Preparation of thin-film composite nanofiltration membranes with amino-functionalized graphene oxide by interfacial polymerization
(2.Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin, China 300072)
【Abstract】A series of thin-film composite (TFC) nanofiltration (NF) membranes were prepared by interfacial polymerization, using amino-functionalized graphene oxide (NGO) as the aqueous monomer. Fourier transform infrared spectrometer (FTIR), X-ray photoelectron spectrometer (XPS), transmission electron microscope (TEM), scanning electron microscope (SEM) and atomic force microscope (AFM) were applied to measure the chemical compositions and morphologies of the prepared NGO and TFC NF membranes. The effect of NGO and trimesoyl chloride (TMC) concentrations on the separation performance of the TFC NF membranes was investigated systematically. The TFC NF membrane exhibited a high flux of 27.8 L·m−2·h−1 under a relatively low operation pressure (0.2 MPa) and an excellent dye/salt separation performance with high rejections for organic dyes (methyl orange of 74.8%, orange G Ⅱ of 96.0%, Congo red of 98.5% and methyl blue of 99%) and low rejections for inorganic salts (Na2SO4 of 21.4%, MgSO4 of 10.7%, NaCl of 5.3% and MgCl2 of 1.5%). In addition, the TFC NF membrane showed good long term operational stability as well as a satisfying antifouling performance against bovine serum albumin (BSA).
【Keywords】 amino-functionalized graphene oxide; interfacial polymerization; membrane; nanofiltration; preparation;
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