Conceptual visualization of GO effect on fouling.

Abstract Polyamide (PA) composite membranes were prepared by interfacial polymerization with piperazine, m ‐phenylene diamine, and trimesoyl chloride as monomers polysulfone ultrafiltration supports. Factors affecting the performances of changing characteristics PA active layers studied. First, monomer compositions varied, organic solvents (benzene 1,2‐dichloroethane) better solubility for than hexane used polymerization. As chemical additives capable property interface formed between water...

Abstract Polyamide (PA) composite membranes in which PA active layers were interconnected with support via the formation of ionic bonds prepared by interfacial polymerization piperazine (PIP) trimesoyl chloride (TMC) on surfaces microporous polyacrylonitrile (PAN) supports containing carboxylic acid groups. Formation through an acid‐base reaction between NH group PIP and COOH was studied using FTIR‐ATR spectroscopy. Variation surface morphologies that induced presence observed a FESEM AFM....

Abstract Polyamide/polyacrylonitrile thin‐film‐composite (TFC) nanofiltration (NF) membranes for the separation of oleic acid dissolved in organic solvents (methanol and acetone) were interfacially prepared by reaction trimesoyl chloride an phase with aqueous containing piperazine m ‐phenylene diamine. The interfacial was confirmed investigation attenuated total reflection infrared spectrum. surface morphology polyamide TFC examined scanning electron microscopy. hydrophilic properties...

Abstract Integrally skinned asymmetric polyetherimide (PEI) membranes were prepared by the phase inversion process from casting solution containing dimethylformamide (DMF) as a solvent and 1,4‐dioxane cosolvent. Deionized water was used coagulation medium in preparing membranes. The effect of investigated measuring properties, permeation membrane structures. Various effects polymer concentration, evaporation time, bath temperature also studied. Low miscibility with coagulant (water) resulted...

The gas–liquid mass transfer accompanied by chemical reaction was studied in a membrane absorber for the separation of CO2 from mixture gases. membranes used were made polytetrafluoroethylene (PTFE) and polyvinylidenefluoride (PVDF) aqueous MEA solution as an absorbent possessing high with carbon dioxide. numerical model concentration profile fiber developed, influence its flux on external resistances, including gas membrane, simulated this compared experimental results. Experimentally, it...

Abstract Polyacrylonitrile (PAN) supports useful for the formation of nanofiltration (NF) composite membranes were prepared from PAN solutions in N ‐methylpyrrolidone (NMP), using a phase‐inversion method. The compositions PAN/NMP used as follows: 10/90, 15/85, and 20/80 (in wt %). treated with various concentrations NaOH aqueous (0.1, 0.5, 1, 2 mol) certain periods times (0.5, 2, 3 h) order to modify their surface chemically morphologically. characteristics supports, modified or unmodified,...

Abstract The phase‐inversion process was used to prepare integrally skinned asymmetric polysulfone (PSf) membranes with different pore sizes. Membranes were prepared from a casting solution of PSf; N ‐methyl‐2‐pyrrolidone (NMP) as solvent; and 1,4‐dioxane, diethylene glycol dimethyl ether (DGDE), acetone, γ‐butyrolactone (GBL) additives by immersing them in water coagulant. effect the on membrane performance structure investigated. low miscibility DGDE, acetone coagulant resulted reduced...

Nanofiltration membranes based on poly(vinyl alcohol) (PVA) and ionic polymers, such as sodium alginate (SA) chitosan, were prepared by casting the respective polymer solutions. The from PVA or PVA–ionic blend crosslinked in a isopropanol solution using glutaraldehyde crosslinking agent. characterized with Fourier transform infrared spectroscopy X-ray diffractometry swelling test. through acetal linkage formation between OH groups of ionomer appeared to be semicrystalline. To study...