大麻纤维的芬顿法脱胶及其性能

为减少纺织工业中脱胶废液的强碱强酸造成环境的污染,采用芬顿法对大麻纤维进行脱胶处理。以残胶率、断裂强力、直径、白度及纤维长度为指标,探讨pH值、七水合硫酸亚铁浓度、双氧水浓度和温度对大麻纤维脱胶效果的影响;借助红外光谱仪和X射线衍射仪分析了大麻纤维的化学结构及结晶度变化,通过扫描电子显微镜观察了大麻纤维的脱胶效果。结果表明:最佳脱胶工艺条件为pH值6.0,七水合硫酸铁质量浓度10 g/L,双氧水质量浓度9 g/L,温度80 ℃,此时脱胶纤维残胶率为10.12％,断裂强力为32.453 cN,直径为29.745 μm,长度为 5.62 cm; 芬顿法可有效去除大麻纤维的胶质。

Degumming of hemp fibers using Fenton method and fiber properties

In order to reduce the environmental pollution caused by the strong alkalinity in the degumming waste liquid in the textile industry, the Fenton method was used to degum the hemp skin fiber. Using residual gum rate, breaking strength, diameter, whiteness and fiber length as indicators, the effects of pH value, ferrous sulfate concentration, hydrogen peroxide concentration and temperature on the effect of hemp degumming process were discussed. The chemical structure and crystallinity changes of hemp fibers were analyzed by infrared spectrometer and X-ray diffraction analyzer, and the degumming effect of hemp fibers was examined by scanning electron microscope. The test results show that the optimum degumming process conditions are pH 6.0, ferrous sulfate mass concentration 10 g/L, hydrogen peroxide mass concentration 9 g/L, and temperature 80 ℃. Under the optimal process, the residual glue rate of the degummed fibers was 10.12％, the breaking strength was 32.453 cN, the fiber diameter was 29.745 μm, and the fiber length was 5.62 cm. It was found that Fenton method can effectively remove the gum of hemp fiber.