纳米银的可控制备及对棉织物的抗菌整理

利用改性聚酰胺超支化聚合物（PNP）在水溶液中制备纳米银，探讨了其还原、控制制备纳米银的机理，研究了所制备的纳米银水溶液的抗菌性能，并利用PNP在棉织物中原位控制生成纳米银，以实现对棉织物的抗菌整理。结果表明：PNP中的氨基能够主动诱捕、还原银离子，并通过PNP的分子网络结构对纳米银的生成起控制作用。通过调节银离子的量，制备了平均粒径分别为13.23、4.34、2.66 nm的纳米银水溶液，所制备的纳米银水溶液最小抑菌浓度为2 mg/L。利用PNP原位控制生成纳米银整理的棉织物具有优异的抗菌性能，其对金黄色葡萄球菌和大肠杆菌的抑菌率均在99 %以上，并具有优异的耐洗牢度。

Size controlled synthesis of silver nanoparticles and their application to antibacterial finishing of cotton fabrics

This paper describes a strategy of size controlled synthesis of silver nanoparticles by a modified polyamide hyperbranched polymer (PNP). The mechanism of this process was proposed in detail. The antibacterial property of prepared silver nanoparticles aqueous solution was studied. Then the PNP was utilized to in situ fabricate silver nanoparticles in cotton fabric for its antibacterial finishing. The results indicated that amino groups in the PNP act as an important role during the synthesis of silver nanoparticles which can entrap silver ions and reduced them to generate silver nanoparticles under the control of molecular network structure of PNP. The silver nanoparticles with average size at 13.23, 4.34 and 2.66 nm were synthesized by adjust the molar ratio between silver ions and amino groups of PNP. The minimum inhibitory concentration (MIC) of prepared silver nanoparticles aqueous solution was 2 mg/L. The silver nanoparticles in situ generation treated cotton fabrics have excellent antibacterial activities and laundering durability. The bacterial reduction rates of treated cotton fabrics against Staphylococcus aureus and Escherichia coli were all reached above 99%.