Material Science Research Papers/Topics

Investigation of the efficacy of a ZnO-starch nanocomposite packaging to prolong the shelf life of fragaria ananassa (strawberries)

Abstract: Nanomaterials have been used recently in food packaging as antibacterial coatings because of their desirable antibacterial and antifungal properties. The use of antimicrobial packaging is to deter the growth of microorganisms responsible for spoilage or diseases in packaged foods, therefore prolonging their shelf life. In this study, potato peel starch and ZnO-starch nanocomposite paper (ZnO-starch NC paper) were developed and evaluated for antibacterial activity against Esche...

The effects of heavy metals on the quality and yield of vetiver grass (chrysopogon zizanioides) essential oil

Abstract: Vetiver grass (Chrysopogon zizanioides;CZ) is a well-known grass that can both remediate various heavy metals in soil as well as producing essential oil that is commonly used in premier perfumery, food and pharmaceutical industries. Due to this versatility property, this study was aimed at extracting essential oil from Chrysopogon zizanioides roots cultivated in SelibePhikwe mine tailings and study the quality and quantity (chemical composition and yield) of the Chrysopogon ziza...

The role of graphite addition on spark plasma sintered titanium nitride

Abstract: Composites of titanium nitride reinforced with graphite were synthesized using spark plasma sintering at 2000 °C. The effects of graphite addition on the microstructure, relative density, and mechanical properties of TiN ceramics matrix were examined. The investigation was performed on TiN powder with varying graphite content (1–5 wt.%) for 8 h using an energy ball milling equipment. Results show that TiN without and with graphite (TiN + 1 wt.% graphite) sintered at 2000 °C rec...

Synthesis and characterization of SnO2 nanofiller from recycled expanded polystyrene

Abstract: Polymer waste that has been viewed as a major threat to our environment is currently gaining attention as valuables resources are being obtained from it. Researchers are now developing nanocomposites/blends from plastic wastes as a way of recycling waste plastic rather than employing incineration and landfilling methods of recycling that are not environmentally friendly. The utilization of nanofiller to recycle waste polymers will enhance the mechanical, thermal and optical propert...

Temperature dependent electrical and gas sensing properties of ce/cuo nanostructures

Abstract: Research on semiconducting metal oxide (MO) nanostructures is a fascinating field that has received massive interest due to their significant physical and chemical properties which can be useful in the development of highly efficient nanodevices. Incorporating impurities such as metal elements into the MO matrix offers tailored properties for various applications. Doped MO nanostructures exhibit modified structural, optical, electrical and morphological properties rendering th...

Green synthesis of multilayer graphene/zno nanocomposite for photocatalytic application

Abstract: Green nanotechnology is an innovative research field with emphasis on the development of methods that minimize the use of health hazardous substances for environmental remediation. This study reports on the biosynthesis of nanostructured multilayer graphene (MLG) and zinc oxide (ZnO) from natural extracts for environmental applications. ZnO nanoparticles are fabricated for the first-time using Ageratum Houstonianum leaf extract as an effective chelating agent. Besides this, a ...

Bismuth Oxy-halide (BiOBrmI(1-m)) solid solutions for the photodegradation of methylene blue dye under solar and UV-light irradiation.

Abstract: Continuous discharge of textile wastes such as dyes into the water bodies deteriorates the quality of water. Therefore, the removal of these materials from the wastewater should be a priority due to their carcinogenic properties, which pose a health hazard to both human beings and aquatic life. The use of advanced oxidation processes (AOPs) for example heterogeneous photocatalysis has been broadly studied due to their efficacy in the removal of such organic contaminants. Engin...

Effect of Cd precursor on structure and optical properties of spin coated Zn0:9Cd0:1O films for optoelectronics applications

Abstract: The development of transparent conducting oxide materials has gained an increased interest in the scientific community for developing efficient low cost optoelectronic devices. The effect of Cd precursor on structural and optical properties of sol-gel synthesized Zn0.9Cd0.1O nanostructured films has been studied by using XRD, AFM, optical absorption and emission spectroscopic techniques. X-ray diffraction confirms the hexagonal wurtzite crystal structure of the deposited films and ...

Effect of Zr doping on the structural and electrical properties of spray deposited TiO2 thin films

Abstract: Doping is an effective material re-engineering technique, which provides a possibility of improving properties of materials for different applications. Herein, a Zr-doped TiO2 thin film was deposited applying the chemical spray pyrolysis method and the influence of varying zirconium dopant concentrations on the properties of the film was studied. Morphological studies showed that the Zr–TiO2 films were homogeneous with smaller grain sizes compared to the undoped TiO2 films. As-de...

Processing and characterization of a sorghum stem-based fibre polymer composite for building insulation application

Abstract: Agricultural residue-based fibrous (ARF) materials have been identified to be a commercially viable solution for energy-efficient building insulation application. ARFs have various advantages over synthetic fibers including environmentally friendly, light weight, low cost, and competent mechanical properties. Meanwhile, in many African countries including Botswana, the expertise to manufacture building insulators by using ARFs is scarce and consequently building insulation material...

A Review on Advancements of Nanocomposites as Efficient Anode Modifier Catalyst for Microbial Fuel Cell Performance Improvement

Non-renewable energy sources produced from natural coal and oil may result in climate change and global warming as greenhouse gases are to the environment. This is why the main utilization of energy sources on renewable and alternate green energy  to deliver power. Thus, a microbial fuel cell device is one of the cost-effective and environmentally friendly energy conversion devices that uses renewable organic wastes as fuel source and converts this stored chemical energy in to useful b...

Models Of Tensile Behaviour Of Meta-Stable Fe-Mn-Mo Alloys

ABSTRACT  A semi-mechanistic model for predicting the flow behaviour of Fe-Mn-Mo steels displaying transformation-induced plasticity is developed in this paper. The model, based on the law of mixtures, takes into account the work-hardening of the individual principal phases (namely, lath-martensite and austenite/epsilon martensite). The composite strength of such a steel may be given by a modified law of mixtures which incorporates a dislocation density effect. To test the validity of the m...

Development of Mathematical Equation for Fraction of Solid in AlSi7Mg Alloy Solidification Simulation

ABSTRACT Thermodynamic data is made use of in calculating fraction of metal solidified in solidification simulation. However, thermodynamic data for many industrial alloys in their solidification ranges are not available for most practicing engineers. It is thus desirable to develop reliable equations that can be used in calculating fraction of metal solidified for solidification simulation. This work has developed an equation to calculate fraction of metal solidified for AlSi7Mg alloy solid...

Effect of Iso-Thermal Treatment on the Corrosion Behaviour of Low Carbon Steel (Nigerian C2R grade) in a Buffered Solution containing Chloride and Carbonate Ions

Abstract This work has investigated the corrosion behavior of low carbon steel subjected to four different modes of iso-thermal heat treatment and then immersed in a neutral buffer corrosive medium containing carbonate and chloride ions.The low carbon steel material was cut into twenty small pieces of length 18±2mm, put in groups of five and subjected to: Annealing, Hardening, Normalizing and tempering, each corresponding to an iso-thermal mode of treatment. The samples were ground and poli...


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