Noor Sabaah - Academia.edu (original) (raw)

Papers by Noor Sabaah

Iraqi journal of science, 2011

Journal of Al-Nahrain University-Science, Mar 1, 2010

This research has been done by reinforcing the matrix (polyester) resin with natural material (fr... more This research has been done by reinforcing the matrix (polyester) resin with natural material (frond palm). The fibers were exposure to chemical treatment before reinforcement. Different volume fractions were used (0%, 15%, 20%). After preparation of composite material some of the physical properties have been studied of samples preparation. They were Tensile strength test, Impact test, and Thermal conductivity. The thermal conductivity was studied, the values of thermal conductivity were increased with increasing of volume fraction of all specimens and also the tensile strength and flexural strength were decreased with increasing volume fraction of fibers, while the impact strength was increased with volume fraction 15% but with continuouity of reinforcement, the impact strength was decreased, and also the chemical treatment of fibers improved the mechanical and thermal properties.

The study was carried out by the preparing of PbTe thin films and studying the effect of annealin... more The study was carried out by the preparing of PbTe thin films and studying the effect of annealing temperatures on electrical and optical properties. The PbTe thin films have been prepared by thermal evaporation in a vacuum of (2*10 -5 ) Torr with thickness 500nm at room temperature and annealed at different annealing temperatures of (373,423,473)K for 30 min. The electrical measurements show that the PbTe thin films have two kinds of activation energy which increases with increasing annealing temperature. The Hall Effect measurements prove that thin films are n-type at room temperature and convert to p-type by annealing temperature and it is found that NH decreases with increasing annealing temperature but μH increases with increasing annealing temperature. The optical measurements show that the PbTe thin films have direct energy gap which show that energy gap increases with increasing annealing temperatures and it is found the transmittance increases with increasing annealing temperatures ﻼﺨﻟا

The present study deals with the effects of natural fibers on some mechanical properties of the E... more The present study deals with the effects of natural fibers on some mechanical properties of the Epoxy composite. This research was carried out by reinforcing the matrix (Epoxy) resin with natural material (cane sugar fibers) and synthetic fibers (chopped carbon fibers). The natural fibers were exposure to chemical treatment before reinforcement. The hybrid composites contain of chopped carbon and cane sugar fibers is produced using hand lay method. Each sample was reinforced with different volume fraction such as 30%, 20%, and 10%. After preparation of composite material some of the mechanical properties flexural and impact tests were studied of prepared samples. Cane sugar composite has the higher values (of flexural strength 490.77 MPa and of impact strength 93.92 KJ/m 2) than chopped carbon composites (flexural strength 93.19 MPa and impact strength 23.92 KJ/m 2). It was found that the additions of natural fibers (cane sugar) to chopped carbon fibers improve of the mechanical properties of hybrid composites.

Jornual of AL-Farabi for Engineering Sciences

Natural fibers are playing a major role in so many applications such as biomedical applications, ... more Natural fibers are playing a major role in so many applications such as biomedical applications, aerospace Industry, structural applications, and automotive. This review aims to provide an overview of technological process (chemical treatment), availability, and the most prominent applications of natural fibers that made them preferable to be employed in these applications.

uotechnology.edu.iq

The present study deals with the effects of natural fibers on some mechanical properties of the E... more The present study deals with the effects of natural fibers on some mechanical properties of the Epoxy composite. This research was carried out by reinforcing the matrix (Epoxy) resin with natural material (cane sugar fibers) and synthetic fibers (chopped ...

Journal of Al-Nahrain University Science, 2010

This research has been done by reinforcing the matrix (polyester) resin with natural material (fr... more This research has been done by reinforcing the matrix (polyester) resin with natural material (frond palm). The fibers were exposure to chemical treatment before reinforcement. Different volume fractions were used (0%, 15%, 20%). After preparation of composite material some of the physical properties have been studied of samples preparation. They were Tensile strength test, Impact test, and Thermal conductivity. The thermal conductivity was studied, the values of thermal conductivity were increased with increasing of volume fraction of all specimens and also the tensile strength and flexural strength were decreased with increasing volume fraction of fibers, while the impact strength was increased with volume fraction 15% but with continuouity of reinforcement, the impact strength was decreased, and also the chemical treatment of fibers improved the mechanical and thermal properties.

Fullerenes, Nanotubes and Carbon Nanostructures, 2021

The addition of graphene as an efficient nano-filler to different polymer matrices lead to a subs... more The addition of graphene as an efficient nano-filler to different polymer matrices lead to a substantial improvement in different physical properties which, as a result, pave the way towards promis...

