In situ photoreduction of Ag⁺-ions on the surface of titania nanotubes deposited on cotton and cotton/PET fabrics

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• 作者：Milica Milošević ; Zoran Šaponjić ; Tim Nunney ; Christopher Deeks…
• 关键词：TiO2/Ag nanocrystals ; Photoreduction ; Cotton ; Cotton/PET ; Antibacterial activity ; UV protection
• 刊名：Cellulose
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：24
• 期：3
• 页码：1597-1610
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Bioorganic Chemistry; Physical Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer Netherlands
• ISSN：1572-882X
• 卷排序：24

文摘

This study discusses the possibility of in situ photoreduction of Ag+-ions on the surface of titania nanotubes (TNTs) deposited on the cotton and cotton/PET fabrics in the presence of amino acid alanine and methyl alcohol. TNTs were synthetized by hydrothermal method. The proposed interaction between titania, alanine and Ag+-ions was based on the results obtained by FTIR measurements. In order to enhance the binding efficiency between TNTs and fibers, the fabrics were previously impregnated with polyethyleneimine. The presence of TNT/Ag nanocrystals on the surface of fibers was proved by SEM, AAS, XRD and XPS. Larger amount of silver was detected on the cotton fabric. Fabricated TiO₂/Ag nanocrystals provided maximum reduction of bacteria E. coli which was preserved after five washing cycles despite significant release of silver. The perspiration fastness tests indicated that silver release did not depend on pH. The presence of TNT/Ag nanocrystals imparted maximum UV protection to fabrics.