活性染料染色棉织物的水溶液浸渍光催化剥色

针对纺织品传统剥色工艺中化学品消耗量大、能耗高、环境污染严重等问题,采用光催化技术研发了活性染料染色棉织物的水溶液浸渍光催化(即UV/H2O体系)剥色方法,探讨了水溶液中pH值、温度和剥色时间对剥色率和织物强力的影响,并通过红外光谱仪和扫描电子显微镜对剥色前后棉纤维结构及表面形态进行了分析。研究结果表明:采用UV/H2O体系浸渍剥色法可在活性染料染色棉织物上获得良好的剥色效果;在溶液pH值为6,剥色温度为20℃及剥色处理时间为40 min的条件下,活性染色棉织物(1%(o.m.f)活性染料M-3BE)的剥色率能达到88%,其强力保留率达到93%;与染色样相比,UV/H2O体系中短时间的光催化浸渍剥色对棉纤维的化学结构、表面形态影响相对较小。

Photocatalytic color stripping of cotton fabric dyed with reactive dye by employing UV/H2O systerm

A novel method for color stripping of cotton fabric dyed with reactive dye was developed by employing photocatalysis technology and a dipping manner in water system, named as the UV/H2 O system, in order to resolve the problems about the high consumptions of chemicals and energy, as well as serious environmental pollution during conventional color stripping in textile industry. The color stripping parameters such as solution pH value, temperature, stripping duration, and their influences on the color stripping efficiency, tensile strength of cotton fabric were investigated. Moreover, the influences of stripping processes on the structure and morphology of cotton fibers were also investigated by infrared spectroscope and scanning electron microscope analysis. The results demonstrate that an excellent color stripping efficiency is achieved by utilizing photocatalytic color stripping method with a dipping manner in UV/H2 O system. Moreover, a color stripping efficiency as high as 88% for cotton fabric dyed with reactive dye M-3BE (1% (o. m. f)) along with a remained tensile strength about 93% is achieved under optimized conditions of solution with pH of 6 at 20 ℃ and a duration of 40 min. In comparison with colored sample, less influence on the chemical and morphology structures is observed by employing a relative short photocatalytic color stripping duration with the dipping manner in the UV/H2 O system.