Zhao Zhihui, Geng Cunzhen, Zhao Xihui, Xue Zhixin, Quan Fengyu, Xia Yanzhi
State Key Laboratory of Bio-Fibers and Eco-Textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China.
Nanomaterials (Basel). 2019 Apr 8;9(4):570. doi: 10.3390/nano9040570.
Fluorescent textile fibres (FTFs) are widely used in many industrial fields. However, in addition to fibres with good fluorescence, fibres with excellent colour controllability, structural stability and appropriate mechanical strength still need to be developed. In this work, CdTe/alginate composite FTFs are prepared by taking advantage of the interactions between CdTe nanocrystals (NCs) and alginate macromolecules via a wet-spinning machine with a CaCl₂ aqueous solution as the coagulation bath. CdTe NCs were chemically fixed in the fibre due to the interactions among surface ligands, macromolecules and coagulators (calcium ions), which ensured the excellent dispersity and good stability of the fibres. Förster resonance energy transfer (FRET) between NCs in the fibre was found to be restricted, which means that the emission colour of the fibres was totally controllable and could be predicted. Other properties of alginate fibres, such as flame retardance and mechanical strength, were also well preserved in the fluorescent fibres. Finally, FTFs showed good selectivity toward trace Hg ions over other metallic ions, and the detection could be identified by the naked eye.
荧光纺织纤维（FTFs）广泛应用于许多工业领域。然而，除了具有良好荧光性的纤维外，仍需要开发具有优异颜色可控性、结构稳定性和适当机械强度的纤维。在这项工作中，利用CdTe纳米晶体（NCs）与海藻酸盐大分子之间的相互作用，通过以CaCl₂水溶液为凝固浴的湿法纺丝机制备了CdTe/海藻酸盐复合FTFs。由于表面配体、大分子和凝固剂（钙离子）之间的相互作用，CdTe NCs被化学固定在纤维中，这确保了纤维具有优异的分散性和良好的稳定性。发现纤维中NCs之间的Förster共振能量转移（FRET）受到限制，这意味着纤维的发射颜色是完全可控的且可以预测。海藻酸盐纤维的其他性能，如阻燃性和机械强度，在荧光纤维中也得到了很好的保留。最后，FTFs对痕量Hg离子表现出优于其他金属离子的良好选择性，并且检测可以通过肉眼识别。
