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γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation

γ-Valerolactone (GVL) was selected as a renewable green solvent to prepare membranes via the process of phase inversion. Water and ethanol were screened as sustainable non-solvents to prepare membranes for nanofiltration (NF). Scanning electron microscopy was applied to check the membrane morphology...

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Detalles Bibliográficos
Autores principales: Rasool, Muhammad Azam, Vankelecom, Ivo F. J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8228422/
https://www.ncbi.nlm.nih.gov/pubmed/34072872
http://dx.doi.org/10.3390/membranes11060418
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author Rasool, Muhammad Azam
Vankelecom, Ivo F. J.
author_facet Rasool, Muhammad Azam
Vankelecom, Ivo F. J.
author_sort Rasool, Muhammad Azam
collection PubMed
description γ-Valerolactone (GVL) was selected as a renewable green solvent to prepare membranes via the process of phase inversion. Water and ethanol were screened as sustainable non-solvents to prepare membranes for nanofiltration (NF). Scanning electron microscopy was applied to check the membrane morphology, while aqueous rose Bengal (RB) and magnesium sulphate (MgSO(4)) feed solutions were used to screen performance. Cellulose acetate (CA), polyimide (PI), cellulose triacetate (CTA), polyethersulfone (PES) and polysulfone (PSU) membranes were fine-tuned as materials for preparation of NF-membranes, either by selecting a suitable non-solvent for phase inversion or by increasing the polymer concentration in the casting solution. The best membranes were prepared with CTA in GVL using water as non-solvent: with increasing CTA concentration (10 wt% to 17.5 wt%) in the casting solution, permeance decreased from 15.9 to 5.5 L/m(2)·h·bar while RB rejection remained higher than 94%. The polymer solubilities in GVL were rationalized using Hansen solubility parameters, while membrane performances and morphologies were linked to viscosity measurements and cloudpoint determination of the casting solutions to better understand the kinetic and thermodynamic aspects of the phase inversion process.
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spelling pubmed-82284222021-06-26 γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation Rasool, Muhammad Azam Vankelecom, Ivo F. J. Membranes (Basel) Article γ-Valerolactone (GVL) was selected as a renewable green solvent to prepare membranes via the process of phase inversion. Water and ethanol were screened as sustainable non-solvents to prepare membranes for nanofiltration (NF). Scanning electron microscopy was applied to check the membrane morphology, while aqueous rose Bengal (RB) and magnesium sulphate (MgSO(4)) feed solutions were used to screen performance. Cellulose acetate (CA), polyimide (PI), cellulose triacetate (CTA), polyethersulfone (PES) and polysulfone (PSU) membranes were fine-tuned as materials for preparation of NF-membranes, either by selecting a suitable non-solvent for phase inversion or by increasing the polymer concentration in the casting solution. The best membranes were prepared with CTA in GVL using water as non-solvent: with increasing CTA concentration (10 wt% to 17.5 wt%) in the casting solution, permeance decreased from 15.9 to 5.5 L/m(2)·h·bar while RB rejection remained higher than 94%. The polymer solubilities in GVL were rationalized using Hansen solubility parameters, while membrane performances and morphologies were linked to viscosity measurements and cloudpoint determination of the casting solutions to better understand the kinetic and thermodynamic aspects of the phase inversion process. MDPI 2021-05-31 /pmc/articles/PMC8228422/ /pubmed/34072872 http://dx.doi.org/10.3390/membranes11060418 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rasool, Muhammad Azam
Vankelecom, Ivo F. J.
γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation
title γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation
title_full γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation
title_fullStr γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation
title_full_unstemmed γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation
title_short γ-Valerolactone as Bio-Based Solvent for Nanofiltration Membrane Preparation
title_sort γ-valerolactone as bio-based solvent for nanofiltration membrane preparation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8228422/
https://www.ncbi.nlm.nih.gov/pubmed/34072872
http://dx.doi.org/10.3390/membranes11060418
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