微生物合成纳米灵菌红素及其对羊毛织物抗菌染色

为推动微生物染料在纺织染色领域的应用，通过在发酵液中添加非离子表面活性剂，使用粘质沙雷氏菌发酵制备得到纳米灵菌红素分散液，并以此作为染液对羊毛织物染色。分别探究温度、时间、染液pH对染色效果的影响，并对染色羊毛织物的抗菌性进行研究。结果表明：微生物发酵制备的纳米灵菌红素分散液的平均粒径为285.8 nm，多分散指数为0.193，粒径分布集中，色素浓度为18.3 mg/L；羊毛织物的最优染色温度为90 ℃，最适染色时间为20 min；染液pH 值对羊毛织物的染色效果和抗菌性有显著的影响，当染浴pH 值为2.1 时，染色羊毛织物对金黄色葡萄球菌和大肠杆菌的抑菌率最高，分别为99.1% 和36.6%，染色羊毛织物对金黄色葡萄球菌的抗菌性明显优于大肠杆菌。

Antibacterial dyeing of wool fabric with nano prodigiosins produced by microorganism

In order to promote the application of microbial dyestuff on the textile dyeing field, prodigiosins nano-dispersion was produced by adding nonionic surfactant to the culture media and fermenting in the presence of Serratia marcescens. Wool fabrics were dyed with the pigment nanosuspension. The influences of dyeing temperature, time and dye bath pH on dyeing effect were investigated. Moreover, the antibacterial property of the dyed wool was studied. The results indicated that the average particle size of nano prodigiosins is 285.8 nm and the size distributon is centralized since the despersity index is 0.193. The pigment concentration is 18.3 mg/L. The optimum dyeing temperature and time are 90 ℃ for 20 min, reapectively. In addition, the dyeing effect and antibacterial activity of dyed wool are influenced significantly by the pH value of dye liquor. When pH is 2.1, the dyed wool fabric possessed the highest antibacterial rate of 99.1% and 36.6% against Staphylococcus aureus and Escherichia coli, respectively. The antibacterial property of dyed wool against Staphylococcus aureus is distinctly superior to Escherichia coli.