High performance thin film composite polyamide reverse osmosis membrane prepared via m-phenylenediamine and 2,2?benzidinedisulfonic acid

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• 作者：Garry Nathaniel B. Baroñ ; a ; Joohwan Lim ; Bumsuk Jung ; ^{bjung@mju.ac.kr}
• 关键词：Polyamide ; Thin film composite membrane ; Interfacial polymerization ; 2 ; 2&prime ; -Benzidinedisulfonic acid ; High performance RO membrane
• 刊名：Desalination
• 出版年：2012
• 出版时间：2 April, 2012
• 年：2012
• 卷：291
• 期：Complete
• 页码：69-77
• 全文大小：1734 K

文摘

Thin film composite (TFC) polyamide membranes for reverse osmosis (RO) were successfully prepared via interfacial polymerization of m-phenylenediamine (MPD), 2,2?benzidinedisulfonic acid (BDSA) and trimesoyl chloride (TMC) on a polysulfone support. The physico-chemical characteristics of the membranes were determined using ATR-FTIR, XPS, zeta potential measurement, SEM and AFM. Membrane performance experiments were investigated using NaCl and MgCl₂ salt solutions. The near region spectra show that the active layer of TFC membrane is an aromatic polyamide, with carboxyl and amino groups, as seen in the ATR-FTIR result. The sulfonyl group addition from the BDSA monomer is evident from the higher sulfur concentration as illustrated in the XPS results and due to more negative zeta potential values. Also, the SEM and AFM pictures show that the surface morphology became smoother as the BDSA content was increased. Due to the modification of the active layer, pure water permeability and rejection of NaCl and MgCl₂ salts were significantly enhanced.