首页|TFC organic solvent nanofiltration membrane fabricated by a novel HDPE membrane support covered by manganese dioxide /tannic acid-Fe(3+)layers
TFC organic solvent nanofiltration membrane fabricated by a novel HDPE membrane support covered by manganese dioxide /tannic acid-Fe(3+)layers
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NSTL
Elsevier
Background: It is of great importance to select an ultrafiltration (UF) support with outstanding solvent stability to fabricate thin film composite (TFC) organic solvent nanofiltration (OSN) membranes.& nbsp;Methods: High density polyethylene (HDPE)-polystyrene (PS)-styrene-ethylene-butylene-styrene (SEBS) blends were prepared through the incorporation of different SEBS weight percentages. Next, HDPE membranes were made via extracting the dispersed phase from the HDPE/PS/SEBS blends using THF. Then, the membrane with the optimum properties was selected as the support for preparing the TFC membranes. Accordingly, the support was first contacted with KMnO4 solution, by which MnO2 nanoparticles (NPs) were generated on the support surface. The membrane surface was then contacted with tannic acid (TA) and FeCl3 aqueous solutions consecutively to form a uniform TA-Fe3+ layer. Eventually, the PA layer was formed on the membrane surface through contacting with m-phenylenediamine aqueous solution and trimesoyl chloride/n-hexane solution consecutively.& nbsp;Significant Findings: The TFC membrane exhibited extraordinary dyes rejection and good methanol permeance in OSN applications. Moreover, DMF activation process was conducted on the TFC membrane, after which both the dye rejection performance and methanol permeance were enhanced. Moreover, it is worth pointing out that the membrane provided an excellent solvent stability after dipping in DMF after 100 days. (C) 2022 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
NSTL
Elsevier
