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dc.contributor.authorZhang, Youfangen_US
dc.contributor.authorZeng, Zhihuien_US
dc.contributor.authorMa, Daphne Xiu Yunen_US
dc.contributor.authorZhao, Chenyangen_US
dc.contributor.authorAng, Jia Mingen_US
dc.contributor.authorNg, Bing Fengen_US
dc.contributor.authorWan, Man Punen_US
dc.contributor.authorWong, Shing-Chungen_US
dc.contributor.authorWang, Zheen_US
dc.contributor.authorLu, Xuehongen_US
dc.identifier.citationZhang, Y., Zeng, Z., Ma, D. X. Y., Zhao, C., Ang, J. M., Ng, B. F., ... Lu, X. (2019). Mussel-inspired approach to cross-linked functional 3D nanofibrous aerogels for energy-efficient filtration of ultrafine airborne particles. Applied Surface Science, 479700-708. doi:10.1016/j.apsusc.2019.02.173en_US
dc.description.abstractPolymer aerogels fabricated using conventional methods typically have relatively narrow mono-modal pore size distribution (PSD), and relatively thick and tight pore walls. Herein, inspired by mussel glue, cross-linked threedimensional (3D) polyacrylonitrile (PAN) nanofibrous aerogels (NFAs) with ultrahigh porosity, hierarchical porous structures, and good compression resistance are successfully fabricated via electrospinning, facile polydopamine (PDA) coating and crosslinking by ferric ions (Fe3+) followed by freeze-drying. Morphology characterization andcompression tests showthatboth multiplehydrogen bondingfacilitated bythePDA coating and Fe3+-PDA coordination bonding could effectively induce the formation of inter-fiber junctions, enhancing compression resistanceofthe3DNFAsandleadingtohierarchical porousstructureswithaverywidePSD.When a thin layer of the optimized 3D NFA with a large specific surface area (85.7m2g−1) is combined with a commercial air filter, the composite filter obtained exhibits high filtration efficiencies of 99.72% and 99.85% for airborne particles with sizes of<100nm and<500nm, respectively, at a low pressure drop of only 54.1Pa. The results show that the cross-linked NFAs could act as a highly efficient air filter for ultrafine particles while not increasing the overall pressure-drop significantly, which are due to the good adhesive properties of PDA, electrostatic charge induced by Fe3+, and high porosity and hierarchical porous structures of the 3D NFAs.en_US
dc.format.extent25 p.en
dc.relation.ispartofApplied Surface Scienceen_US
dc.rights© 2019 Elsevier. All rights reserved. This paper was published in Applied Surface Science and is made available with permission of Elsevier.en_US
dc.titleMussel-inspired approach to cross-linked functional 3D nanofibrous aerogels for energy-efficient filtration of ultrafine airborne particlesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science & Engineeringen_US
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.description.versionAccepted versionen_US
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