石墨炭纳米颗粒改性聚砜支撑层制备正渗透复合膜

doi:10.11896/cldb.20010121

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Abstract Forward osmosis (FO) membrane-based separation process forced by the osmotic pressure, is particularly attractive due to the lower energy consumption. The polyamide thin-film composite (TFC) membrane has achieved a dominant position in FO field. However, internal concentration polarization (ICP) is a serious challenge in the TFC FO membrane which causes the experimental water flux significantly lower than the theoretical value. Therefore, modification of the polyamide TFC membrane to reduce the ICP will be necessary to enhance the separation perfor-mance of FO. In this study, polysulfone (PSF) supporting membrane doped with graphite carbon nanoparticles was prepared by phase conversion method. Polyamide active layer was prepared via interfacial polymerization of m-phenylenediamine and trimesoyl chloride on the PSF surface of supporting layer to fabricate the thin-film composite (TFC) membrane. Scanning electron microscope and contact angle analyzer were used to characterize the PSF supporting membrane and TFC membrane. The results showed that the hydrophilicity and surface porosity of the graphite carbon nanoparticles incorporated PSF membrane was enhanced; the phenomenon of internal concentration polarization was abate; the corresponding permeability was improved and water flux increased. When the additional amount of graphite carbon nanoparticles was 0.01wt%, the water flux with the active layer toward the draw solution (AL-DS) reached 22.4 L/(m²·h), which increased by 96.7% compared with the unmodified FO membrane. It indicated that the new graphite carbon nanoparticles can effectively improve the forward osmosis separation performance of polyamide composite membrane.

Key words： graphite carbon nanoparticles polysulfone (PSF) supporting membrane polyamide thin-film composite (TFC) membrane forward osmosis water flux

Published: 10 May 2021

CLC number:

TQ028

Fund:Fundamental Research Funds for the Central Universities (201964020) and the National Natural Science Foundation of China (U1607124).

About author:: Zicheng Yao received his B.E. degrees in June 2015 from Shandong University of Science and Technology. From September 2016 to June 2019, he studied for master's degree in Chemical Engineering at Ocean University of China, focusing on the research of functional modification direction of polyamide forward osmosis composite membrane.
Guiru Zhu received her Ph. D. degree in 2007 from Dalian Institute of Chemical Physics, Chinese Academy of Sciences. She is currently a professor in College of Chemistry and Chemical Engineering, Ocean University of China and participates in the research of the fabrication thin-film composite membranes and the applications in reverse osmosis and forward osmosis, and extract chemical resource from seawater and salt lake brine.

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	YAO Zicheng
	XIAO Fangkun
	LIU Zhaofeng
	ZHANG Dapeng
	ZHU Guiru

Cite this article:

YAO Zicheng,XIAO Fangkun,LIU Zhaofeng, et al. Polysulfone Supporting Layer Modified by Graphite Carbon Nanoparticles to Fabricate TFC Membrane for Forward Osmosis Application[J]. Materials Reports, 2021, 35(8): 8196-8200.

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http://www.mater-rep.com/EN/10.11896/cldb.20010121 OR http://www.mater-rep.com/EN/Y2021/V35/I8/8196

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