聚乳酸织物载体染色性能

Dyeing properties of polylactic acid fabric by carrier dyeing method

针对分散染料在常压下染色聚乳酸(PLA)织物得色浅,而高温高压染色织物强力损伤大的问题,采用载体染色法,研究了载体种类、载体用量、染色温度和时间等因素对PLA织物染色性能的影响。借助扫描电子显微镜和X射线衍射仪对染色纤维进行了表征,并分析了最佳工艺下分散染料在PLA织物上的染色性能。结果表明:在载体90BHC质量分数为0. 25%、染料分散红SE-3B用量为2%(o.w.f)、温度为90℃、保温时间40 min的条件下,PLA织物表观色深值(K/S值)可超过高温高压染色的效果(K/S值为23. 21),PLA织物顶破强力损伤较小(下降2. 7%);纤维表面没有受到损伤,同时染色过程对纤维晶体形态没有影响;该染色方法获得的PLA织物透染性较好,耐日晒色牢度和耐皂洗色牢度优良。

In order to solve the shallow coloration of polylactic acid(PLA)dyed fabrics under normal pressure and the damage of fabrics dyed under high temperature and pressure,the influence of dyeing factors such as carrier type and dosage and dyeing temperature on dyeing properties of PLA fabrics were investigated by carrier dyeing method.By analyzing the scanning electro microscopy and X-ray diffraction of the dyed fabric,the dyeing properties of disperse dyes on PLA fabrics under optimum conditions were studied.It is found that the apparent color depth value(K/S value)of PLA fabric can reach the same effect as high temperature and pressure dyeing(K/S value is 23.21)under the conditions of the carrier(90BHC,0.25%),disperse red SE-3B(2%o.w.f)and temperature of 90℃and holding for 40 min,while the burst strength loss of fabric is lower(decreased 2.7%).The fiber surface is not damaged,and the dyeing process has no effect on the crystal morphology of the fiber.The dyeing properties of disperse dyes on PLA fabrics were studied.The fiber-striping test shows that the PLA fabrics obtained by this dyeing method is better in dye penetration.The fastness to sunlight and color fastness to soaping shows that the fastness of disperse dyes on PLA fabrics is excellent.