A Study of Polydimethylsiloxane/Aromatic Polyamide Laminated Membranes for Separation of Acetic Acid/Water Mixtures by Pervaporation Process

Abstract

Separation of acetic acid/water mixtures by pervaporation was attempted over a range of compositions using polydimethylsiloxane (PDMS). aromatic polyamide (PA), and laminated polydimethylsiloxane-aromatic polyamide membranes. PDMS membranes are hydrophobic and acetic acid selective. whereas PA membranes are hydrophilic and water selective. When PDMS and PA membranes were laminated, with PDMS on the top side and in contact with the feed, water selectivity of the bottom PA membrane was intensified. On the other hand, when the PA membrane was on the top side and in contact with the feed, the selectivity was lowered.

Investigation of the fundamental differences between polyamide-imide (PAI) and polyetherimide (PEI) membranes for isopropanol dehydration via pervaporation

“…Similar studies have been conducted on dense flat sheet membranes in previous reports [23][24][25][26] with various findings. However, this paper, for the first time, investigated the effect of feed permeation direction through asymmetric flat sheet pervaporation membranes, and found that the separation with feed solution flowing along the porous side of the membrane had substantially higher pervaporation performance.…”

Organic‐Inorganic Hybrid Membranes for Removal of Benzene from an Aqueous Solution by Pervaporation

“…Membrane techniques for the removal of VOCs in water can offer potential savings in energy costs. Many studies have been reported on the permeation and removal of VOCs from water by various hydrophobic polymer membranes, mainly composed of poly(dimethylsiloxane) (PDMS), [18][19][20][21][22][23][24][25][26][27][28] zeolite-filled PDMS, [29,30] and various other materials. [31][32][33] In this study, for the purpose of removal of VOCs, such as benzene, from water we prepared organic-inorganic hybrid membranes by the sol-gel method using alkyl methacrylate as an organic compound having high affinity for VOCs and TEOS as an inorganic compound.…”

Use of Pervaporation-Bioreactor Hybrid Processes in Biotechnology

“…In particular, acetic acid, a by-product in several fermentations, is a problem and can lead to product inhibitions. Studies of model systems, which showed the permeability of acetic acid through PDMS [43], were not verified by any of the studies in Tab. 2 [20,26,30,31,33].…”