TPU纳米纤维膜对典型内分泌干扰素的吸附去除

利用静电纺丝技术成功制备了热塑性聚氨酯（TPU）纳米纤维膜（TPU-NFM），通过扫描电镜、傅里叶变换红外光谱对TPU-NFM进行表征，并设置了动力学实验和热力学实验研究TPU-NFM对BPA、EE2的吸附性能及吸附机理，探讨了环境条件对膜吸附的影响.结果表明：静电纺丝TPU纳米纤维光滑纤细、直径均匀、有良好的网状结构以及丰富的表层基团.吸附实验表明TPU-NFM对BPA的吸附过程符合Langmuir模型和准二级动力学模型，吸附过程中单分子层的化学吸附占主导作用，最大吸附容量q_max=45.48mg/g，最大吸附速率k₂=0.754g/（mg·h）.对EE2的吸附过程符合Langmuir模型和Elovich模型，偏向各吸附机理综合作用的结果，其q_max=38.22mg/g，初始吸附速率a=5.355mg/（g·h）.此外，TPU-NFM对环境中盐度以及pH值的敏感度不高.

Adsorption behaviors of typical endocrine disrupting chemicals by TPU nanofiber membrane

A thermoplastic polyurethane nanofiber membrane (TPU-NFM) was successfully synthesized via electrospinning technology. The characteristics of TPU-NFM were evaluated by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR). The adsorption capacity and adsorption mechanism of bisphenol A (BPA) and 17α-ethylnyestradiol (EE2) onto TPU-NFM were examined by thermodynamic and kinetic experiment. Meanwhile, the effect of environmental factors on membrane adsorption was also carried out. The results showed that TPU-NFM were smooth, uniform in diameter, unique ordered network structure and rich surface functional groups. The adsorption process of BPA onto TPU-NFM could be described by Langmuir adsorption isotherm model and pseudo-second-order adsorption kinetic model. It showed that chemical adsorption of monolayer plays a dominant role in the adsorption process. The maximum adsorption capacity (q_max) was 45.48mg/g, and the maximum adsorption rate (k₂) was 0.754g/(mg·h). The adsorption process of EE2 onto TPU-NFM could be fitted to the Langmuir adsorption isotherm model and Elovich adsorption kinetic model, the q_max was 38.22mg/g and a was 5.355mg/(g·h), It proved that the adsorption of EE2 onto TPU-NFM comprehensive results of several adsorption mechanisms. In addition, TPU-NFM is not sensitive to salinity and pH in the environment.