This work describes the fluorescence‐indicating function to trace acid gases of polyethylene terephthalate (PET) nano‐porous luminescence fibers (PNPLFs) through the analysis of correlation between the concentration of acid gas and fluorescence intensity of organic rare earth complexes dispersed uniformly in the PET nano‐porous structured fibers. The porous structure and large specific surface area of the PET nano‐fibers prepared through electrospinning technology offer the strong adhesive force and good absorption efficiency of PET nano‐porous fibers to acid gases. The fast response ability of benzoic acid organic rare earth complexes to pH value gives the PET nano‐porous luminescence fibers fluorescence‐indicating function to acid gas. Under dry state and in situ conditions, the fluorescence‐indicating to acid gases of PET nano‐porous luminescence fibers can be completed in 10 s. The precise value is 1 ppm. At the same time, repeated cycling experiments show that the PET nano‐porous luminescence fibers have good recycling property, and the recycling life can increase 40‐fold. Coupled with the good mechanical performances that the breaking strength achieves 121.6 cN, the PET nano‐porous luminescence fibers have better potential in the fluorescence‐indicating to acid gases.

中文翻译：

---

用于指示酸性气体的PET纳米多孔发光纤维的结构和性能

这项工作通过分析酸性气体的浓度与均匀分散在PET中的有机稀土配合物的荧光强度之间的相关性来描述荧光指示功能，以追踪聚对苯二甲酸乙二醇酯（PET）纳米多孔发光纤维（PNPLFs）中的酸性气体。纳米多孔结构纤维。通过静电纺丝技术制备的PET纳米纤维的多孔结构和大的比表面积，为PET纳米多孔纤维对酸性气体提供了强大的粘合力和良好的吸收效率。苯甲酸有机稀土配合物对pH值的快速响应能力使PET纳米多孔发光纤维对酸性气体具有荧光指示功能。在干燥状态和原位条件下，PET纳米多孔发光纤维对酸性气体的荧光指示可以在10 s内完成。精确值为1 ppm。同时，重复循环实验表明，PET纳米多孔发光纤维具有良好的回收利用性能，回收利用寿命可以增加40倍。结合良好的机械性能（断裂强度达到121.6 cN），PET纳米多孔发光纤维在荧光指示酸性气体方面具有更好的潜力。