棉织物的纳米银多功能整理

Nano-silver multifunctional finishing of cotton fabric

摘要:

摘 要：以植物还原剂——金银花提取物和化学还原剂——丙三醇，分别还原硝酸银，制备两种纳米银溶液。采用浸渍法将植物还原法和化学还原法制备的两种纳米银溶液分别对棉织物进行功能整理。利用SEM、EDS、XRD、FTIR分析整理前后棉织物的外观形貌以及结构，并探讨了整理后棉织物的抗紫外性能以及不同洗涤次数后其含银量、色差和抗菌性能的变化。结果表明：纳米银粒子主要通过范德华力吸附在棉纤维的无定形区；与化学还原法相比，植物还原法制备的纳米银粒径减小了约15 nm，植物法整理后的棉织物经过50次洗涤后，织物表面的纳米银吸附量以及色差变化不大，且对大肠杆菌和金黄色葡萄球菌的抑菌率仍旧达到99%以上，具有优异的抗菌性及良好的耐洗涤性能。另外，植物还原法整理的棉织物UPF值达到了36.82，具有较好的抗紫外性能。

Abstract:

Abstract: The plant reducing agent-honeysuckle extract and the chemical reducing agent-glycerol were used to reduce silver nitrate to prepare two kinds of nano silver solutions. Then, the two nano-silver solutions prepared by the plant reduction method and the chemical reduction method were used for functional finishing of the cotton fabrics by the dipping method. The morphology and structure of cotton fabrics before and after finishing were analyzed by SEM, EDS, XRD, and FTIR. The anti-ultraviolet properties of silver-loaded cotton fabrics and the changes in silver content, color difference, and antibacterial performance after different washing times were discussed. The results show that the nano-silver particles were mainly adsorbed on the amorphous region of cotton fibers by Van der Waals' force. Compared with the chemical reduction method, the particle size of nano-silver prepared by the plant reduction method decreased by about 15 nm. After 50 times of washing, the adsorption amount and color difference of nano silver on the surface of the cotton fabric treated by plant method did not change much, and the antibacterial rate against E. coli and S. aureus still reached more than 99%. It had excellent antibacterial properties and good washing resistance. In addition, the UPF value of the cotton fabric treated by the plant reduction method reached 36.82, which had good UV resistance.