The effect of Schiff base network on the separation performance of thin film nanocomposite forward osmosis membranes 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Separation and Purification Technology
年/卷/期
2019 / 217 /
页码
284-293
ISSN号
1383-5866
作者单位
Univ Technol Sydney, CTWW, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;Univ Technol Sydney, CTWW, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;Univ Technol Sydney, CTWW, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;Univ Technol Sydney, CTWW, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;King Abdullah Univ Sci & Technol, WDRC, Biol & Environm Sci & Engn Div BESE, Thuwal 239556900, Saudi Arabia;Univ Technol Sydney, CTWW, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia;
作者
Akther, Nawshad;Lim, Sungil;Van Huy Tran;Phuntsho, Sherub;Yang, Yanqin;Tae-Hyun Bae;Ghaffour, Noreddine;Shon, Ho Kyong;
摘要
In this study, Schiff base network-1 (SNW-1) nanoparticles, which are covalent organic frameworks (COFs), were used as fillers in the polyamide (PA) active layer to elevate the performance of thin-film nanocomposite (TFN) forward osmosis (FO) membranes. The TFN membranes were prepared by interfacial polymerization (IP) of m-phenylenediamine (MPD) and trimesoyl chloride (TMC), and the SNW-1 nanoparticles were dispersed in the MPD aqueous solution at various concentrations. The secondary amine groups of SNW-1 nanoparticles reacted with the acyl chloride groups of TMC during the IP reaction to form strong covalent/amide bonds, which facilitated better interface integration of SNW-1 nanoparticles in the PA layer. Additionally, the incorporation of amine-rich SNW-1 nanoparticles into the TFN membranes improved their surface hydrophilicity, and the porous structure of SNW-1 nanoparticles offered additional channels for transport of water molecules. The TFN0.005 membrane with a SNW-1 nanoparticle loading of 0.005 wt% demonstrated a higher water flux than that of pristine TFC membrane in both AL-FS (12.0 vs. 9.3 L m(-2) h(-1)) and AL-DS (25.2 vs. 19.4 L m(-2) h(-1)) orientations when they were tested with deionized water and 0.5 M NaCl as feed and draw solution, respectively.
机翻摘要
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关键词/主题词
Forward osmosis (FO);Interfacial polymerization (IP);Covalent organic frameworks (COFs);Schiff base network-1 (SNW-1);Thin-film nanocomposite (TFN) membrane;
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