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A. Shalwan - One of the best experts on this subject based on the ideXlab platform.
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Correlation between Mechanical Properties with Specific Wear Rate and the Coefficient of Friction of Graphite/Epoxy Composites
Materials, 2015Co-Authors: S. Alajmi, A. ShalwanAbstract:The correlation between the mechanical properties of Fillers/Epoxy Composites and their tribological behavior was investigated. Tensile, hardness, wear, and friction tests were conducted for Neat Epoxy (NE), Graphite/Epoxy Composites (GE), and Data Palm Fiber/Epoxy with or without Graphite Composites (GFE and FE). The correlation was made between the tensile strength, the modulus of elasticity, elongation at the break, and the hardness, as an individual or a combined factor, with the specific wear rate (SWR) and coefficient of friction (COF) of Composites. In general, graphite as an additive to Polymeric Composite has had an eclectic effect on mechanical properties, whereas it has led to a positive effect on tribological properties, whilst date palm fibers (DPFs), as reinforcement for Polymeric Composite, promoted a mechanical performance with a slight improvement to the tribological performance. Statistically, this study reveals that there is no strong confirmation of any marked correlation between the mechanical and the specific wear rate of filler/Epoxy Composites. There is, however, a remarkable correlation between the mechanical properties and the friction coefficient of filler/Epoxy Composites.
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correlation between mechanical properties with specific wear rate and the coefficient of friction of graphite epoxy Composites
Materials, 2015Co-Authors: Mahdi S Alajmi, A. ShalwanAbstract:The correlation between the mechanical properties of Fillers/Epoxy Composites and their tribological behavior was investigated. Tensile, hardness, wear, and friction tests were conducted for Neat Epoxy (NE), Graphite/Epoxy Composites (GE), and Data Palm Fiber/Epoxy with or without Graphite Composites (GFE and FE). The correlation was made between the tensile strength, the modulus of elasticity, elongation at the break, and the hardness, as an individual or a combined factor, with the specific wear rate (SWR) and coefficient of friction (COF) of Composites. In general, graphite as an additive to Polymeric Composite has had an eclectic effect on mechanical properties, whereas it has led to a positive effect on tribological properties, whilst date palm fibers (DPFs), as reinforcement for Polymeric Composite, promoted a mechanical performance with a slight improvement to the tribological performance. Statistically, this study reveals that there is no strong confirmation of any marked correlation between the mechanical and the specific wear rate of filler/Epoxy Composites. There is, however, a remarkable correlation between the mechanical properties and the friction coefficient of filler/Epoxy Composites.
I.s. Yahia - One of the best experts on this subject based on the ideXlab platform.
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design of smart optical sensor using polyvinyl alcohol fluorescein sodium salt laser filters and optical limiting effect
Journal of Molecular Structure, 2018Co-Authors: I.s. Yahia, A. Bouzidi, H.y. Zahran, W. Jilani, S. AlfaifyAbstract:Abstract Pure poly (vinyl alcohol) (PVA) and PVA doped Fluorescein-Sodium salt (FSS/PVA Composite films) have synthesized on wide scale laser optical filters. The investigated Polymeric Composite films have been characterized using several methods. The XRD patterns exhibit a decrease of the average crystalline size and an increase of the internal strain, which explained the imperfection and distortion in the prepared films. The optical characterizations showed a decrease in the transmission of the incident light for different samples, which may be explained to the layer formed by intermolecular hydrogen bonding between the PVA matrix and the FSS particles. The FSS/PVA Polymeric Composite films are being a completely blocking in the UV–Vis light at the range between 190 and 560 nm, agreement with the optical limiting effect, which makes the Composite films suitable for CUT-OFF laser filters applications. The decrease in its, directly and indirectly, allowed transition band gaps were controlled by the added FSS dyes molecules. The variation of the exponent frequency (s) of the power law for FSS/PVA Polymeric Composite films has been characterized to improve the hopping conduction mechanism in the materials. The dielectric permittivity (e′) and dielectric loss (e’’) have been decreased with increasing the applied frequency, and the incorporated FSS molecules due to the DC electric conductivity can cause the decreases of the polarization of the as-prepared films over the studied ranges.
