1. Improved performance of thin-film composite membrane supported by aligned nanofibers substrate with slit-shape pores for forward osmosis.
- Author
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Han, Chao, Zhang, Xuan, Ding, Chun, Xiong, Shu, Yu, Xi, and Wang, Yan
- Subjects
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COMPOSITE membranes (Chemistry) , *OSMOSIS , *DEIONIZATION of water , *POLYAMIDES , *AQUEOUS solutions , *WATER use - Abstract
Substrate construction is considered as the most effective approach to alleviate the internal concentration polarization (ICP) effect, and therefore achieves the excellent performance of resultant thin-film composite (TFC) membrane in forward osmosis (FO) process. In this work, a well-aligned nanofiber substrate was prepared and employed for constructing the high-performance TFC-FO membrane for the first time. The physicochemical properties of the substrate, the micro-structure of polyamide layer and the separation performance of resultant TFC-FO membranes were systematically investigated. Taking advantages of the larger pore size and the better pore interconnectivity of the well-aligned nanofiber substrate, the resultant TFC-FO membrane achieves the best water fluxes of 50.7 and 62.9 LMH, accompanied with the ultralow reverse salt flux in FO and PRO modes, using deionized water feed solution and 1 M NaCl aqueous draw solution. This work may provide a new orientation in developing high-performance TFC membranes. Image 1 • Aligned nanofiber substrate with slit-shape pore structure was facilely prepared. • TFC membrane with aligned nanofiber substrate was reported for the first time. • Aligned nanofiber substrate alleviates internal concentration polarization effect. • TFC membrane with aligned nanofiber substrate shows excellent FO performance. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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