Development and Characterization of PVA Membranes Modified with In(BTC) Metal–Organic Framework for Sustainable Pervaporation Separation of Isopropanol/Water

Vladimir Polyakov, Mariia Dmitrenko (), Meri Kalmakhelidze, Anna Kuzminova, Roman Dubovenko, Elizaveta Mukhanova, Alexander Soldatov and Anastasia Penkova ()
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Vladimir Polyakov: The Smart Materials Research Institute, Southern Federal University, 105/42 Bolshaya Sadovaya Str., Rostov-on-Don 344090, Russia
Mariia Dmitrenko: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Meri Kalmakhelidze: The Smart Materials Research Institute, Southern Federal University, 105/42 Bolshaya Sadovaya Str., Rostov-on-Don 344090, Russia
Anna Kuzminova: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Roman Dubovenko: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Elizaveta Mukhanova: The Smart Materials Research Institute, Southern Federal University, 105/42 Bolshaya Sadovaya Str., Rostov-on-Don 344090, Russia
Alexander Soldatov: The Smart Materials Research Institute, Southern Federal University, 105/42 Bolshaya Sadovaya Str., Rostov-on-Don 344090, Russia
Anastasia Penkova: The Smart Materials Research Institute, Southern Federal University, 105/42 Bolshaya Sadovaya Str., Rostov-on-Don 344090, Russia

Sustainability, 2024, vol. 16, issue 23, 1-21

Abstract: In this study, pervaporation membranes from synthetic biodegradable polyvinyl alcohol (PVA) with improved properties for isopropanol dehydration were developed through modification with a synthesized In(BTC) metal–organic framework. The improvement in the PVA membrane properties was achieved by varying the In(BTC) concentration (2.5–7 wt.%) in the PVA matrix to allow us to select the optimal concentration for the membrane, which was further chemically cross-linked with maleic acid to increase the resistance, and developing a cross-linked supported membrane from the optimal PVA/5%In(BTC) composite for promising industrial applications. The synthesized In(BTC) and membranes were characterized by using spectroscopic, microscopic, X-ray diffraction, and thermogravimetric analysis methods, as well as swelling degree, contact angle measurements, and the Brunauer–Emmett–Teller adsorption model. The obtained regularities were confirmed by quantum chemical calculations. The cross-linked supported membrane from PVA/5%In(BTC) had optimal transport properties for isopropanol dehydration (20–90 wt.% water), 99.9–89.0 wt.% water in the permeate, and 0.142–0.341 kg/(m 2 h) of permeation flux, the rate of which was four times higher compared to the PVA membrane in separating 20–30 wt.% water/isopropanol.

Keywords: polyvinyl alcohol; metal–organic frameworks; In(BTC); membrane; pervaporation; isopropanol dehydration (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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