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Design of smart optical sensor using polyvinyl alcohol/Fluorescein sodium salt: Laser filters and optical limiting effect
Journal of Molecular Structure, 2018Co-Authors: I.s. Yahia, A. Bouzidi, H.y. Zahran, W. Jilani, S. Alfaify, Hamed Algarni, Hajer GuermaziAbstract:Abstract Pure poly (vinyl alcohol) (PVA) and PVA doped Fluorescein-Sodium salt (FSS/PVA Composite films) have synthesized on wide scale laser optical filters. The investigated Polymeric Composite films have been characterized using several methods. The XRD patterns exhibit a decrease of the average crystalline size and an increase of the internal strain, which explained the imperfection and distortion in the prepared films. The optical characterizations showed a decrease in the transmission of the incident light for different samples, which may be explained to the layer formed by intermolecular hydrogen bonding between the PVA matrix and the FSS particles. The FSS/PVA Polymeric Composite films are being a completely blocking in the UV–Vis light at the range between 190 and 560 nm, agreement with the optical limiting effect, which makes the Composite films suitable for CUT-OFF laser filters applications. The decrease in its, directly and indirectly, allowed transition band gaps were controlled by the added FSS dyes molecules. The variation of the exponent frequency (s) of the power law for FSS/PVA Polymeric Composite films has been characterized to improve the hopping conduction mechanism in the materials. The dielectric permittivity (e′) and dielectric loss (e’’) have been decreased with increasing the applied frequency, and the incorporated FSS molecules due to the DC electric conductivity can cause the decreases of the polarization of the as-prepared films over the studied ranges.
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synthesis and characterization of wide scale uv vis cut off laser filter using methyl violet 6b pmma Polymeric Composite films
Sensors and Actuators A-physical, 2018Co-Authors: I.s. Yahia, S. Alfaify, Sherif M A S Keshk, A M Elnaggar, M M AbutalibAbstract:Abstract Poly(methyl methacrylate) (PMMA) doped with different weight percent of methyl violet-6B (MV-6B) as Polymeric films were prepared by a casting method. Different concentrations of MV-6B can affect both the crystal structure and optical properties of PMMA. The broad hump diffraction peaks present in PMMA at 2θ = 15.27°, 30.60°, and 40.69° are ascribed to amorphous PMMA. During the incorporation of MV-6B dye onto PMMA, the intense peaks of PMMA at the 2θ value of 15.27° and 30.6° became less intense, and d -spacing was changed. The X-ray results confirmed the strong electrostatic interaction of the cationic MV-6B dye with the anionic PMMA polymer. Furthermore, the transmittance of PMMA/MV-6B Composites is decreased with the increase of MV-6B dopants concentrations onto the PMMA matrix; this may be attributed to the electrostatic interaction between the PMMA chains and the molecules of methyl violet-6B. MV-6B-doped PMMA possesses three distinct band gaps corresponding to the pure PMMA, and other two band gaps are for the MV-6B /PMMA Composite films. PMMA/MV films with 3.333 wt% of MV-6B) showed a large scale CUT-OFF laser filter inside in the range from 190 to 670 nm. Our designed filter is a unique Polymeric Composite film for optoelectronic and laser applications.
Indrapal Karbhal - One of the best experts on this subject based on the ideXlab platform.
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impact of rare earth metal oxide eu2o3 on the electrochemical properties of a polypyrrole cuo Polymeric Composite for supercapacitor applications
RSC Advances, 2017Co-Authors: Mandira Majumder, Ram Bilash Choudhary, Anukul K Thakur, Indrapal KarbhalAbstract:A ternary Composite of polypyrrole/copper oxide/europium oxide (PPY/CuO/Eu2O3), synthesized via a facile in situ chemical oxidative polymerization method, exhibits the maximum specific capacitance of 320 F g−1 at the current density of 1 A g−1. Incorporation of the rare-earth metal oxide Eu2O3 in the PPY/CuO matrix can promote charge transportation in the resulting ternary nanoComposite by enhancing the porosity. The interconnected mesoporous networks reduce the internal resistance and the charge transfer resistance (Rct) of the Composite electrode material. Moreover, the incorporation of Eu2O3 in the PPY/CuO provides support to the fragile polymer backbone resulting in an excellent cycle stability and a markedly enhanced thermal stability. These together with the exhibition of an excellent coulombic efficiency demonstrates that incorporation of rare earth metal oxide can play a significant role in improving the performance of a Polymeric Composite opted as an electrode material for high-performance supercapacitor.
S. Alfaify - One of the best experts on this subject based on the ideXlab platform.
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design of smart optical sensor using polyvinyl alcohol fluorescein sodium salt laser filters and optical limiting effect
Journal of Molecular Structure, 2018Co-Authors: I.s. Yahia, A. Bouzidi, H.y. Zahran, W. Jilani, S. AlfaifyAbstract:Abstract Pure poly (vinyl alcohol) (PVA) and PVA doped Fluorescein-Sodium salt (FSS/PVA Composite films) have synthesized on wide scale laser optical filters. The investigated Polymeric Composite films have been characterized using several methods. The XRD patterns exhibit a decrease of the average crystalline size and an increase of the internal strain, which explained the imperfection and distortion in the prepared films. The optical characterizations showed a decrease in the transmission of the incident light for different samples, which may be explained to the layer formed by intermolecular hydrogen bonding between the PVA matrix and the FSS particles. The FSS/PVA Polymeric Composite films are being a completely blocking in the UV–Vis light at the range between 190 and 560 nm, agreement with the optical limiting effect, which makes the Composite films suitable for CUT-OFF laser filters applications. The decrease in its, directly and indirectly, allowed transition band gaps were controlled by the added FSS dyes molecules. The variation of the exponent frequency (s) of the power law for FSS/PVA Polymeric Composite films has been characterized to improve the hopping conduction mechanism in the materials. The dielectric permittivity (e′) and dielectric loss (e’’) have been decreased with increasing the applied frequency, and the incorporated FSS molecules due to the DC electric conductivity can cause the decreases of the polarization of the as-prepared films over the studied ranges.
