棉针织物天然黄酮类复合物染色性能研究

Dyeing Properties of Cotton Knitted Fabrics with Natural Flavonoids Complex

采用水浸提法从苦丁茶及黄芩中提取天然黄酮类物质,并按一定比例将两者复配制得复合物对纯棉针织物进行染色,通过测试浸提液吸收光谱曲线、染后样品K/S值及UPF值优化复合物复配比例,并研究了在最优化复配比例复合物的条件下,纯棉针织物染色时温度、时间、电解质用量及固色剂用量等对织物防紫外线性能的影响。结果表明,复配制得的天然黄酮类复合物均可强烈吸收280~400 nm紫外线,当复配比例为2∶8时,复合物紫外线吸收性能最强;采用复配比例为2∶8的复合物进行染色,最佳染色工艺:80℃染色90 min,氯化钠用量20 g/L,染色后织物具有良好的防紫外线性能;使用无醛固色剂DM-2518提高染色织物耐洗性,织物经30次皂洗后防紫外线性能仍能满足应用要求。

Water extraction method was applied to extract natural flavonoids from broadleaf holly leaf and scutellaria baicalensis.Cotton knitted fabrics were dyed with complex of the above-mentioned two natural flavonoids extractions blended in proportion.Absorption spectrum of different complex,the K/S value and UPF of dyed samples were both measured to optimize the blending ratio.The effect of dyeing process of natural flavonoids complex in best ratio,such as dyeing temperature and duration,amount of sodium chloride and color fixing agent on the anti-ultraviolet properties were analyzed.The results show that strong absorption of UV radiation ranging for280 to 400 nm were observed for natural flavonoids complex blended in different ratio and the best blend ratio was2∶8.The dyeing process of cotton knitted fabrics with 2∶8 complex was optimized as follows:dyeing at 80℃for 90 minutes in the presence of 20 g/L sodium chloride,and the dyed fabrics samples showed anti-ultraviolet properties.Aldehyde-free fixing agent DM-2518 was used to enhance the laundering durability.The fixed samples showed acceptable anti-ultraviolet for application after 30 soap washing cycles.