ISSN: 0256-1115 (print version) ISSN: 1975-7220 (electronic version)
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In relation to this article, we declare that there is no conflict of interest.
Publication history
Received December 31, 2017
Accepted May 27, 2018
articles 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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Sublayer assisted by hydrophilic and hydrophobic ZnO nanoparticles toward engineered osmosis process

School of Chemical Engineering, Kavosh Institute of Higher Education, Mahmood Abad, Iran 1Membrane Research Group, Nanotechnology Institute, Babol Noshirvani University of Technology, Shariati Ave., Babol, 47148-71167, Iran 2Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran 3Department of Chemical Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
Korean Journal of Chemical Engineering, November 2018, 35(11), 2256-2268(13), 10.1007/s11814-018-0086-9
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Abstract

Hydrophilic and hydrophobic polyethersulfone (PES)-zinc oxide (ZnO) sublayers were prepared by loading of ZnO nanoparticles into PES matrix. Both porosity and hydrophilicity of the hydrophilic sublayer were increased upon addition of hydrophilic ZnO, while these were decreased for the hydrophobic sublayer. In addition, the results demonstrated that the hydrophilic membrane exhibited smaller structural parameter (S value or S parameter or S), which is beneficial for improving pure water permeability and decreasing mass transfer resistance. In contrast, a higher S parameter was obtained for the hydrophobic membrane. With a 2M NaCl as DS and DI water as FS, the pure water flux of hydrophilic TFN0.5 membrane was increased from 21.02 L/m2 h to 30.06 L/m2 h and decreased for hydrophobic TFN0.5 membrane to 14.98 L/m2 h, while the salt flux of hydrophilic membrane increased from 10.12 g/m2 h to 17.31 g/m2 h and decreased for hydrophobic TFN0.5 membrane to 3.12 g/m2 h. The increment in pure water permeability can be ascribed to reduction in S parameter, which resulted in reduced internal concentration polarization (ICP). The current study provides a feasible and low cost procedure to decrease the ICP in FO processes.

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