废旧毛/丝/棉混纺面料的组分分析及其剥色工艺

为提高废旧纺织品的利用率,同时降低染料对回收方法和回收工艺的影响,分析了废旧混纺面料的组分,并采用H₂O₂/柠檬酸体系对面料进行剥色处理,通过单因素法优化剥色工艺,探讨了H₂O₂、柠檬酸、Na₂SiO₃、JFC质量浓度以及pH值、温度、时间等参数对面料白度和断裂强力的影响。结果表明:废旧混纺面料由羊毛、蚕丝和棉组成,且棉、丝、毛的混纺比为75/20/5;最优剥色工艺条件为:H₂O₂质量浓度10 g/L,柠檬酸质量浓度2 g/L,pH值6,温度80 ℃,时间80 min,Na₂SiO₃质量浓度1.2 g/L,JFC质量浓度2 g/L,浴比1∶40;在最优剥色工艺条件下,废旧毛/丝/棉混纺面料的白度为54.27%,断裂强力为410.17 cN。

Composition analysis and stripping process of waste wool/silk/cotton blended fabric

In order to improve the utilization rate of waste textiles and reduce the influence of dyes on recycling methods and processes, the compositions of waste blended fabrics were analyzed. The fabric was stripped by an hydrogen peroxide/citric acid system. The stripping process was optimized by a single factor method. The influences of hydrogen peroxide mass concentration, citric acid mass concentration, sodium silicate mass concentration, JFC mass concentration, pH value, temperature, time and other parameters on the whiteness and breaking strength of the fabric were discussed. The results show that the waste blended fabric consists of wool, silk and cotton, and the blending ratio of cotton to silk to wool is 75/20/5. The optimum stripping process is hydrogen peroxide mass concentration of 10 g/L, citric acid mass concentration of 2 g/L, pH value of 6, temperature of 80 ℃, time of 80 min, sodium silicate mass concentration of 1.2 g/L, JFC mass concentration of 2 g/L, and bath ratio of 1∶40. Under the conditions of optimal stripping process, the whiteness of waste wool/silk/cotton blended fabric is 54.27%, and the breaking strength is 410.17 cN.