SYNTHESIS AND CHARACTERIZATION OF POLYSULFONE-NANOCLAY MODIFIED MEMBRANES USING DIFFERENT TYPES OF NANOCLAYS
Paper ID : 1361-MST2015-FULL
Authors:
1Raphael Rodrigues *, 2José Mierzwa, 3Chad Vecitis
1Polytechnic School of University of São Paulo / Harvard School of Engineering and Applied Sciences
2Polytechnic School of University of São Paulo
3Harvard School of Engineering and Applied Sciences
Abstract:
Flat sheet asymmetric polysulfone (PS)/nanoclay composite membranes with two different types of nanoclays (regular nanoclay and organically surface modified nanoclay) with different dosages were prepared by phase inversion method. For the synthesis, NMP was used as solvent and deionized water as non solvent. Membranes permeability was evaluated in a cross flow test cell unit. Control membranes had a permeability rate of 15 L.m-2.h-1.bar-1, while the optimal concentration of nanoclay (1.5 wt%) resulted in a permeability rate of 55 L.m-2.h-1.bar-1 and the optimal concentration of organically modified nanoclay (5 wt%) resulted in a permeability rate of 122 L.m-2.h-1.bar-1. These membranes were further examined to determine nanoclay effects on separation performance. Doping with organic modified nanoclay resulted in a greater permeability as compared to regular nanoclay, with similar rejection. Both types of nanoclay showed good performance after chemical cleaning, being less prone to irreversible fouling.
Keywords:
membrane modification, nanoclay, water treatment
Status : Paper Accepted (Oral Presentation)