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Design of smart optical sensor using polyvinyl alcohol/Fluorescein sodium salt: Laser filters and optical limiting effect
Journal of Molecular Structure, 2018Co-Authors: I.s. Yahia, A. Bouzidi, H.y. Zahran, W. Jilani, S. Alfaify, Hamed Algarni, Hajer GuermaziAbstract:Abstract Pure poly (vinyl alcohol) (PVA) and PVA doped Fluorescein-Sodium salt (FSS/PVA Composite films) have synthesized on wide scale laser optical filters. The investigated Polymeric Composite films have been characterized using several methods. The XRD patterns exhibit a decrease of the average crystalline size and an increase of the internal strain, which explained the imperfection and distortion in the prepared films. The optical characterizations showed a decrease in the transmission of the incident light for different samples, which may be explained to the layer formed by intermolecular hydrogen bonding between the PVA matrix and the FSS particles. The FSS/PVA Polymeric Composite films are being a completely blocking in the UV–Vis light at the range between 190 and 560 nm, agreement with the optical limiting effect, which makes the Composite films suitable for CUT-OFF laser filters applications. The decrease in its, directly and indirectly, allowed transition band gaps were controlled by the added FSS dyes molecules. The variation of the exponent frequency (s) of the power law for FSS/PVA Polymeric Composite films has been characterized to improve the hopping conduction mechanism in the materials. The dielectric permittivity (e′) and dielectric loss (e’’) have been decreased with increasing the applied frequency, and the incorporated FSS molecules due to the DC electric conductivity can cause the decreases of the polarization of the as-prepared films over the studied ranges.
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synthesis and characterization of wide scale uv vis cut off laser filter using methyl violet 6b pmma Polymeric Composite films
Sensors and Actuators A-physical, 2018Co-Authors: I.s. Yahia, S. Alfaify, Sherif M A S Keshk, A M Elnaggar, M M AbutalibAbstract:Abstract Poly(methyl methacrylate) (PMMA) doped with different weight percent of methyl violet-6B (MV-6B) as Polymeric films were prepared by a casting method. Different concentrations of MV-6B can affect both the crystal structure and optical properties of PMMA. The broad hump diffraction peaks present in PMMA at 2θ = 15.27°, 30.60°, and 40.69° are ascribed to amorphous PMMA. During the incorporation of MV-6B dye onto PMMA, the intense peaks of PMMA at the 2θ value of 15.27° and 30.6° became less intense, and d -spacing was changed. The X-ray results confirmed the strong electrostatic interaction of the cationic MV-6B dye with the anionic PMMA polymer. Furthermore, the transmittance of PMMA/MV-6B Composites is decreased with the increase of MV-6B dopants concentrations onto the PMMA matrix; this may be attributed to the electrostatic interaction between the PMMA chains and the molecules of methyl violet-6B. MV-6B-doped PMMA possesses three distinct band gaps corresponding to the pure PMMA, and other two band gaps are for the MV-6B /PMMA Composite films. PMMA/MV films with 3.333 wt% of MV-6B) showed a large scale CUT-OFF laser filter inside in the range from 190 to 670 nm. Our designed filter is a unique Polymeric Composite film for optoelectronic and laser applications.
Mahdi S Alajmi - One of the best experts on this subject based on the ideXlab platform.
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correlation between mechanical properties with specific wear rate and the coefficient of friction of graphite epoxy Composites
Materials, 2015Co-Authors: Mahdi S Alajmi, A. ShalwanAbstract:The correlation between the mechanical properties of Fillers/Epoxy Composites and their tribological behavior was investigated. Tensile, hardness, wear, and friction tests were conducted for Neat Epoxy (NE), Graphite/Epoxy Composites (GE), and Data Palm Fiber/Epoxy with or without Graphite Composites (GFE and FE). The correlation was made between the tensile strength, the modulus of elasticity, elongation at the break, and the hardness, as an individual or a combined factor, with the specific wear rate (SWR) and coefficient of friction (COF) of Composites. In general, graphite as an additive to Polymeric Composite has had an eclectic effect on mechanical properties, whereas it has led to a positive effect on tribological properties, whilst date palm fibers (DPFs), as reinforcement for Polymeric Composite, promoted a mechanical performance with a slight improvement to the tribological performance. Statistically, this study reveals that there is no strong confirmation of any marked correlation between the mechanical and the specific wear rate of filler/Epoxy Composites. There is, however, a remarkable correlation between the mechanical properties and the friction coefficient of filler/Epoxy Composites.
