Study of the Composition of Solutions in Coagulation and Rinsing Baths during upon Receipt Membrane via Phase Inversion
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The study presents an investigation into the composition of solutions in coagulation and rinsing baths used during membrane formation via phase inversion using an И-160 ionometer and a Fourier-transform infrared (FTIR) spectrometer "Thermo Nicolet" AVATAR 370. The concentrations of cations (Li⁺, Na⁺, Ca²⁺) and the anion (Cl⁻), as well as solution hardness, were determined in both coagulation and rinsing solutions. The surface structure of the membranes was studied using a CERTUS STANDARD V scanning probe microscope. The effect of the coagulation bath solvent (water) hardness on the membrane’s filtration properties and surface morphology was established. To evaluate membrane washing, ionometric and IR spectrometric studies of the washing solution were conducted until an neutral environment was achieved.
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