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    The effect of Schiff base network on the separation performance of thin film nanocomposite forward osmosis membranes

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    Type
    Article
    Authors
    Akther, Nawshad
    Lim, Sungil
    Huy Tran, Van
    Phuntsho, Sherub
    Yang, Yanqin
    Bae, Tae-Hyun
    Ghaffour, NorEddine cc
    Kyong Shon, Ho
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    KAUST Grant Number
    URF/1/3404-01
    Date
    2019-02-16
    Online Publication Date
    2019-02-16
    Print Publication Date
    2019-06
    Permanent link to this record
    http://hdl.handle.net/10754/631108
    
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    Abstract
    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 Lm-2h-1) and AL-DS (25.2 vs. 19.4 Lm-2h-1) orientations when they were tested with deionized water and 0.5 M NaCl as feed and draw solution, respectively.
    Citation
    Akther N, Lim S, Huy Tran V, Phuntsho S, Yang Y, et al. (2019) The effect of Schiff base network on the separation performance of thin film nanocomposite forward osmosis membranes. Separation and Purification Technology. Available: http://dx.doi.org/10.1016/j.seppur.2019.02.034.
    Sponsors
    The research conveyed in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia, through the Competitive Research Grant Program – CRG2017 (CRG6), Grant # URF/1/3404-01.
    Publisher
    Elsevier BV
    Journal
    Separation and Purification Technology
    DOI
    10.1016/j.seppur.2019.02.034
    Additional Links
    https://www.sciencedirect.com/science/article/pii/S1383586618343089
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.seppur.2019.02.034
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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