Sustainable Novel Membranes Based on Carboxymethyl Cellulose Modified with ZIF-8 for Isopropanol/Water Pervaporation Separation

Anna Kuzminova (), Mariia Dmitrenko, Roman Dubovenko, Anna Mikulan, Anastasia Stepanova, Margarita Puzikova, Nadezhda Rakovskaya, Anton Mazur, Anna Shurukhina, Aida Rudakova, Alexei Emeline, Rongxin Su and Anastasia Penkova ()
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Anna Kuzminova: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Mariia Dmitrenko: 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
Anna Mikulan: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Anastasia Stepanova: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Margarita Puzikova: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Nadezhda Rakovskaya: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Anton Mazur: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Anna Shurukhina: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Aida Rudakova: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Alexei Emeline: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Rongxin Su: State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Anastasia Penkova: St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia

Sustainability, 2025, vol. 17, issue 9, 1-29

Abstract: The present study investigates the potential of novel mixed matrix membranes that are formed from the biopolymer carboxymethyl cellulose (CMC) and the metal–organic framework ZIF-8 to improve the pervaporation dehydration of isopropanol. The effect of ZIF-8 content variation and porous substrate selection (comprising cellulose acetate (CA) and polyacrylonitrile) on dense and supported membrane properties is systematically investigated using multiple analytical techniques. It is found that ZIF-8 incorporation alters the membrane structure (confirmed by FTIR and NMR), increases surface roughness (observed via SEM and AFM), enhances swelling degree (obtained by swelling measurements), improves surface hydrophobicity (determined by contact angle analysis), and elevates thermal stability (verified by TGA). Quantum chemical calculations are used to validate the interactions between the polymer matrix, modifier, and feed components. The transport properties of developed membranes are evaluated through the dehydration of isopropanol via pervaporation. The cross-linked supported CMC membrane with 10 wt% ZIF-8 prepared on the CA substrate has the optimal performance: permeation flux of 0.136–1.968 kg/(m 2 h) and ˃92 wt% water in the permeate via the dehydration of isopropanol (water content 12–100 wt%) at 22 °C.

Keywords: sustainable development; green membrane; biopolymer; carboxymethyl cellulose; ZIF-8; 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: 2025
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