反应性荧光增白剂RF-1对棉纤维的应用性能研究

Study on Application Performance of Reaction Fluorescent Whitening Agent RF-1 on Cotton Fiber

针对现有荧光增白剂在使用时耐湿处理牢度差的问题,以自制的反应性荧光增白剂RF-1为研究对象,通过紫外吸收-荧光发射光谱探究其增白机理。采用4因素3水平的正交试验优化其对棉织物的应用工艺,并以白度为评价指标进一步优化了RF-1的用量,最终确定其最优工艺为:RF-1 0.5%owf,元明粉60g/L,pH 10,染色温度70℃,染色时间60min。通过DMF剥色和耐洗牢度测试,证实RF-1对棉纤维具有反应性,且具有良好的耐水洗牢度;将RF-1和活性染料同浴染色,证明两者存在竞染关系。

The existing fluorescent whitening agent has poor moisture-proof fastness. For this problem, home-made fluorescent whitening agent RF-1 was used as the object of study, and its whitening mechanism was explored through ultraviolet absorption - fluorescence emission spectrum. The orthogonal test involving four factors and three levels was applied to optimize its application process for cotton fabrics. Besides, whiteness was used as the evaluation index to further optimize the dosage of RF-1. Ultimately, the optimal process was confirmed as follows： RF-1 0. 5%owf, anhydrous sodium sulphate 60 g/L, pH 10,dyeing temperature 70 ℃,and staining time 60 min. The DMF stripping and wash fastness tests verify that RF-1 has a reaction on the cotton fiber, and has good washing fastness. The one-bath dyeing of RF-1 and reactive dyes proves competitive dyeing relationship between the two.