Green Synthesis of Organo-Montmorillonite/Silver Nanocomposites on Dyed Cotton with Vat Dyes to Achieve Biocompatible Antibacterial Properties on Fashionable Clothing

ABSTRACT

This study proposes a green and easy route for synthesizing clay/silver nanocomposite on denim fabric which can instantaneously discolor the garment and produce antibacterial effects during a one-step process with minimal toxicity to humans. Synthesis of organo-Montmorillonite/silver nanocomposite was carried out by reducing silver nitrate to nanosilver in the presence of a reducing agent and its attachment to opened layers of clay particles throughout a one-step process. Colorimetric properties were examined using L*a*b* values to understand the changes in denim color after the action of organo-montmorillonite (O-MMt) and nanosilver, which confirmed the dye removal action of clay/silver nanocomposite. UV-visible data proved the successful synthesis of nanosilver in addition to the indigo dye removal from the remaining effluent by exhibiting no peaks at 406 nm and 601.2 nm. SEM and TEM images depicted the shape and position of opened O-MMt layers, silver nanoparticles, and O-MMt/silver nanocomposites, verified by EDX, XRD, and FTIR data. Antibacterial examination showed noticeable results with maximum effectiveness of 100% against the growth of Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria with acceptable cell viability of 94% with no detectable changes in cell shape and size.

摘要

本研究提出了一种在牛仔布织物上合成粘土/银纳米复合材料的绿色且简单的方法, 用于牛仔布石材洗涤应用, 该方法可在一步过程中瞬间使衣服变色并对处理后的产品产生抗菌效果, 且对人体的毒性最小. 有机蒙脱土/银纳米复合材料的合成是通过在还原剂存在下将硝酸银还原为纳米银, 并通过一步法将其附着到粘土颗粒的开放层上进行的. 使用L*a*b*值检查色度特性, 以了解有机蒙脱土 (O-MMt) 和纳米银作用后牛仔布颜色的变化, 这证实了粘土/银纳米复合材料的染料去除作用. 紫外-可见光谱数据证明, 除了从剩余废水中去除靛蓝染料外, 还成功合成了纳米银, 在406 nm和601.2 nm处未出现峰值. SEM和TEM图像描述了开放的O-MMt层, 银纳米颗粒和O-MMt/银纳米复合材料的形状和位置, 并通过EDX, XRD和FTIR数据进行了验证. 抗菌检查显示出显著的结果, 对革兰氏阴性大肠杆菌和革兰氏阳性金黄色葡萄球菌的生长具有最高100%的有效性, 可接受的细胞存活率高达94%, 且细胞形状和大小无明显变化.

KEYWORDS:

• Old-look cellulosic denim
• organo-montmorillonite/silver nanocomposite
• antibacterial activity
• fashionable clothes
• clean effluent; SARS-CoV-2 antiviral finishing

关键词:

• 老式纤维素牛仔布
• 有机蒙脱土/银纳米复合材料
• 抗菌活性
• 时尚服装
• 清洁废水

Highlights

• A green method to create old-looked cotton denim garment with antibacterial activity.

• Synthesizing montmorillonite/silver nanocomposites during a one-step process

• Low water required with ability to easily replace the conventional methods

Disclosure statement

No potential conflict of interest was reported by the author(s).