جستجوی مقالات مرتبط با کلیدواژه « interfacial polymerization » در نشریات گروه « مواد و متالورژی »

Thin Film Composite (TFC) membranes were fabricated by Interfacial Polymerization (IP) ofM-Phenylene Diamine (MPD) and Tri-Mesoyl Chloride (TMC) on Polysulfone (PSf) support in the presence of hydrothermally synthesized TS-1 zeolite as an additive blended in the MPD aqueous solution. Formation of the MFI structure (Pentasil Zeolite), presence of extra-framework TiO2, and zeolite particle size were investigated through X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Field Emission Scanning Electron Microscopy (FE-SEM) analyses, respectively. In addition, the effect of the TS-1 zeolite concentration in the range of 0-0.02 wt. % on the desalination and antifouling performance of the reverse osmosis membranes was evaluated in this study. The obtained results revealed that the membrane containing zeolite at the optimal concentration of 0.005 wt. % had the smoothest surface (RMS: 21.05 nm) and lowest contact angle (51.32°), thus exhibiting the best performance in the water flux of 47.5 Lm-2h-1 at 15 bars. In addition, compared to the unfilled TFC membrane, the rejection percentage of NaCl was calculated as 96.7 % (2000 ppm). Further, the antifouling ability of the membranes in the face of Bovine Serum Albumin (BSA) showed the excellent fouling resistance of the zeolite-modified membranes.

In this research thin film heterogeneous cation exchange membrane was prepared by interfacial polymerization of polyacrylic acid-co-iron nickel oxide nanoparticle son PVC based substrate. Spectra analysis confirmed graft polymerization conclusively. The SEM images showed that polymerized layer covers the membranes by simple gel network entanglement. Results exhibited that membrane water content was decreased by using of PAA/Fe2NiO4 nanoparticles interfacial polymerization. Membrane potential, transport number and permselectivity all were declined initially by PAA interfacial polymerization in NaCl ionic solution and then began to increase. The membrane transport number and permselectivity showed decreasing trend in bivalent (BaCl2) ionic solution. The sodium flux and permeability were improved sharply by PAA graft polymerization on membrane surface and then decreased slightly by using of Fe2NiO4 nanoparticles in surface modifier. Different trend was found for barium flux and permeability. Membrane areal electrical resistance was also decreased by introducing interfacial graft polymerization on membrane surface.