Modify the polyvinylidene fluoride: polyacrylonitrile blend nanofiber to improve membrane filtration efficiency
摘要
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 to produce a membrane from polyvinylidene fluoride and polyacrylonitrile (PAN). Then we strengthened it with titanium isopropoxide (Tipp) and converted PAN to amidoxime polyacrylonitrile by reaction. Many physical tests, such as wettability tests, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry and thermogravimetric analysis, have been conducted to determine the efficiency of the membranes. The developed membrane has high crystallinity and thermal properties, and the surface is characterized by a high wettability of 58.29 ± 4.57° at M3 compared to that of the undeveloped membrane. On the other hand, the developed membrane has a low pore size and high porosity of 13.809 µm and 91.7% respectively, 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), in addition to increasing the flux recovery ratio, solute rejection, and rejection rate to 91.79%, 89.61%, and 81.97%, respectively.