期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 24, 页码 14093-14100出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta01505b
关键词
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资金
- National Key Technology RD Program [2016YFB0303300]
- National Natural Science Foundation of China [51873152]
- Tianjin Science and Technology Plans [20JCQNJC00250, 18PTSYJC00180]
This study presents a novel method for constructing hierarchical nanofibrous membranes with excellent mechanical strength and filtration efficiency, showing promising applications in various filtration fields, especially in personal protective equipment.
Air pollution and public health incidents have become a serious global concern. Hierarchical nanofibrous membranes are considered as high-performance filters with an advanced structure, but their reliable fabrication is still challenging. Herein, a novel methodology involving the combination of a multi-orifices solution blowing technique process and low molecule organogel self-assembly strategy is reported to construct a hierarchical dual-nanonet of polymer nanofibers and supramolecular nanofibrils. Through an adsorption-nucleation-growth model, ultrathin supramolecular nanofibrils (10-30 nm) were assembled in situ within a fluffy solution-blown nanofiber mat with strong inter-fiber connections. Benefiting from the synergistic effects of the ultrathin diameter, small pore size, high porosity and stable inter-fiber connections, the hierarchical dual-nanonet demonstrates robust mechanical strength, a high filtration efficiency (99.999% for 0.3 mu m), low pressure drop (32 Pa), a high quality factor (0.189 Pa-1), and a boosted moisture permeation. The comprehensive performances indicate promising applications in various filtration applications, especially in the field of personal protective equipment.
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