The study was carried out by the preparing of PbTe thin films and studying the effect of annealin... more The study was carried out by the preparing of PbTe thin films and studying the effect of annealing temperatures on electrical and optical properties. The PbTe thin films have been prepared by thermal evaporation in a vacuum of (2*10 -5 ) Torr with thickness 500nm at room temperature and annealed at different annealing temperatures of (373,423,473)K for 30 min. The electrical measurements show that the PbTe thin films have two kinds of activation energy which increases with increasing annealing temperature. The Hall Effect measurements prove that thin films are n-type at room temperature and convert to p-type by annealing temperature and it is found that NH decreases with increasing annealing temperature but μH increases with increasing annealing temperature. The optical measurements show that the PbTe thin films have direct energy gap which show that energy gap increases with increasing annealing temperatures and it is found the transmittance increases with increasing annealing temp...

Journal of Physics: Conference Series

The doping process with materials related to carbon has become a newly emerged approach for achie... more The doping process with materials related to carbon has become a newly emerged approach for achieving an improvement in different physical properties for the obtained doped films. Thin films of CuPc: C60 with doping ratio of (100:1) were spin-coated onto pre-cleaned glass substrates at room temperature. The prepared films were annealed at different temperatures of (373, 423 and 473) K. The structural studies, using a specific diffractometry of annealed and as deposited samples showed a polymorphism structure and dominated by CuPc with preferential orientation of the plane (100) of (2θ = 7) except at temperature of 423K which indicated a small peak around (2θ = 31) for C60. AFM remarks showed the existence of a compact packing film with a smooth surface. The FTIR spectra emphasized the bonding between CuPc and C60. UV-Vis Absorption spectroscopy confirmed that the CuPc was dominating the optical properties with a small shift in Q band towards higher wavelengths.

The reinforcement of different polymers by natural fibers has recently been the center of attenti... more The reinforcement of different polymers by natural fibers has recently been the center of attention among many research groups around the globe. The major factors that affect the mechanical performance for the composites are the surface treatment for the reinforcing material as well as the variation in the fiber diameters. In this study, coir fibers with different grain sizes varied between 250 and 950 μm were chemically treated by alkali solution and employed as a reinforcing agent for epoxy. The morphology and the mechanical performance represented by impact and flexural strength for the neat polymer and the resulted composites were investigated. The weight fraction was 10.0 wt %, and the approach employed for preparing the samples was hand layup technique. The obtained results confirmed a mechanical improvement for the composites compared to the neat polymer. Flexural strength was considerably improved (~ 94%) for the composite with higher grain size of 950 μm. On the other hand,...

Iraqi journal of science, 2011

Journal of Al-Nahrain University-Science, Mar 1, 2010

This research has been done by reinforcing the matrix (polyester) resin with natural material (fr... more This research has been done by reinforcing the matrix (polyester) resin with natural material (frond palm). The fibers were exposure to chemical treatment before reinforcement. Different volume fractions were used (0%, 15%, 20%). After preparation of composite material some of the physical properties have been studied of samples preparation. They were Tensile strength test, Impact test, and Thermal conductivity. The thermal conductivity was studied, the values of thermal conductivity were increased with increasing of volume fraction of all specimens and also the tensile strength and flexural strength were decreased with increasing volume fraction of fibers, while the impact strength was increased with volume fraction 15% but with continuouity of reinforcement, the impact strength was decreased, and also the chemical treatment of fibers improved the mechanical and thermal properties.

The study was carried out by the preparing of PbTe thin films and studying the effect of annealin... more The study was carried out by the preparing of PbTe thin films and studying the effect of annealing temperatures on electrical and optical properties. The PbTe thin films have been prepared by thermal evaporation in a vacuum of (2*10 -5 ) Torr with thickness 500nm at room temperature and annealed at different annealing temperatures of (373,423,473)K for 30 min. The electrical measurements show that the PbTe thin films have two kinds of activation energy which increases with increasing annealing temperature. The Hall Effect measurements prove that thin films are n-type at room temperature and convert to p-type by annealing temperature and it is found that NH decreases with increasing annealing temperature but μH increases with increasing annealing temperature. The optical measurements show that the PbTe thin films have direct energy gap which show that energy gap increases with increasing annealing temperatures and it is found the transmittance increases with increasing annealing temperatures ﻼﺨﻟا

The present study deals with the effects of natural fibers on some mechanical properties of the E... more The present study deals with the effects of natural fibers on some mechanical properties of the Epoxy composite. This research was carried out by reinforcing the matrix (Epoxy) resin with natural material (cane sugar fibers) and synthetic fibers (chopped carbon fibers). The natural fibers were exposure to chemical treatment before reinforcement. The hybrid composites contain of chopped carbon and cane sugar fibers is produced using hand lay method. Each sample was reinforced with different volume fraction such as 30%, 20%, and 10%. After preparation of composite material some of the mechanical properties flexural and impact tests were studied of prepared samples. Cane sugar composite has the higher values (of flexural strength 490.77 MPa and of impact strength 93.92 KJ/m 2) than chopped carbon composites (flexural strength 93.19 MPa and impact strength 23.92 KJ/m 2). It was found that the additions of natural fibers (cane sugar) to chopped carbon fibers improve of the mechanical properties of hybrid composites.

