Browsing by Author "Ahmed, Md Kawsar"

Now showing 1 - 3 of 3

Open Access
Improved mechanical properties of the E-glass fibres through TiO2 nanoparticle coating
(Taylor & Francis, 2023-07-01) Ahmed, Md Kawsar; Behboud, Ali Bagheri; Kurucu, Arda; Kurt Çömlekçi, Göksenin; Ordu, Mustafa
In this work, the mechanical properties of nanoparticle-coated E-glass fibres were investigated for high-performance composites. Glass fibres were dip-coated in TiO2 solutions by varying the concentration of nanoparticles. Single-filament tensile test was performed on bare and coated fibres to understand the effects of nanoparticles and the concentration of solutions on the mechanical properties. The analysis was carried out using two-parametrical Weibull distribution, and the result indicates that the nanoparticle-coated glass fibres have a lower probability of failure than the bare fibres. The tensile strengths of the fibres were improved up to 7.31%, 11.71% and 9.67% by coating with 5%, 10% and 15% nanoparticle solutions, respectively. The nanoparticle-coating of glass fibres has positively affected the mechanical properties against fabrication-related surface defects.
Open Access
Mechanical and chemical properties of nanoparticle-coated E-glass fibers for composites applications
(2023-07) Ahmed, Md Kawsar
Glass fibers are the most extensively employed reinforcement materials in the fiber-reinforced composites field owing to their superior mechanical properties with cost-effectiveness. The mechanical and chemical properties of the composites are greatly dependent upon the reinforcement materials. In order to enhance the performance of composites, it is necessary to improve the mechanical property of the reinforcement materials, i.e., glass fibers. In this thesis, the mechanical and chemical properties of E-glass fibers were investigated via the incorporation of metal oxide nanoparticles. As part of this process, E-glass fibers were dip-coated with nanoparticle solutions using titania (TiO2), silica (SiO2), and zirconia (ZrO2) nanoparticles. Microscopic and spectroscopic analysis proved the presence of nanoparticles on the surface of the fibers. Tensile tests were conducted on bare and nanoparticle-coated fibers to see the effect of coating and the concentration of nanoparticles over the fiber’s surface. Weibull statistical analysis was carried out on bare and coated fibers to see the effect of stress on the probability of failures of the E-glass fibers. A fractographic study was also carried out on E-glass fibers to see the effect of tensile strength on the mirror region of the fracture surface. Additionally, chemical analysis was also carried out to see the resistivity of the fibers in a highly alkaline environment. The results suggest that glass fibers coated with TiO2 nanoparticles improved the tensile strength of fibers up to 11.7% by providing a lower probability of failure. On the other hand, coating with SiO2 nanoparticles had a slightly negative impact on the strength of fibers due to the lower quality of coating, leading to a decrease in the tensile strength and an increase in the probability of failure. Moreover, ZrO2 nanoparticles were found effective in providing resistance against the corrosion to the glass fibers in an alkaline environment for up to 4 days of dwelling. Nanoparticle-coated E-glass fibers are expected to improve the mechanical and chemical properties of glass fiber-reinforced composites for various industrial applications in the future.
Embargo
Zirconia nanoparticle coating for high-strength and alkali-resistant glass fibers
(Elsevier B.V., 2023-08-16) Behboud, Ali Bagheri; Ahmed, Md Kawsar; Kurucu, Arda; Çömlekçi, G. K.; Ordu, Mustafa
In this study, the effect of zirconia nanoparticle coating on the chemical and mechanical characteristics of E-glass fibers was investigated for usage in an alkaline environment. E-glass fibers were dip-coated in aqueous zirconia nanoparticle solutions that have varying concentrations of nanoparticles. Tensile tests were conducted on bare and coated fibers to determine the impact of nanoparticles on the strength of fibers. According to the mechanical analysis, the tensile strengths of the fibers were enhanced by 10.2%, 12.2%, 14.6%, and 17.4% for 5%, 10%, 15%, and 20% of nanoparticles in the solutions, respectively. The role of zirconia coating on the alkali resistance of fibers was investigated in a NaOH-based alkaline solution. Zirconia nanoparticle-coated fibers with 15% and 20% solutions were not corroded in the alkaline environment after dwelling for 500 h. The coating also prevented the degradation of mechanical properties, and the aged fibers maintained similar tensile characteristics.