iosr-jpte   Volume-8 ~ Issue-4 ~ Jul. – Aug. 2021

Abstract: As the waves of the financial crisis began to pound the centers of world finance, there have been some belated recognition of the danger posed by short term capital flows. Countries afflicted by the financial crisis have been forced to take their own measures to protect their economy. This paper proposes the use of Indigenous Textile (Aso-oke) as one of the instruments by which the problem of national economic meltdown in Nigeria can be solved by providing self reliance and job opportunities to other numerous people. The paper examines the history of Indigenous textile (Aso-oke), and reveals the raw materials for producing it. The paper also examines the prospect of traditional cloth production with its accompanying benefit of assuaging the delectating consequences of national economic meltdown. The paper makes recommendations on how such prospects can be utilized for national development.

Keywords: Economic meltdown, Assuaging, Aso-oke, Weaving and Loom.

Abstract: The purpose of this study is to select the appropriate model of cotton fiber properties and yarn strength using spatial REML method. The fiber quality properties and yarn strength data of 2019 cotton crop season was collected from cotton technical support office, maintenance cotton varieties section, Cotton Research Institute (CRI), Egypt. These data includes six cotton varieties namely; Giza 45, Giza 86, Giza 90, Giza 92, Giza 94 and Giza 95. The monitored cotton fiber quality properties were upper half mean, uniformity index, strength, elongation, micronaire, maturity ratio, reflectance percentage and yellowness degree. These characteristics were divided into eight groups of cotton fiber properties with each other. All cotton fiber properties had high level of spatial......

Key Word: Egyptian cotton, spatial REML model, cotton fiber properties

Abstract: Fiber-reinforced polymer composites have large applications in different important sectors like aerospace engineering biomedical engineering, constructions because of their light-weight and high strength. Tensile and flexural properties are the two ultimate factors for measuring the strength of materials. The role of fiber content, length, and their orientations on these two properties are explored in this study. Different chemical modifications to improve the surface property of fiber/matrix and hence improve the tensile and flexural properties of polymer composites are also reviewed in this paper.

Key Word: Fiber-reinforced polymer composites; Tensile property; Flexural property; Chemical Modifications; Fiber arrangement

Abstract: Bio-based plastics, which are degradable polymer-blends from renewable agricultural products had been investigated as good substitute for non-degradable petroleum-based plastics. The attempt is to modify the non-biodegradability, strong carbon-carbon bonds, hydrophobicity, and durability properties of conventional thermoplastics, to ensure their natural decomposition by soil microorganisms. The surface topography of the corn-starch/plastic blended-sheets were taken using a scanning electronic microscope (PPSK)SEM, model, before subjecting them to soil burial biodegradation process. The major bacteria species identified from the soil after culturing, incubation, and biochemical identifications were Staphylococus aureus, E. Coli, Samonella Sp., Bacillus Sp., Pseudomanas Sp., Lactobacillus Sp. etc. The mechanical properties, percentage weight-loss, reduction in tensile properties, water absorption properties, appearance of remarkable voids, and cracks on the plastic surfaces, as compared to the pure plastic samples, confirmed the extend of biodegradation.

Keywords: Bio-plastics, Microorganisms, Weight-loss, Tensile properties,

Abstract: A detailed analysis of the influence of PLA filament colour on thermal and optical properties of the 3D print was performed. Additionally, the correlation between the temperature of the nozzle of the 3D printer and quality of the printed model was investigated. To add more, a comparison between thermal properties of material exposed to different UV lights and a sample not exposed to such light was performed.
The spectrophotometry was used for an analysis of optical properties, such as absorbance, of the samples printed from PLA of different colours. The DSC analysis was used for measuring the thermal properties of the analysed samples. It was determined that the 3D printing process noticeably changes the thermal properties of the PLA filament. These changes were.......

Keywords: 3D printing, DSC analysis, spectrophotometry, PLA filament