Effects of oxidizing bleaching agent on degradation and decolorization of textile products

研究了氧化漂白剂对金属化染料染色织物在漂白过程中降解脱色的影响。这是由于漂白剂在水溶液中分解速度加快造成的。原因是织物中的一种金属，特别是铜，催化了漂白剂。研究表明，EDTANa -Mg、单宁酸和氨基酸衍生物氨基酸表面活性剂对漂白剂中染色织物的降解脱色有显著的抵抗作用。用单宁酸预处理，在漂白液中加入EDTANa-Mg或氨基辅助表面活性剂，避免了这一问题。同时还降低了漂白剂的分解速率。据推测，织物中与染料螯合的金属不会被这些材料拉出。这种效果是由于金属和这些材料之间的相互作用，分别。通过光谱测量，EDTANa-Mg、单宁酸和氨基酸分别在染色织物中与铜形成络合物。阴离子表面活性剂，如氨基酸表面活性剂，在家庭洗衣中被广泛应用。适用于染色织物的漂白，避免了漂白过程中的麻烦。因此，我认为氨基酸表面活性剂是实际应用的最佳材料。

Effect of oxidizing bleaching agent on the degradation and decoloring of fabric dyed with metalyzed dye in bleaching process was investigate.The trouble is cause by accelelating of decomposition rate of bleaching agentin aqueous solution.The cause of that was cleared that a metal in the fabric ,especially a copper,catalyzes the bleaching agent. In this study it was cleared that EDTANa -Mg,tannic acid and amino acid surfactant derived from amino acid had a remarkable resisting effect of the degradation and decoloring of dyed fabric in bleaching agent. Pretreating with tannic acid , adding EDTANa-Mg or amino aid surfactant to bleaching solution prevented this trouble.And also decomposition rate of bleaching agent was depressed by these materials. It was assumed that a metal chelated with the dye in the fabric was not pulled out by these materials.the effect of that was due to an interaction betweeen the metal and these materials, respectively. Based on the spectroscopic measurements, EDTANa-Mg,tannic acid and amino acid is complexes with a copper in the dyed fabric, respectively. Anionic acid surfactant,such as amino acid surfactant,is widely used as detergent in home laundry.It can be applied to bleach the dyed fabric in order to protect the trouble in bleaching process.I think,, threfore, amino acid surfactant is the best materials for practical use.