Modify the Polyvinylidene Fluoride: Polyacrylonitrile Blend Nanofiber to Improve Membrane Filtration Efficiency.

Abstract

With the increasing sources of water pollution, there has been great interest in improving the efficiency of filtration membranes, which comes from obtaining a porous and high membrane surface area by electrospinning. In this research, we worked on producing a membrane from polyvinylidene fluoride (PVDF) and polyacrylonitrile (PAN), then strengthening it with titanium isopropoxide (Tipp) and converting PAN to amidoxime polyacrylonitrile (AOPAN) by reaction. Many physical tests were conducted, such as wettability, field emission scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to determine the efficiency of the membranes. The developed membrane has high crystalline and thermal properties, and the surface is characterized by high wettability compared to the properties of the undeveloped membrane. On the other hand, the developed membrane has a low pore size and high porosity, which increases the water flux rate to 804 (Lm-2.h-1) and reduces the milk protein flux rate to 145 (Lm-2.h-1), besides increasing the flux recovery ratio, solute rejection, and rejection rate to 91.79%, 89.61%, and 81.97% respectively.