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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 12, 2022
Revised October 28, 2022
Accepted November 6, 2022

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Thin film composite on sulfonated PVDF electrospun and its performance in nanofiltration

Omid Qanati Zahra Dusti Mir Saeed Seyed Dorraji^† Arsalan Ahmadi Mohammad Hossein Rasoulifard

Applied Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran

dorraji@znu.ac.ir

Korean Journal of Chemical Engineering, May 2023, 40(5), 1141-1150(10), 10.1007/s11814-022-1341-7

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Abstract

Thin-film composite membranes (TFC) have attracted great attention in the field of seawater and wastewater treatment. A novel nanofiltration membrane was fabricated via interfacial polymerization of meta phenylene diamine (MPD) and 1,3,5-benzene tricarbonyl chloride (TMC) on the surface of a recently developed nanofibrous mat from sulfonated PVDF (S-PVDF). Chlorosulfonic acid was used to sulfonate PVDF powder, and new peaks on 1 HNMR and FT-IR techniques confirmed the preparation of S-PVDF. Using solutions of NaCl, CaCl2, MgSO4, and Na2SO4, a filtration trial was performed with dead-end filtration equipment. The results demonstrated that sulfonation of PVDF decreased the water contact angle from 137.1 for intact PVDF to 85.5 for S-PVDF/PVDF (50/50). In addition, it reduced the mean diameter of nanofibers from 300 to under 130 nm and, consequently, smaller pores with a mean size of around 90 nm were formed. The membrane containing 10% S-PVDF had the highest steady pure water flux by 25.5 L/m2 h and exhibited higher rejection of bivalent and univalent salt ions (>97% bivalent and >88% univalent) with the sensible flow. The electrospun nanofibrous S-PVDF/PVDF proved to be a usable supporting material with a higher hydrophilic character that makes electrospun mats an interesting option for liquid treatment.

Keywords

Sulfonated PVDF Nanofiltration Electrospinning Composite Membrane Interfacial Polymerization

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