Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 612, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2020.118447
Keywords
Aligned nanofiber; Substrate; Internal concentration polarization; Thin-film composite membrane; Forward osmosis
Categories
Funding
- National Natural Science Foundation of China [21878117]
- Natural Science Foundation of Hubei Scientific Committee [2016CFA001]
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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.
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