Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/85232
Title: | Robust lignin-based aerogel filters : high-efficiency capture of ultrafine airborne particulates and the mechanism | Authors: | Zeng, Zhihui Ma, Daphne Xiu Yun Zhang, Youfang Wang, Zhe Ng, Bing Feng Wan, Man Pun Lu, Xuehong |
Keywords: | DRNTU::Engineering::Materials Aerogel Lignin |
Issue Date: | 2019 | Source: | Zeng, Z., Ma, D. X. Y., Zhang, Y., Wang, Z., Ng, B. F., Wan, M. P., & Lu, X. (2019). Robust lignin-based aerogel filters : high-efficiency capture of ultrafine airborne particulates and the mechanism. ACS Sustainable Chemistry & Engineering, 7(7), 6959-6968. doi:10.1021/acssuschemeng.8b06567 | Series/Report no.: | ACS Sustainable Chemistry & Engineering | Abstract: | In this article, we report a new type of ligninbased wood-like aerogel filters composed of aligned micrometer-sized pores and cross-linked lignin-based cell walls, as well as their air filtration-related properties. The aerogel filters were prepared via facile unidirectional ice-crystal-induced selfassembly from an aqueous solution, followed by annealing at 300 °C. The cross-linking of lignin and reinforcement with a very small amount of graphene significantly enhance the mechanical stiffness, thermal stability, and humidity/water resistance of the aerogels. Simultaneously, abundant functional groups retained from lignin and the aligned pore channels lead to high filtration efficiency for ultrafine particles accompanied by fairly low pressure drop. Moreover, these low-cost and renewable biomass-based filters also exhibit outstanding long-term filtration efficiency. Through filtration tests with particles of various sizes, it is revealed that the air filtration by this type of aerogel filters is dominated by diffusion, rather than impaction or interception mechanism, which offers a new avenue for design of novel high-performance air filters. | URI: | https://hdl.handle.net/10356/85232 http://hdl.handle.net/10220/48388 |
DOI: | 10.1021/acssuschemeng.8b06567 | Schools: | School of Materials Science and Engineering School of Mechanical and Aerospace Engineering |
Rights: | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry & Engineering, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acssuschemeng.8b06567 | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | MAE Journal Articles MSE Journal Articles |
Files in This Item:
File | Description | Size | Format | |
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Revised Manuscript _zhihui filtration.pdf | 1.44 MB | Adobe PDF | ![]() View/Open |
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