Conference Publications
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PublicationChemically chitosan modified with methyl methacrylate and its effect on mechanical and thermal properties of polypropylene composites( 2013)Effects of methyl methacrylate on the properties of chitosan-filled polypropylene (PP) composites has been investigated. Mechanical and thermal properties of the composites were analyzed according to ASTM D 638-91, thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC). The results showed that tensile strength of PP composites decreased upon the addition of chitosan, while Young's modulus improved. At a similar filler loading, the treated PP/chitosan composites were found to have higher tensile strength and Young's modulus as compared with the untreated composites. Thermal analysis results showed that thermal stability and crystallinity of the treated composites were higher than the untreated ones. Scanning electron microscopy (SEM) and Fourier transforms infrared (FTIR) studies revealed less detached filler from matrix on tensile surface of the treated composites as an evidence of enhanced filler-matrix interfacial adhesion due to formation of ester-bridge between the chitosan and the methyl methacrylate.
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PublicationDesign and development of a cordless screwdriver: An analysis( 2021-07-21)The aim of this paper is to focus on some important aspects of the use of cordless screwdrivers in situations of work. Emphasizes on comfort while user uses cordless screwdriver. Descriptors of comfort in the use of hand tools have been collected from interviews. Functionality and physical interaction have been found to be the most important comfort factors in using a screwdriver. The ergonomically modified screwdriver handle provides greater operational efficiency. The findings of this research is significant in contemplating on the differences between discomfort and comfort. Cordless Screwdriver with built-in power of 3.7 kilowatts has been established. A better battery, with a voltage display, was made comfortable for consumers. In addition, the soft grip handle will allow the consumer to have a relaxed grip when using the product.
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PublicationDesign and development of a cordless screwdriver: An analysis( 2021-07-21)The aim of this paper is to focus on some important aspects of the use of cordless screwdrivers in situations of work. Emphasizes on comfort while user uses cordless screwdriver. Descriptors of comfort in the use of hand tools have been collected from interviews. Functionality and physical interaction have been found to be the most important comfort factors in using a screwdriver. The ergonomically modified screwdriver handle provides greater operational efficiency. The findings of this research is significant in contemplating on the differences between discomfort and comfort. Cordless Screwdriver with built-in power of 3.7 kilowatts has been established. A better battery, with a voltage display, was made comfortable for consumers. In addition, the soft grip handle will allow the consumer to have a relaxed grip when using the product.
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PublicationFactors of Controlling the Formation of Titanium Dioxide (TiO2) Synthesized using Sol-gel Method - A Short Review( 2022-01-24)There have been experiments on TiO2 thin films synthesized utilizing sol-gel techniques. The sol-gel method is a straightforward technology that gives numerous benefits to the researcher, for instance, material's reliability, reproducibility, and controllability. Following from there, it can be utilized to make high-quality nano-structured thin films. According to previous studies, the TiO2 films' characteristics occur to be highly dependent on the production parameters and initial materials utilized. Controlling the formation of TiO2 thin films with the sol-gel method was momentarily discussed here.
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PublicationA Comprehensive Evaluation of Pozzolanic Activity of Ancient Brick Powders Wastes—BPW in Cement Based Materials( 2022-01-01)The recovery potential of bricks wastes in obtaining environmental friendly materials is sustained by their pozzolanic properties, which can be exploited within a Portland cement—brick powder waste (BPW) system, thus reducing the amount of waste as well as the consumption of raw materials and CO2 emissions from cement factories. These properties were intensively studied and reported in the literature, for their assessment often being used direct analytical methods to highlight the presence of Ca(OH)2 and its subsequent reduction in abundance with time as the pozzolanic reaction proceeds. Since it is more difficult to quantify the pozzolanic activity of calcined clay in a Portland cement /brick powder mixture, for the present work classical determinations, such as thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM) were combined with the individual assessment of BPW in terms of pozzolanicity in order to study the variation of the Ca2+ respectively OH− ions concentration within a BWP—lime saturated solution. SEM analyses showed CH and CSH formation and the DTA curve highlighted a more intense peak around 500 °C after 28 days of hydration, where the Ca(OH)2 decomposition take place. The pozzolanicity test results showed a pronounced decrease of Ca2+ concentration after 28 days.
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