synthesis and study of pebax1657 / go and silica nps/pei thin film nano-composite membranes for gas dehydration

In this work, pebax® 1657 polymer in combination with go-sio2 nanoparticles was studied in a thin layer nanocomposite membrane on pei substrate for n2 dehydration. the nanoparticles varied from 0%, 0.5%, 1%, and it is done by dip coting method on the porous substrate pei. ftir, ca, and afm was used to characterize the membranes. the contact angle decreased from 77 to 19 showing a highly hydrophilic surface. the efficiency of the membranes improved by nanoparticles at a pressure of 2 to 6 barg. by adding 0.5wt.% go plus 0.5wt.% sio2 nanoparticles, water permeance and selectivity increased. the permeance of water vapor and n2 for the membrane mp 0.5-0.5 at 2 to 6 barg at 70% relative relative humidity reached from 158 and 0. 23 gpu to 969 and 31 gpu, respectively. the selectivity for membrane mp0.5-0.5 at 2 to 6 barg and 70% humidity increased by approximately 4-8 times.