Cellulose acetate (CA) fibers were obtained by electrospinning and their properties analyzed by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction (XRD), differential scanning calorimeter (DSC) and thermogravimetric analysis. The effect of the polymer concentration on crystallinity and fiber diameter of the obtained material was studied by DSC. The application of the pure polymeric fibers to the discoloration of methylene blue (MB) aqueous solutions in dark and under sunlight irradiation was evaluated with UV–Vis absorption and photoluminescence spectroscopies. Also, the photodegradation of the dye was compared using CA powder and fibers under UV irradiation. The results revealed that the dye molecule discoloration with CA fibers mesh was higher under sunlight irradiation than in dark conditions. The maximum absorption band (664 nm) of MB decreased with the time in the absence and presence of polymer under either solar natural exposition or UV irradiation. The dye organic discoloration efficiency obtained by using electrospun CA mesh was 28% and 98% in dark conditions and under natural solar illumination, respectively. The FTIR showed the interaction of dye organic or sub-products generated with the polymeric component. This work provides a simple method for the discoloration of wastewater effluents using microfibers composed of only one abundant polymeric material, allowing the reduction in the amount of material needed and therefore the manufacturing costs of the adsorbent material.

中文翻译：

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电纺醋酸纤维素纤维用于自然阳光下亚甲基蓝溶液的光脱色

通过静电纺丝获得醋酸纤维素 (CA) 纤维，并通过扫描电子显微镜、傅里叶变换红外光谱、X 射线衍射 (XRD)、差示扫描量热仪 (DSC) 和热重分析对其性能进行分析。通过DSC研究聚合物浓度对所得材料的结晶度和纤维直径的影响。用紫外-可见吸收和光致发光光谱评估了纯聚合物纤维在黑暗和阳光照射下亚甲基蓝 (MB) 水溶液变色的应用。此外，还比较了在紫外线照射下使用 CA 粉末和纤维对染料的光降解。结果表明，在阳光照射下，CA 纤维网的染料分子变色比在黑暗条件下更高。MB 的最大吸收带 (664 nm) 在没有和存在聚合物的情况下在太阳自然暴露或紫外线照射下随着时间的推移而减少。在黑暗条件下和自然日光照射下，使用电纺CA网获得的染料有机变色效率分别为28%和98%。FTIR 显示有机染料或副产物与聚合物组分的相互作用。这项工作提供了一种使用仅由一种丰富的聚合物材料组成的微纤维对废水进行变色的简单方法，从而减少了所需材料的数量，从而降低了吸附材料的制造成本。在黑暗条件下和自然日光照射下，使用电纺CA网获得的染料有机变色效率分别为28%和98%。FTIR 显示有机染料或副产物与聚合物组分的相互作用。这项工作提供了一种使用仅由一种丰富的聚合物材料组成的微纤维对废水进行变色的简单方法，从而减少了所需材料的数量，从而降低了吸附材料的制造成本。在黑暗条件下和自然日光照射下，使用电纺CA网获得的染料有机变色效率分别为28%和98%。FTIR 显示有机染料或副产物与聚合物组分的相互作用。这项工作提供了一种使用仅由一种丰富的聚合物材料组成的微纤维对废水进行变色的简单方法，从而减少了所需材料的数量，从而降低了吸附材料的制造成本。