莱赛尔纤维与铜氨纤维定性分析差异研究

Differences of Qualitative Analysis between Lyocell and Cuprammonium Rayon

由于莱赛尔纤维与铜氨纤维均属于再生纤维素纤维,且显微镜下纤维形态、燃烧现象、基本化学溶解性能、红外光谱特征基本一致,通过常规的定性鉴别方法难以对二者进行准确区分。文章通过分析莱赛尔纤维和铜氨纤维在理化性能方面的细微差异,综合利用铜氨溶液溶解测试、锡拉着色剂显色试验、铜丝火焰呈色反应测试展开对比试验。结果表明,该方法可以准确地对莱赛尔纤维与铜氨纤维进行定性鉴别分析。

It is difficult to accurately distinguish between lyocell fibers and cuprammonia fibers by conventional qualitative identification methods,because both of the two fibers belong to regenerated cellulose fibers.In addition,the fiber morphology,combustion phenomenon,basic chemical solubility and infrared spectrum characteristics under the microscope are basically the same.By analyzing the subtle differences in physical and chemical properties of lyocell fibers and cupro fibers,the article comprehensively uses ammoniacal copper solution dissolution test,shirlastains color test,and copper wire flame color reaction test to carry out comparative tests.The method can accurately identify and analyze lyocell fibers and cuprammonia fibers.