媒染剂对茶色素染色棉纤维性能的影响  

Effect of mordant agents on cotton fibers dyed with tea colorant

作　　者：李凤艳[1] 刘丽华[2] 

机构地区：[1]天津工业大学纺织学院,天津300160 [2]中国国际贸易促进委员会纺织行业分会,北京100742

出　　处：《纺织学报》2011年第8期62-66,共5页Journal of Textile Research

摘　　要：选择单宁酸、醋酸锌和硫酸铝钾为媒染剂,采取后媒染的方式,用绿茶萃取液对棉纤维进行染色,研究染浴pH值、媒染剂用量对棉纤维染色性能的影响,并以染色纤维在水浴中放置不同时间后残液的透光率下降率表示纤维的染色牢度。利用TM-1000扫描电子显微镜表征染色前后纤维的微观结构,并测试媒染前后纤维的力学性能。结果表明:醋酸锌作为媒染剂,其染色纤维相应的K/S值最大,但染色牢度相对较差;单宁酸染色后纤维的表面仍清晰可见棉纤维特有的沟槽结构,醋酸锌和硫酸铝钾染色后的纤维表面沉积了一层不溶性络合物;媒染后棉纤维的断裂强力略有下降,酸性条件下染色下降更为明显,断裂伸长率呈现一定幅度的上升趋势。The aqueous tea solution extracted from green tea was used to dye cotton fibers by post-mordanting method with tannic acid,Zn（CH3COOH）2,and KAl（SO4）2 as mordant agents.The effects of pH value of the dye bath and mordant concentration on the dyeability of cotton were analyzed.The dyed cotton fibers were placed in a water bath for different durations and the transmittance decrease percentage of the residual liquor in the bath was tested and used as the indicator of color fastness of the dyed cotton fibers.TM-1000 SEM was used to characterize the microstructure of the cotton samples before and after dyeing,as well as testing their mechanical properties.The results showed that when Zn（CH3COOH）2 was used as the mordant,the dyed cotton exhibited the maximum K/S value but inferior color fastness.The typical groove structure was clearly seen on the surface of the dyed cotton with tannic acid as the mordant.Insoluble complex was deposited on the surface of the dyed cotton with Zn（CH3COOH）2 and KAl（SO4）2 as the mordant.When compared with the control cotton,the breaking strength of the mordant dyed cotton displayed decreased slightly,especially when dyeing was performed under acid conditions.However,the breaking elongation of the mordant dyed cotton showed increased a little.

关 键 词：天然染料 茶多酚 后媒染 棉纤维 

分 类 号：TS193.6[轻工技术与工程—纺织化学与染整工程]