Department of Textile Engineering, Mehran University of Engineering and Technology, Jamshoro, Sindh, Pakistan.
Carbohydr Polym. 2013 Jul 1;96(1):326-31. doi: 10.1016/j.carbpol.2013.04.004. Epub 2013 Apr 12.
The antibacterial activity of cotton fabric was studied by using chitosan/AgCl-TiO2 colloid. Different blend ratios of chitosan to AgCl-TiO2 colloid were used to investigate the efficacy of antibacterial activity against Staphylococcus aureus (gram positive) and Escherichia coli (gram negative) and its effect on physical properties of cotton fabric. Our study shows that the combination of chitosan with AgCl-TiO2 colloid produced better antibacterial activity than the fabric treated without chitosan; 100% bacterial reduction against S. aureus and E. coli obtained with chitosan/AgCl-TiO2 colloid at concentrations of 4 g/L and 10 g/L respectively. Moreover, the treated cotton indicates improved tensile strength and wrinkle recovery angle (WRA). Increasing chitosan concentration slightly affected the fabric stiffness and whiteness. The treated cotton fabrics were further characterized by Fourier Transform Infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM), energy dispersive X-ray (EDX) and wide angle X-ray (WAXD). We can expect a direct industrial application of our proposed work because it is simple one go pad-dry-cure method and the low cost commercial grades of chitosan and AgCl-TiO2 are conveniently available in the market.
本研究采用壳聚糖/AgCl-TiO2 胶体对棉织物的抗菌活性进行了研究。采用不同比例的壳聚糖与 AgCl-TiO2 胶体混合，以研究其对金黄色葡萄球菌（革兰氏阳性菌）和大肠杆菌（革兰氏阴性菌）的抗菌活性效果及其对棉织物物理性能的影响。我们的研究表明，壳聚糖与 AgCl-TiO2 胶体的结合比未经壳聚糖处理的织物具有更好的抗菌活性；用浓度为 4 g/L 和 10 g/L 的壳聚糖/AgCl-TiO2 胶体分别可以获得对金黄色葡萄球菌和大肠杆菌 100%的细菌减少率。此外，处理后的棉织物的拉伸强度和折皱回复角（WRA）得到了提高。增加壳聚糖浓度会略微影响织物的刚性和白度。用傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、能谱（EDX）和广角 X 射线（WAXD）对处理后的棉织物进行了进一步的表征。我们可以预期我们提出的工作可以直接应用于工业，因为它是一种简单的一浸一轧一烘法，并且市场上方便获得商业级别的壳聚糖和 AgCl-TiO2。
