an improvement by 8.9%, whereas higher filling level led to a decrease of tensile strength due to poor interfacial compatibility, as revealed by SEM analysis. Remarkably, tensile strength achieved a maximum of 25.8 MPa for CF-filled LPC at 2.5% of filling level, which was an approximately 76.7% improvement compared to the control. Dependence of LPC thermal stability on chemical compositions of fillers was revealed. WF-filled LPC showed a lower onset decomposition temperature compared to the control due to the presence of xylan, while thermal stability of AHR-filled LPC was enhanced due to the presence of...
Polymer Testing, 2006
Using polypropylene as the matrix polymer and rice-husk flour and wood flour as the reinforcing filler, the tensile and Izod impact properties of lignocellulosic filler reinforced polypropylene bio-composites made with different extruding systems were examined by assessing their mechanical properties and the morphology of the fracture surfaces. The test samples were injection molded, in order to determine the mechanical and morphological properties of the bio-composites made with two different extruding systems and at different filler loadings. The tensile strength and modulus of the biocomposites fabricated using the twin-screw extruding system were improved as compared with those fabricated using the single-screw extruding system, due to the improved dispersion of the fillers in the composite. There was no difference in the Izod impact strength of the composites fabricated using the twin-screw and single-screw extruding systems, the similar impact strength of both samples with different extruding processes might be due to the fact that impact test is not discriminating enough to reveal the difference in dispersion status of the present composites. The SEM micrographs revealed well-dispersed fillers on the fracture surfaces of the test samples fabricated using a twin-screw extruding system. r
Composite Structures, 2007
The tensile and Izod impact strength properties of lignocellulosic filler reinforced polyethylene bio-composites, made using low-and high-density polyethylene as the matrix polymer, rice-husk flour and wood flour as the reinforcing filler and different compatibilizing agents, were examined by assessing their mechanical properties and the morphological characteristics of their fracture surfaces. Test samples made with two different compatibilizing agents were injection molded, in order to determine their mechanical and morphological properties. The tensile strengths of the bio-composites fabricated using maleated polyethylene as the compatibilizing agent were superior to those of the bio-composites fabricated using maleated polypropylene, due to the improved wetting of the former compatibilizing agent in the matrix polymer. Based on the results of the Izod impact strength tests, the bio-composites fabricated using maleated polyethylene as the compatibilizing agent were also toughened. The SEM micrographs revealed a certain number of pulled-out traces on the fracture surfaces of the test samples fabricated using maleated polypropylene as the compatibilizing agent, but no pulled-out traces and many broken fillers on the fracture surfaces of the test samples fabricated using maleated polyethylene as the compatibilizing agent, due to the stronger interfacial bonding.
In the current study different natural fillers like rice husk, wheat husk and wood flour natural fillers were compounded with polypropylene to form composites. The effects of these natural fibres on various mechanical properties of the composites were investigated. Polypropylene composites at various filler loadings were compounded using a twin screw extruder and the test specimens were molded through injection machines.
Journal of Wuhan University of Technology, 2018
The presents preparation and characterization of different types of lignocellulosic fillers (pine wood sawdust/ walnut shell flour/ black rice husk powder) reinforced polypropylene composites were presented. The effect of MAPP as coupling agent (4wt%) on the physical and mechanical properties was also investigated. Polypropylene composites were prepared at different rates of filler/matrix (wt%) by using extrusion (for melt blending) and hot compression molding process. Maximum values of tensile and flexural strength were obtained as 26.1 and 43.4 MPa, respectively, whereas the elongation at break value was 4.11% at 10% pine wood sawdust reinforced PP. Tensile and flexural modulus of composites reached the maximum values as 3855 and 3633 MPa with the composite of 30% walnut shell flour reinforced PP. Characterization of composites was carried out by using tensile test, flexural test, FT-IR, and SEM.
MECHANICAL PERFORMANCE OF GREEN COCONUT FIBER/HDPE COMPOSITES
Many of our morden technologies demand materials with unusual combination of properties such as high strength to weight ratio, high stiffness, high corrosion resistance, high fatigue strength, high dimensional stability etc., these can't be met by conventional metal alloys. Composites consists of two phases namely fiber and matrix. Fibers are dis-continuous phase used to carry the load and matrix is continuous phase used to bind and transmit the load to the fibers. Fibers are produced with various materials such as metals, Glass, carbon and aramid etc. The present work includes the processing, characterization of green coconut fiber reinforced HDPE composites. An investigation is carried out to evaluate the Mechanical properties such as Tensile strength by adopting Taghuchi's Design of Experiments (DoE) L 9 orthogonal array concept. This investigation was set to analyze and develop a mathematical model using response surface methodology (RSM) for the observed responses i.e, Tensile strength (TS). The developed models were checked for their adequacy and significance of all the terms included in the models.
Polimeros, 2005
In order to avoid agglomeration and improve interaction of Cloisite® Na + (MMT) montmorillonite with a polyester matrix, a chemical modification of MMT with compatible silanes (VTES and MPS) was performed and the mechanical and morphological results were compared with nanocomposites prepared from commercial clays (Cloisite® 30B and Cloisite® 15A). The results showed similar flexural strength, higher modulus and improved interaction with the polyester resin for those nanocomposites prepared from silane-modified clays. However, organomodified clays showed better dispersion (tendency to exfoliation) and higher impact resistance.
Mechanical and Morphological Properties of Kenaf Cellulose/LDPE Biocomposites
American-Eurasian Journal of Agricultural and Environmental Science, 2009
The possibility of using cellulose from the cell walls of kenaf, an annual herbaceous crop, for the production of bicomposites was investigated in this study. The composites were prepared using LDPE, as a matrix, the extracted cellulose, as filler and PEG as a plasticizer. The characterization of biocomposites was then performed with optimized thermo-mechanical properties and propensity to environmental degradation. This paper focuses only on the mechanical properties including tensile strength, flexural and Izod impact tests. The results showed that the mechanical properties of the composites was decreased slightly as the cellulose content increased from 0 to 50 wt % in the biocomposite formulation. It is interesting to note that in all treatments, the mechanical behavior of biocomposites retained in an acceptable level of strength. These findings were confirmed by the SEM study. Consequently, the suitable bicomposite material for food packaging was successfully obtained. Abbreviat...
This research work developed and evaluated the mechanical properties of coconut fibre reinforced low density polyethylene (LPDE) composite material. The effect of fibre loading on the mechanical properties: tensile, flexural, and impact of the developed composite material have been investigated. Also carried out was the effect of fibre loading on the water absorptivity of the developed material. Sample categories of the developed composite were prepared by varying the fibre contents by weight at 0%, 10%, 20%, and 30%. The aim is to reduce the excessive waste disposal of LDPE materials that are largely found in the form of disposed water package materials (or pure water sachets) that usually affects the environment in the form of pollution. The water retting process was applied in extracting and cleaning fibre (or coir), while the mixed coir-LDPE (or developed composite material) was prepared by Compression Moulding Technique (CMT). The tensile and flexural properties were tested using Hounsfield Monsanto Tensometer (type w) while the impact properties were tested using the Charpy Impact testing machine. The microstructure of the composite was investigated using Scanning Electron Microscopy (SEM). The fractured surface morphology of the composite samples indicated a homogeneous mixture of the coir fibre and LDPE matrix. However, weak interfacial bonding between the coir fibre and LDPE matrix was also observed. The analysis of the water absorptivity showed that the developed composite materials have low water absorptivity at low fibre loading. However, at higher fibre loading, the water absorptivity increases significantly.