天然彩色棉纤维紫外-可见漫反射光谱特性初探

Characteristics of UV-visible Diffuse Reflectance Spectrum of Naturally Colored Cotton Fiber

天然彩色棉含有的天然色素赋予了该种纤维特有光谱学特性。本研究通过对天然彩色棉及染色棉进行光谱分析,发现用紫外-可见漫反射光谱能有效鉴别天然彩色棉纤维与其颜色基本一致的染色棉,其反射光谱存在明显的区别。另外,各地天然彩色棉的紫外-可见漫反射光谱曲线趋势基本一致,但由于颜色差异,反射率也存在一定差异。因此,紫外-可见漫反射光谱检测为鉴别天然彩色棉纤维提供了一种新的方法。

The natural pigment contained in naturally colored cotton endows some specific spectroscopy characteristics for this kind of fibers. Based on the spectral analysis of naturally colored cotton and dyed cotton, it was found that naturally colored cotton fiber and dyed cotton with basically consistent color could be effectively distinguished by UV-visible diffuse reflectance spectrum （UV-Vis DRS）, and that the reflection spectrum had significant differences. Besides, the curvilinear trend of UV-Vis DRS of naturally colored cotton in each place was basically consistent. But due to the differences in the color, the reflectivity also had certain differences. Thus, UV-Vis DRS detection provides a new method for the identification of naturally colored cotton fiber.