Jornual of AL-Farabi for Engineering Sciences

Natural fibers are playing a major role in so many applications such as biomedical applications, ... more Natural fibers are playing a major role in so many applications such as biomedical applications, aerospace Industry, structural applications, and automotive. This review aims to provide an overview of technological process (chemical treatment), availability, and the most prominent applications of natural fibers that made them preferable to be employed in these applications.

uotechnology.edu.iq

The present study deals with the effects of natural fibers on some mechanical properties of the E... more The present study deals with the effects of natural fibers on some mechanical properties of the Epoxy composite. This research was carried out by reinforcing the matrix (Epoxy) resin with natural material (cane sugar fibers) and synthetic fibers (chopped ...

Journal of Al-Nahrain University Science, 2010

This research has been done by reinforcing the matrix (polyester) resin with natural material (fr... more This research has been done by reinforcing the matrix (polyester) resin with natural material (frond palm). The fibers were exposure to chemical treatment before reinforcement. Different volume fractions were used (0%, 15%, 20%). After preparation of composite material some of the physical properties have been studied of samples preparation. They were Tensile strength test, Impact test, and Thermal conductivity. The thermal conductivity was studied, the values of thermal conductivity were increased with increasing of volume fraction of all specimens and also the tensile strength and flexural strength were decreased with increasing volume fraction of fibers, while the impact strength was increased with volume fraction 15% but with continuouity of reinforcement, the impact strength was decreased, and also the chemical treatment of fibers improved the mechanical and thermal properties.

Fullerenes, Nanotubes and Carbon Nanostructures, 2021

The addition of graphene as an efficient nano-filler to different polymer matrices lead to a subs... more The addition of graphene as an efficient nano-filler to different polymer matrices lead to a substantial improvement in different physical properties which, as a result, pave the way towards promis...

The study was carried out by the preparing of PbTe thin films and studying the effect of annealin... more The study was carried out by the preparing of PbTe thin films and studying the effect of annealing temperatures on electrical and optical properties. The PbTe thin films have been prepared by thermal evaporation in a vacuum of (2*10 -5 ) Torr with thickness 500nm at room temperature and annealed at different annealing temperatures of (373,423,473)K for 30 min. The electrical measurements show that the PbTe thin films have two kinds of activation energy which increases with increasing annealing temperature. The Hall Effect measurements prove that thin films are n-type at room temperature and convert to p-type by annealing temperature and it is found that NH decreases with increasing annealing temperature but μH increases with increasing annealing temperature. The optical measurements show that the PbTe thin films have direct energy gap which show that energy gap increases with increasing annealing temperatures and it is found the transmittance increases with increasing annealing temp...

Journal of Physics: Conference Series

The doping process with materials related to carbon has become a newly emerged approach for achie... more The doping process with materials related to carbon has become a newly emerged approach for achieving an improvement in different physical properties for the obtained doped films. Thin films of CuPc: C60 with doping ratio of (100:1) were spin-coated onto pre-cleaned glass substrates at room temperature. The prepared films were annealed at different temperatures of (373, 423 and 473) K. The structural studies, using a specific diffractometry of annealed and as deposited samples showed a polymorphism structure and dominated by CuPc with preferential orientation of the plane (100) of (2θ = 7) except at temperature of 423K which indicated a small peak around (2θ = 31) for C60. AFM remarks showed the existence of a compact packing film with a smooth surface. The FTIR spectra emphasized the bonding between CuPc and C60. UV-Vis Absorption spectroscopy confirmed that the CuPc was dominating the optical properties with a small shift in Q band towards higher wavelengths.

The reinforcement of different polymers by natural fibers has recently been the center of attenti... more The reinforcement of different polymers by natural fibers has recently been the center of attention among many research groups around the globe. The major factors that affect the mechanical performance for the composites are the surface treatment for the reinforcing material as well as the variation in the fiber diameters. In this study, coir fibers with different grain sizes varied between 250 and 950 μm were chemically treated by alkali solution and employed as a reinforcing agent for epoxy. The morphology and the mechanical performance represented by impact and flexural strength for the neat polymer and the resulted composites were investigated. The weight fraction was 10.0 wt %, and the approach employed for preparing the samples was hand layup technique. The obtained results confirmed a mechanical improvement for the composites compared to the neat polymer. Flexural strength was considerably improved (~ 94%) for the composite with higher grain size of 950 μm. On the other hand,...