Modern Chemistry & Applications

Abstract

Preparation, Characterization, and Taguchi Optimization of Poly (Amide/Amic Acid) Thin Film Composite Membrane

Gholam Ali Koohmareh*, Behnaz Ghalavand, Akbar Malekpour

A thin film composite membrane was prepared on a microporous membrane by in situ interfacial polycondensation of a new diamine containing amic acid with trimesoyl chloride. Diamine Amic Acid (DAAA) was synthesized from the reaction of pyromellitic dianhydride with aminoethyl piperazine and was characterized by FT-IR and ¹H-NMR spectroscopies. The prepared membrane was characterized by ATR-IR technique and was evaluated from aspect of surface properties, morphology, and performance using AFM, SEM, contact angle, and cross-flow membrane module.

Finally, Taguchi method has been used to investigate the effects of concentration of DAAA monomer, pH, reaction time, and curing time on permeation and rejection processes. The optimum conditions to reach the desired performance were obtained. The operating conditions in the optimum performance were obtained as follow: concentration of DAAA= 3% (w/v), pH=9, reaction time=60 s and curing time=10 min. Under these conditions for a 1000 ppm solution of Na₂SO₄, permeation and rejection were obtained 34.17 (L.h^-1.m^-2) and 92.6%, respectively.

Published Date: 2025-01-15; Received Date: 2023-10-17