Yazar "Ozkan, Ilkan" seçeneğine göre listele

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    A review of non-petroleum alternatives of plastic mulches in agriculture: Knowledge gaps and future recommendations
    (Elsevier, 2026) Gundogdu, Sedat; Akca, Muhittin Onur; Ozkan, Ilkan; Saridas, Mehmet Ali; Kucukel, Ezgi; Rodriguez-Seijo, Andres; Er, Eylul; Turgay, Oguz Can
    Plastic mulch films have long been favored in agriculture due to their ability to boost crop yields, conserve moisture, and manage weed growth. However, the environmental persistence of plastic residues in soils, particularly the formation of microplastics (MPs), has raised concerns regarding soil health and ecosystem biodiversity. This review investigates alternative solutions to conventional petroleum-based plastic mulches, exploring biodegradable polymers, natural fibers, and other sustainable materials. Biodegradable plastics show potential but present challenges in terms of incomplete degradation, which still leads to microplastic formation. Additionally, their cost and effectiveness under various agricultural conditions remain uncertain. Other alternatives, such as natural fiber mulches, offer eco-friendly options but face similar hurdles concerning durability and large-scale applicability. The review emphasizes the knowledge gaps in understanding the environmental impact of biodegradable mulches and calls for comprehensive research into their long-term effects on soil health. Sustainable waste management practices are also identified as crucial for mitigating plastic pollution in agriculture. The findings highlight the need for innovation in the development of biodegradable and recyclable alternatives to petroleum-based plastic mulches, ensuring that they meet both agricultural and environmental sustainability goals.
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    An Experimental Study on EMI Shielding and Antibacterial Activity of Woven Fabrics Including Silver Nanocomposite Yarns
    (Sage Publications Inc, 2024) Ilhan, Ilhami; Ozkan, Ilkan; Uslukul, Ozlem
    This study investigates electromagnetic interference shielding and antibacterial activity of industrial polyester/viscose woven fabrics, including silver (Ag) treated yarns, to obtain multifunctional fabric. For this purpose, thin film-coated, nanoparticle-doped, and chemically treated yarns were used as weft in three different densities. Nine fabric samples and the control sample were woven under industrial conditions. As a result, the surface conductivity of the thin film-coated samples is significantly higher than the others in all the measurement directions. Also, these samples exhibit the best electromagnetic shielding efficiency of up to 64 dB in the 3-43 GHz frequency range. In addition, electromagnetic shielding efficiency reaches 83 dB when the samples are measured in multiple layers. The chemically treated samples exhibited better antibacterial activity, up to 74%. It was determined that the nanoparticle's treatment type, position and density, and the number of fabric layers influence the performance properties.
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    Investigation of Performance Properties of Denim Fabrics Containing Cotton/Sustans® Blend Rotor Yarn
    (E.U. Printing And Publishing House, 2022) Ozkan, Muhittin; Baykal, Pinar Duru; Ozkan, Ilkan
    It is common to use open-end rotor yarn in the production of denim fabric, which is preferred by people of all ages and social status due to its durability and comfort. Recently, the demand for stretch denim fabrics that can take the body's shape due to the elastic fibers in its structure has been increasing. However, producing elastane-containing yarns in the rotor spinning system is not as practical as ring spinning. For this reason, this study aimed to use the staple Sustans (R) fibers with high elasticity in the rotor spinning system together with cotton fibers and reflect the good elasticity and elongation properties of Sustans (R) fibers to the rotor yarns and denim fabrics. In the study, the staple Sustans (R) fibers based on PTT (Polytrimethylene Terephthalate) were spun with cotton fibers in the rotor spinning system. Then denim fabrics were produced using these yarns in the weft. Later, strength (breaking and tear), dimensional stability (dimensional change after washing, fabric elasticity and growth), abrasion resistance and pilling tests were applied to the produced denim fabrics. Thus, the effects of using Sustans (R) fibers on the strength, dimensional stability, abrasion and pilling properties of denim fabrics were analyzed. As a result of the study, the dimensional change and growth values after washing were developed by using Sustans (R). Although good dimensional stability was observed in the samples, the degree of elasticity was lower than expected. The use of Sustans (R) at rates of 50% and above improved the pilling values of the fabrics. In addition, it has been determined that the use of Sustans (R) in terms of abrasion resistance has a more positive effect at the end of long wear periods.