Multi-Scale Nanoarchitectured Fibrous Networks for High-Performance, Self-Sterilization, and Recyclable Face Masks.
Multi-Scale Nanoarchitectured Fibrous Networks for High-Performance, Self-Sterilization, and Recyclable Face Masks.
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DOI：
10.1002/smll.202105570
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发表时间：
2021-11
期刊：
影响因子：
13.3
通讯作者：
Jian Xiong;Ailin Li;Ye Liu;Liming Wang;X. Qin;Jianyong Yu
中科院分区：
文献类型：
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作者：
Jian Xiong;Ailin Li;Ye Liu;Liming Wang;X. Qin;Jianyong Yu
空气中的颗粒物(PM)污染物，特别是纳米级的污染物，已经造成了严重的公共健康问题。全球对高性能和可回收口罩的需求正在急剧增加，特别是在新冠肺炎疫情期间。然而，目前的口罩对PM0.3/病原体的拦截效率低，透气性有限，无法重复使用和回收。在这里，多尺度纳米结构纳米纤维/碳纳米管网络是通过无针电纺/喷雾网络策略构建的，使得碳纳米管网络(直径≈25 nm)能够层层焊接在带电纳米纤维支架(直径100 nm)上。优化后的纳米碳管网络具有蓬松的结构，具有窄分布的小孔(尺寸为≈400 nm)、自由分子流动行为和静电吸附性能，因此由于其独特的纳米结构，在阳光下表现出高过滤效率(99.994%PM0.3去除)和低阻力(5分钟内99.986%)和电热驱动自杀菌(2分钟内99.9999%)。最重要的是，废弃的纳米管/碳纳米管过滤器可以完全回收用作高性能太阳能蒸汽发生器来淡化海水(3.56 L m-2d-1)。这项工作为减少疾病传播、资源消耗和环境负担提供了一个引人入胜的解决方案。
Airborne particulate matter (PM) pollutants, especially with nanoscale size, have caused serious public health issues. The global demand for high-performance and recyclable face masks is increasing dramatically, especially during the COVID-19 pandemic. However, present masks suffer from low-efficiency interception of PM0.3 /pathogen, limited air permeability, and incapacity to reuse and recycle. Here, multi-scale nanoarchitectured nanofiber/carbon nanotube (NF/CNT) networks are constructed by a needleless-electrospinning/spraying-netting strategy, enabling well-dispersed CNT networks (diameter ≈ 25 nm) welded on charged nanofibrous scaffolds (diameter > 100 nm) layer by layer. The optimized NF/CNT networks possess a fluffy structure with narrow-distribution small pores (size ≈ 400 nm), "free molecular flow" behavior, and electrostatic adsorption property, thereby exhibiting high filtration efficiency (>99.994% PM0.3 removal) and low resistance (99.986% in 5 min) under 1 sun and electrothermal-driven self-sterilization (>99.9999% in 2 min) in sunless scenes owing to their unique nanoarchitecture. Most importantly, the abandoned NF/CNT filters can be fully recycled as high-performance solar vapor generators to desalinate seawater (3.56 L m-2 d-1 ). This work offers a fascinating solution to reduce disease transmission, resource consumption, and environmental burdens.