期刊
JOURNAL OF MEMBRANE SCIENCE
卷 673, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2023.121409
关键词
Organic solvent nanofiltration; Nanoparticles; Coating; Thin-film composite (TFC)
In this study, separation nanochannels were successfully constructed on the surface of PAN substrate membranes by coating quaternized P(VC-r-DMAEMA) (Q-PVD) nanoparticles and hydrolyzed polyacrylonitrile (HPAN) substrates. The types of substrates and concentrations of nanoparticles were optimized to achieve proper performance. The obtained thin-film nanocomposite (TFN) membranes demonstrated excellent stability in various organic solvents and high retention rates for specific molecular weight dyes. This composite membrane shows great potential in the field of OSN.
Organic solvent nanofiltration (OSN) has been regarded as a promising membrane-based separation technology with great potential in many fields. In this work, based on the strong electrostatic interaction between nano -particles (NPs) prepared by the quaternized P(VC-r-DMAEMA) (Q-PVD) and hydrolyzed polyacrylonitrile (HPAN) substrate membranes, separation nanochannels were successfully constructed on the surface of mem-branes by a one-step coating method. The types of the substrates and concentrations of NPs were optimized to obtain the proper performance. The surface morphology, chemical compositions, surface wettability, surface charge, and pore size were characterized. The obtained thin-film nanocomposite (TFN) membranes exhibited excellent stability in various common organic solvents, such as n-heptane, acetonitrile, ethanol, etc. Furthermore, composite membranes showed excellent retention for dyes with specific molecular weights, with a molecular weight cut-off (MWCO) of 825 Da. In particular, the rejection rates of Coomassie brilliant blue (BB) and Bengal rose red (RB) were 96.6% and 97.9%, respectively. Given the above characteristics, the composite membranes are expected to be used in the field of OSN.
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