Pamuk/Lyocell Kumaşların Titanyum (IV) Oksit Varlığında Ultraviyole Işınlarıyla Hetorojen Fotokataliz İle Ağartılması Ve Ağartma İşlemine Oksijen Radikali Varlığının Etkisinin İncelenmesi
| Autor: | Görkem Gedik |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Ultraviolet radiation
genetic structures Electron spin resonance techniques Cleaning Cotton Catalysis Industrial and Manufacturing Engineering Heterogeneous photocatalysis Ultraviolet light TiO2 General Materials Science Photocatalysis Cellulose Oxide minerals Photobleaching Photocatalytic characteristics Chemistry Hydrogen peroxide bleaching Oxygen radicals Spinning (fibers) Oxygen Bleaching process Environmental-friendly Textile finishing Magnetic moments Bleaching Titanium dioxide Cellulosic fibers sense organs Catalytic reactions Nuclear chemistry |
| Zdroj: | Tekstil ve Mühendis. 27:64-74 |
| ISSN: | 2147-0510 1300-7599 |
| DOI: | 10.7216/1300759920202711802 |
| Popis: | Cellulosic fibers, generally, are not used as final product or get further textile processes such as dyeing, printing or finishing, unless they are bleached. In this study, cotton/lyocell fabrics were bleached with ultraviolet radiation accompanied by TiO2. Photocatalytic characteristic of TiO2 was utilized for bleaching. Oxygen radical generation from TiO2 surface under UV radiation was ensured. The effect of TiO2 concentrations between 1-300 g/L was investigated. Optimum pH, temperature and durations were determined for the best bleaching effect. Hydrogen peroxide bleaching was carried out and the results were compared with photobleaching. The changes on the tenacity and hydrophilicity characteristics of the fabric were investigated. Oxygen radicals in the TiO2 bleaching bath were determined with Electron Spin Resonance technique and fluorescein assay. An alternative environmental friendly bleaching method which depends on catalytic reactions was presented as a result of the performed experiments. © Chamber of Textile Engineers. |
| Databáze: | OpenAIRE |
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