Transparent Polyurethane Nanofiber Air Filter for High-Efficiency PM2.5 Capture

Fine particulate matter (PM) has seriously affected human life, such as affecting human health, climate, and ecological environment. Recently, many researchers use electrospinning to prepare nanofiber air filters for effective removal of fine particle matter. However, electrospinning of the polymer fibers onto the window screen uniformly is only achieved in the laboratory, and the realization of industrialization is still very challenging. Here, we report an electrospinning method using a rotating bead spinneret for large-scale electrospinning of thermoplastic polyurethane (TPU) onto conductive mesh with high productivity of 1000 m(2)/day. By changing the concentration of TPU in the polymer solution, PM2.5 removal efficiency of nanofiber-based air filter can be up to 99.654% with good optical transparency of 60%, and the contact angle and the ventilation rate of the nanofiber-based air filter is 128.5 degrees and 3480 mm/s, respectively. After 10 times of filtration, the removal efficiency is only reduced by 1.6%. This transparent air filter based on TPU nanofibers has excellent filtration efficiency and ventilation rate, which can effectively ensure indoor air quality of the residential buildings.

细颗粒物（PM）已严重影响人类生活，例如影响人类健康，气候和生态环境。最近，许多研究人员使用静电纺丝技术来制备纳米纤维空气过滤器，以有效去除细颗粒物。然而，仅在实验室中才能将聚合物纤维均匀地静电纺丝到窗纱上，并且工业化的实现仍然是非常具有挑战性的。在这里，我们报告了一种使用旋转磁珠喷丝头的静电纺丝方法，用于将热塑性聚氨酯（TPU）大规模静电纺丝到导电网片上，生产率高达1000 m（2）/ day。通过改变聚合物溶液中TPU的浓度，纳米纤维基空气过滤器的PM2.5去除率可达到99.654％，良好的光学透明度为60％，纳米纤维基空气的接触角和通风率过滤器分别为128.5度和3480 mm / s。过滤10次后，去除效率仅降低1.6％。这种基于TPU纳米纤维的透明空气过滤器具有出色的过滤效率和通风率，可以有效地确保住宅建筑物的室内空气质量。

Published: 2019

Journal ：NANOSCALE RESEARCH LETTERS

Impact Factor：3.746

Paper link: https://link.springer.com/article/10.1186/s11671-019-3199-0