Elemental composition, physical dimensions (length and apparent diameter), and crystallinity of different types of naturally colored cotton (NCCs) fibers from Peru were investigated using a CHNS organic elemental analyzer, optical microscopy and X-Ray Diffraction (XRD). Spectroscopic studies involving Fourier Transform Infrared Spectroscopy and X-Ray photoelectron spectroscopy (XPS) were conducted; and the thermal stability of cotton samples were also investigated. Results from organic elemental analyzer and XPS showed that cotton samples contain mainly carbon, oxygen and hydrogen, but darker color samples also presented nitrogen. It was also found that the white cotton sample exhibited the longest fibers whereas the darker color samples showed the shortest values in length. Interestingly, the crystallinity seems also decrease with color intensity of NCCs. Finally, the thermal stability of white cotton fibers was similar to those obtained for the NCCs.

使用CHNS有机元素分析仪，光学显微镜和X射线衍射（XRD）研究了秘鲁不同类型的天然彩色棉（NCC）纤维的元素组成，物理尺寸（长度和表观直径）和结晶度。进行了涉及傅立叶变换红外光谱和X射线光电子能谱（XPS）的光谱研究。并对棉样品的热稳定性进行了研究。有机元素分析仪和XPS的结果表明，棉花样品中主要含有碳，氧和氢，而较深颜色的样品中还含有氮。还发现白色棉样品显示出最长的纤维，而较深颜色的样品显示出最短的长度。有趣的是，结晶度似乎也随着NCC的颜色强度而降低。最后，白棉纤维的热稳定性与NCC相似。