Preparation andperformance of UIO-66modified thin-film nanocomposite membrane for forward osmosis
ZHANG Zhe, WANG Lei, HE Miao-lu, CUI Qi, WANG Xu-dong
School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Research Institute of Membrane Separation Technology of Shaanxi Province, Key Laboratory of Membrane Separation of Shaanxi Province, Key Laboratory of Environmental Engineering of Shaanxi Province, Key Laboratory of Northwest water Resources, Environmental and Ecology, Ministry of Education;Xi'an 710055, China
UIO-66 modified thin-film composite membrane for forward osmosis was fabricated by forming polyamide layer via interfacial polymerization. FI-IR, SEM, AFM, XRD, and contact angle have been utilized to characterize UIO-66 and the thin-film nanocomposite membranes (TFN) for forward osmosis.With DI water as feed solution and a 1mol/L NaCl as draw solution,the water flux of TFN0.04 membrane prepared with dispersing 0.04 wt% of UIO-66, reached from 10.28L/(m2·h) to 13.67L/(m2·h)under FO mode and 17.68L/(m2·h) to 20.41L/(m2·h) under PRO mode. Modified composite membrane has improved permeability and better selection performance. Meanwhile, The pollution experiment found that compared with the pure thin film composite membrane, the modified thin film composite membrane has a slower flux decay tendency and less adhesion to contaminant, which indicated that the modified composite membranes is resistant to pollution.
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