تصفح Materials Science & Technology حسب تاريخ النشر
السجلات المعروضة 1 -- 20 من 59
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SEPARATION OF OIL/WATER MIXTURES BY CHEMICALLY MODIFIED MELAMINE FOAMS
(06-2 , Master Thesis)Polymeric foams represent suitable porous sorbents for separating various contaminants dispersed in water. One of the most common polymeric foams is melamine (ME) foams, which are particularly suitable for removing oil ... -
PREPARATION OF WS2/TIO2 NANOSTRUCTURES FOR PHOTOCATALYTIC APPLICATIONS
(06-2 , Master Thesis)The energy from fossil fuels has been recognized as a main factor of global warming and environmental pollution. Therefore, there is an urgent need to replace fossil fuels with clean, cost-effective, long-lasting, and ... -
PREPARATION AND CHARACTERIZATION OF POLYMERIC FOAMS FOR REMOVAL OF FREE OIL FROM WATER
(06-2 , Master Thesis)Development of polymeric foams for removal of oily pollutants (spills) from water is a key target of this thesis. Pollutants occur in the form of free oil (floating on the water surface) or oil/water macroscopic, non-stabilized ... -
AN IMPROVEMENT OF INTERFACIAL ADHESION BETWEEN AL FOIL AND LOW DENSITY PE THROUGH BLENDING WITH FUNCTIONLIZED POLYMERS
(06-2 , Master Thesis)An enhancement of interfacial adhesion between low density PE (LDPE), particularly QAPCO LDPE packing grade and aluminum foil is an important challenge in designing of multilayered packaging (TetraPak type of packaging) ... -
The Role of Key Impurity Elements on the Performance of Aluminium Electrolysis - Current Efficiency and Metal Quality
(2015 , Master Thesis)Impurities such as phosphorus and silicon mainly enter the aluminium electrolysis process with alumina. These impurities dissolve in the electrolyte and affect the performance of the electrolysis, the emissions from the ... -
Chemical Treatment and Characterization of Qatalum’s 1st Cut Spent Spot Lining (SPL)
(2015 , Master Thesis)Spent pot lining (SPL) waste is produced in thousands of tons annually from the aluminium production factories including Qatar Aluminum Company, Qatalum. SPL is classified into first and second cut; the first cut is mainly ... -
Physico-Mechanical Properties of New Electrospun Polyvinylidene Fluoride Nanocomposites
(2015 , Master Thesis)This study aimed to prepare and characterize poly(vinylidene fluoride) (PVDF) nanofibres with the following additives: graphene oxide (GO), cellulose, and silver nanoparticles (Ag-NPs). Two types of solvents were used to ... -
Surface characterization and luminescence properties of AlN doped with RE elements (Sm, Ho, Gd, Tm)
(2015 , Master Thesis)Rare‐ earth (RE)‐doped III‐nitride broad band‐gap semiconductors have attracted enormous interest as a foundation for optoelectronics devices, which combine the unique luminescence feature of Rare‐earth ions with the ... -
Thermal Stabilization and Mechanical Properties of Nanocrystalline Al and Al-Li Alloys
(2016 , Master Thesis)Aluminum alloys in the conventional grain size state have had their share of research and are implemented in a variety of applications in our everyday life such as being the main structural materials in automobiles, ... -
MOLECULAR LEVEL UNDERSTANDING OF NANOCLAY DISPERSION IN POLYSULFONE, POLYIMIDE, AND THEIR BLEND COMPOSITES
(2016 , Master Thesis)Polymer composites based on polysulfone (PSF) and polyimide (PI) are used as membranes for gas separation and water purification applications. However, structure composition related issues limit the performance of the used ... -
Heat Absorbers based on Recycled Polyethylene and Paraffin Wax for Energy Storage
(2016 , Master Thesis)The building sector is one of the main sectors in Qatar; however, it consumes a huge portion of primary energy sources. Today, there is a worldwide trend to utilize renewable sources of energy to cover buildings’ energetic ... -
SYNTHESIS AND PROPERTIES OF NANOCRYSTALLINE BI-TE BASED THERMOELECTRIC MATERIALS FOR ENERGY APPLICATION
(2016 , Master Thesis)Thermoelectric phenomenon is the science associated with converting thermal energy into electricity based on the Seebeck effect. Bismuth telluride Bi2Te3 is currently considered to be the state-of-the art thermoelectric ... -
NITROGEN AND SULFUR– DOPED CARBON NANOFIBER MIXED OXIDES COMPOSITES FOR SUPERCAPACITOR APPLICATIONS
(2016 , Master Thesis)Energy storage devices including supercapacitor are among the rapidly growing field of alternatives for rechargeable batteries due to its high energy density and long life cyclability performance. Electrospinning is a ... -
Corrosion inhibition of Mild Steel at Elevated temperature in highly Acidic Brines using a green corrosion inhibitor
( Material Science and Technology , 2017 , Master Thesis)Corrosion Inhibition of mild steel in 5 M Hydrochloric acid solution at different temperatures was investigated using a new green corrosion inhibitor (lauramidopropylamine oxide). Various electrochemical techniques and ... -
NEW FLEXIBLE POLYVINYLIDENE FLUORIDE NANOCOMPOSITES FOR FUTURE APPLICATIONS
(2017 , Master Thesis)In this work, we report novel flexible polyvinylidene fluoride (PVDF) hybrid pressure sensors with good mechanical properties. Hybrid combinations of reduced graphene oxide (rGO) with different nano metal oxides -titanium ... -
Properties and thermal stabilization of Nanocrystalline copper via solute additions of niobium
(2017 , Master Thesis)Nanocrystalline materials, those with grain size <100 nm, were found to have superior mechanical properties compared to their coarse-grained (CG) counterparts. However, these materials are not thermally stable because of ... -
Er Doped III-Nitride Semiconductors
(2017 , Master Thesis)Erbium ions (Er3+) doped in a solid material enables the intra 4f shell transitions from its first excited state (4I13/2) to the ground state (4I15/2). The intra-4f shell transition at 1540 nm is of exceptional interest ... -
Preparation and characterization of flexible all solid state CNT/MnO2 Supercapacitors
(2018 , Master Thesis)In this work, CNTs/MnO2 hybrid supercapacitors were prepared using RF magnetron sputtering as deposition technique. The as-prepared composite materials were characterized by different morphology and spectroscopy techniques, ... -
CARBON BASED CONDUCTIVE FIBERS FOR FUEL CELL APPLICATION
(2018 , Master Thesis)A novel catalyst consists of a group of metals (Ni, Co and Cu) deposited on carbon fiber support and was prepared for oxidation using methanol and ethanol in alkaline medium. The carbon fiber support was fabricated by ... -
NEW SULFUR-DOPED CARBON FIBER – SUPPORTED ALLOYS FOR ELECTROCATALYTIC REDUCTION OF OXYGEN FOR PEM FUEL CELLS APPLICATIONS
(2018 , Master Thesis)The daily increase in the world needs for new sources of energy, the population and economy growth, and the industrial expansions made the demand for new sources of energy a critical request within different societies. ...
