Avalia？？o das características de transporte em membranas de poliamida 66 preparadas com diferentes solventes

in the present study, polyamide 66 (pa 66) membranes were prepared by phase inversion method and characterized in order to verify their potential application in ultrafiltration processes. pa 66 membranes were prepared using two different solvents, formic acid (fa) and hydrochloric acid (hcl), and water as a non-solvent. fourier-transform infrared spectroscopy (ft-ir) showed that the chemical structure of pa 66 was not altered by the use of solvents in the preparation of membranes. the compaction experiment with pure water performed at a pressure of 1500 kpa revealed that membranes prepared with fa undergo greater compaction of its structure and had a permeate flux value of approximately 17 l.m-2.h-1 whereas the membrane prepared with hcl had a permeate flux of 22.2 l.m-2.h-1. in the ultrafiltration experiment, both membranes had retention values around 70% for egg albumin and 80% for bovine serum albumin. based on this result, one concludes that both membranes had nominal cut off values for application in ultrafiltration processes.