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Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties

Porous polyamide-6 membranes were fabricated via a non-solvent induced phase inversion method, and the influence of gelation time on the properties of the membranes was investigated. Membrane samples with various gelation times were prepared. The evaluation of the membranes’ properties was carried o...

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Autores principales: Ebrahimi, Mohammad, Kujawski, Wojciech, Fatyeyeva, Kateryna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8949474/
https://www.ncbi.nlm.nih.gov/pubmed/35323791
http://dx.doi.org/10.3390/membranes12030315
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author Ebrahimi, Mohammad
Kujawski, Wojciech
Fatyeyeva, Kateryna
author_facet Ebrahimi, Mohammad
Kujawski, Wojciech
Fatyeyeva, Kateryna
author_sort Ebrahimi, Mohammad
collection PubMed
description Porous polyamide-6 membranes were fabricated via a non-solvent induced phase inversion method, and the influence of gelation time on the properties of the membranes was investigated. Membrane samples with various gelation times were prepared. The evaluation of the membranes’ properties was carried out by various analyses and tests, such as scanning electron microscopy, atomic force microscopy, contact angle, wet and dry thickness, mean pore size measurements, porosity, water uptake, mechanical resistance, hydrodynamic water fluxes, membrane hydrodynamic permeability, and retention testing. The scanning electron microscopy images (both surface and cross-section) demonstrated that the increase in gelation time from 0 (M(0)) to 10 (M(10)) min led to the morphological change of membranes from isotropic (M(0)) to anisotropic (M(10)). The wet and dry thickness of the membranes showed a downward tendency with increasing gelation time. The M(0) membrane exhibited the lowest bubble contact angle of 60 ± 4° and the lowest average surface roughness of 124 ± 22 nm. The highest values of mean pore size and porosity were observed for the M(0) sample (0.710 ± 0.06 µm and 72 ± 2%, respectively), whereas the M(10) membrane demonstrated the highest tensile strength of 4.1 MPa. The membrane water uptake was diminished from 62 to 39% by increasing the gelation time from 0 to 10 min. The M(0) membrane also showed the highest hydrodynamic water flux among the prepared membranes, equal to 28.6 L m(−2) h(−1) (at Δp = 2 bar).
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spelling pubmed-89494742022-03-26 Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties Ebrahimi, Mohammad Kujawski, Wojciech Fatyeyeva, Kateryna Membranes (Basel) Article Porous polyamide-6 membranes were fabricated via a non-solvent induced phase inversion method, and the influence of gelation time on the properties of the membranes was investigated. Membrane samples with various gelation times were prepared. The evaluation of the membranes’ properties was carried out by various analyses and tests, such as scanning electron microscopy, atomic force microscopy, contact angle, wet and dry thickness, mean pore size measurements, porosity, water uptake, mechanical resistance, hydrodynamic water fluxes, membrane hydrodynamic permeability, and retention testing. The scanning electron microscopy images (both surface and cross-section) demonstrated that the increase in gelation time from 0 (M(0)) to 10 (M(10)) min led to the morphological change of membranes from isotropic (M(0)) to anisotropic (M(10)). The wet and dry thickness of the membranes showed a downward tendency with increasing gelation time. The M(0) membrane exhibited the lowest bubble contact angle of 60 ± 4° and the lowest average surface roughness of 124 ± 22 nm. The highest values of mean pore size and porosity were observed for the M(0) sample (0.710 ± 0.06 µm and 72 ± 2%, respectively), whereas the M(10) membrane demonstrated the highest tensile strength of 4.1 MPa. The membrane water uptake was diminished from 62 to 39% by increasing the gelation time from 0 to 10 min. The M(0) membrane also showed the highest hydrodynamic water flux among the prepared membranes, equal to 28.6 L m(−2) h(−1) (at Δp = 2 bar). MDPI 2022-03-10 /pmc/articles/PMC8949474/ /pubmed/35323791 http://dx.doi.org/10.3390/membranes12030315 Text en © 2022 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
Ebrahimi, Mohammad
Kujawski, Wojciech
Fatyeyeva, Kateryna
Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties
title Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties
title_full Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties
title_fullStr Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties
title_full_unstemmed Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties
title_short Fabrication of Polyamide-6 Membranes—The Effect of Gelation Time towards Their Morphological, Physical and Transport Properties
title_sort fabrication of polyamide-6 membranes—the effect of gelation time towards their morphological, physical and transport properties
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8949474/
https://www.ncbi.nlm.nih.gov/pubmed/35323791
http://dx.doi.org/10.3390/membranes12030315
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