Abstract
In this work, we target the preparation and characterization of asymmetric polysulfone nanocomposite charged membranes for hemodialysis application. The phase inversion technique was applied, using N-methylpyrrolidone and water as solvent and non-solvent, respectively. With the aid of blend method, the control membrane was modified using poly(acrylonitrile-co-sodium methallyl sulfonate) copolymer (AN69) and the montmorillonite clay (MMT). The estimation of MMT effect in polysulfone solution was carried out by a thermodynamic study using the titration method. Different techniques were applied in characterization of PSf/clay and PSf/AN69/clay membrane composites as Fourier transform infrared spectroscopy technique, coloration test, thermogravimetric analysis, differential scanning calorimetry analysis, X-ray diffraction, scanning electron microscopy, and water flux measurement. The obtained results show that the combination of hemocompatible PSf/AN69 blend and MMT nanocharge induces the formation of new hemodialysis composite membranes, with enhanced hydrophilic properties, good thermal sterilization resistance, better water permeability, and good capacity of protein adsorption. Besides, the obtained composite membranes have the ability to be easily functionalized due to the high density of negative charge resulting by the presence of AN69 and MMT clay at the membrane surfaces.
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