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Color-changing intensified light-emitting multifunctional textiles via digital printing of biobased flavin

机译：通过数字印刷的Biobased Flavin的颜色变化强化发光多功能纺织品

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Flavin mononucleotide (biobased flavin), widely known as FMN, possesses intrinsic fluorescence characteristics. This study presents a sustainable approach for fabricating color-changing intensified light-emitting textiles using the natural compound FMN via digital printing technologies such as inkjet and chromojet. The FMN based ink formulation was prepared at 5 different concentrations using water and glycerol-based systems and printed on cotton duck white (CD), mercerized cotton (MC), and polyester (PET) textile woven samples. After characterizing the printing inks (viscosity and surface tension), the photophysical and physicochemical properties of the printed textiles were investigated using FTIR, UV/visible spectrophotometry, and fluorimetry. Furthermore, photodegradation properties were studied after irradiation under UV (370 nm) and visible (white) light. Two prominent absorption peaks were observed at around 370 nm and 450 nm on K / S spectral curves because of the functionalization of FMN on the textiles via digital printing along with the highest fluorescence intensities obtained for cotton textiles. Before light irradiation, the printed textiles exhibited greenish-yellow fluorescence at 535 nm for excitation at 370 nm. The fluorescence intensity varied as a function of the FMN concentration and the solvent system (water/glycerol). With 0.8 and 1% of FMN, the fluorescence of the printed textiles persisted even after prolonged light irradiation; however, the fluorescence color shifted from greenish-yellow color to turquoise blue then to white, with the fluorescence quantum efficiency values ( Φ ) increasing from 0.1 to a value as high as 1. Photodegradation products of the FMN with varying fluorescence wavelengths and intensities would explain the results. Thus, a color-changing light-emitting fluorescent textile was obtained after prolonged light irradiation of textile samples printed using biobased flavin. Furthermore, multifunctional properties such as antibacterial properties against E. coli were observed only for the printed cotton textile while increased ultraviolet protection was observed for both cotton and polyester printed fabrics for the high concentration of FMN water-based and glycerol-based formulations. The evaluation of fluorescence properties using digital printing techniques aimed to provide more sustainable solutions, both in terms of minimum use of biobased dye and obtaining the maximum yield.
机译：Flavin单核苷酸（Biobased Flavin）广泛称为FMN，具有内在的荧光特性。本研究介绍了通过喷墨和染色体等数字印刷技术使用天然化合物FMN制造色彩变化的强化发光纺织品的可持续方法。使用水和甘油的系统在5种不同浓度下制备FMN油墨制剂，并在棉鸭白（CD），丝光棉（MC）和聚酯（PET）纺织品编织样品上印刷。在表征印刷油墨（粘度和表面张力）之后，使用FTIR，UV /可见分光光度法和荧光测定来研究印刷纺织品的光学和物理化学性质。此外，在UV（370nm）下照射后研究光降解性能，并可见（白色）光。由于FMN在纺织品上通过数字印刷以及为棉纺织品获得的最高荧光强度，在K / S光谱曲线上观察到两个突出的吸收峰值在K / S光谱曲线上观察到X / S光谱曲线约为450nm。在光线照射之前，印刷纺织品在535nm下在370nm处发出1235nm的绿黄色荧光。荧光强度随着FMN浓度和溶剂系统（水/甘油）而变化。对于0.8和1％的FMN，即使在长时间光照射后，印刷纺织品的荧光也持续存在;然而，荧光从绿色黄色移位到绿松石蓝，然后荧光量子效率值（φ）从0.1增加到高于1的值。FMN的光降解产物具有不同的荧光波长和强度解释结果。因此，在使用Biobased Flavin打印的纺织品样品的延长光照后获得变色的发光荧光纺织品。此外，仅针对印刷的棉纺织品观察到对大肠杆菌的抗菌性质等多功能性质，同时针对棉花和聚酯印刷织物观察到增加的紫外线保护，用于高浓度的FMN水基和基于甘油基制剂。使用数字印刷技术的荧光性能评价旨在提供更可持续的解决方案，无论是最少使用生物化染料并获得最大收率。

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