A novel cellulose acetate/poly (ionic liquid) composite air filter

Global air pollution poses a serious risk to human health. Among the variety of types of pollution, inhalable particulate matter (PM 2.5) is proved to be extremely harmful. In this work, a simple method was designed to synthesize a novel air filter, which composed of cellulose acetate and poly (ionic liquids) by using the technique of macromolecular design and electrostatic spinning process. The introduction of poly (ionic liquids) effectively reduced the diameter of fibers and thus obtains nano-fibrous filters. The removal rate of PM 10 and PM 2.5 particle by the filters reached 99.65% and 97.94%, respectively. Furthermore, the filters exhibited excellent antibacterial properties against Escherichia coli and Staphylococcus aureus, and no obvious cytotoxicity was observed in vitro culturing cell. After multiple recycling, the filters still maintained excellent antimicrobial properties and fibrous morphology due to the stable covalent bonds between cellulose acetate and poly (ionic liquids). This is a novel strategy to prepare high-quality air filters, which have great potential applications in air purification. Graphic abstract We fabricated a kind of green electrospinning material with stable antibacterial properties through organic synthesis and molecular design. The introduction of poly (ionic liquids) effectively reduces the diameter of fibers and thus obtains nano-fibrous filters. The removal rate of PM 10 and PM 2.5 particle by the filters reached 99.65% and 97.94%, respectively. Furthermore, the filters exhibit excellent antibacterial properties against E. coli and S. aureus, and no obvious cytotoxicity is observed in vitro culturing cell. After multiple recycling, the filters still maintain excellent antimicrobial properties and fibrous morphology.

全球空气污染对人类健康构成严重威胁。在各种类型的污染中，可吸入颗粒物（PM 2.5）被证明是极其有害的。在这项工作中，通过大分子设计和静电纺丝工艺，设计了一种简单的方法来合成由醋酸纤维素和聚（离子液体）组成的新型空气过滤器。聚（离子液体）的引入有效地减小了纤维的直径，因此获得了纳米纤维过滤器。过滤器对PM 10和PM 2.5颗粒的去除率分别达到99.65％和97.94％。此外，滤器对大肠杆菌和金黄色葡萄球菌具有优异的抗菌性能，并且在体外培养细胞中未观察到明显的细胞毒性。经过多次循环使用后，由于醋酸纤维素和聚（离子液体）之间稳定的共价键，过滤器仍保持出色的抗菌性能和纤维形态。这是制备高质量空气过滤器的新颖策略，该空气过滤器在空气净化中具有巨大的潜在应用。图形摘要通过有机合成和分子设计，我们制备了一种具有稳定抗菌性能的绿色静电纺丝材料。聚（离子液体）的引入有效地减小了纤维的直径，从而获得了纳米纤维过滤器。过滤器对PM 10和PM 2.5颗粒的去除率分别达到99.65％和97.94％。此外，过滤器对大肠杆菌和金黄色葡萄球菌显示出优异的抗菌性能，并且在体外培养细胞中未观察到明显的细胞毒性。经过多次回收后，过滤器仍保持出色的抗菌性能和纤维形态。

Published: 2020

Journal ：CELLULOSE

Impact Factor：4.386

Paper link: https://link.springer.com/article/10.1007%2Fs10570-020-03034-8