枇杷叶色素提取及其棉织物功能改性应用

Pigment extraction from loquat leaves as natural dye for functional modification of cotton fabric

采用红外染色小样机提取枇杷叶中的天然色素,探索提取温度、提取浓度、提取时间对枇杷叶色素溶液抗氧化性和紫外光吸收能力的影响。将提取液用于棉织物的功能整理,评价了整理后棉织物的抗氧化性和抗紫外性能。最佳提取工艺为:枇杷叶质量浓度50g/L,提取温度110℃,提取时间2.0h。稀释250倍后提取液ABTS*自由基的清除率可达39.4%,且表现出优异的紫外光吸收能力。试验结果表明,用枇杷叶提取液整理的棉织物具有一定的抗氧化性和抗紫外性能。

The natural pigment in loquat leaves is extracted by infrared dyeing machine. The effects of extract temperature, extract concentration and extract time on the antioxidant activity and UV absorption capacity of loquat pigment solution are explored. The extracts are used for functional finishing of cotton fabrics and the antioxidant activity and anti-ultraviolet of treated cotton fabrics are tested. The optimum finishing process is as follow: loquat leaf 50 g/L, extraction at 110 ℃ for 2 h. The ABTS+radical scavenging activity of 250 times diluted extract can reach 39.4%, and the extract exhibits excellent ultraviolet light absorption ability. The test results show that the cotton fabric finished with loquat leaf extract has certain antioxidant and anti-UV function.