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PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature

In this study, we successfully prepared nine non-woven, supported polyvinylidene fluoride (PVDF) membranes, using a phase inversion precipitation method, starting from a 15 wt % PVDF solution in N-methyl-2-pyrrolidone. Various membrane morphologies were obtained by using (1) PVDF polymers, with dive...

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Autores principales: Haponska, Monika, Trojanowska, Anna, Nogalska, Adrianna, Jastrzab, Renata, Gumi, Tania, Tylkowski, Bartosz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6418571/
https://www.ncbi.nlm.nih.gov/pubmed/30966017
http://dx.doi.org/10.3390/polym9120718
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author Haponska, Monika
Trojanowska, Anna
Nogalska, Adrianna
Jastrzab, Renata
Gumi, Tania
Tylkowski, Bartosz
author_facet Haponska, Monika
Trojanowska, Anna
Nogalska, Adrianna
Jastrzab, Renata
Gumi, Tania
Tylkowski, Bartosz
author_sort Haponska, Monika
collection PubMed
description In this study, we successfully prepared nine non-woven, supported polyvinylidene fluoride (PVDF) membranes, using a phase inversion precipitation method, starting from a 15 wt % PVDF solution in N-methyl-2-pyrrolidone. Various membrane morphologies were obtained by using (1) PVDF polymers, with diverse molecular weights ranging from 300 to 700 kDa, and (2) different temperature coagulation baths (20, 40, and 60 ± 2 °C) used for the film precipitation. An environmental scanning electron microscope (ESEM) was used for surface and cross-section morphology characterization. An atomic force microscope (AFM) was employed to investigate surface roughness, while a contact angle (CA) instrument was used for membrane hydrophobicity studies. Fourier transform infrared spectroscopy (FTIR) results show that the fabricated membranes are formed by a mixture of TGTG’ chains, in α phase crystalline domains, and all-TTTT trans planar zigzag chains characteristic to β phase. Moreover, generated results indicate that the phases’ content and membrane morphologies depend on the polymer molecular weight and conditions used for the membranes’ preparation. The diversity of fabricated membranes could be applied by the End User Industries for different applications.
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spelling pubmed-64185712019-04-02 PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature Haponska, Monika Trojanowska, Anna Nogalska, Adrianna Jastrzab, Renata Gumi, Tania Tylkowski, Bartosz Polymers (Basel) Article In this study, we successfully prepared nine non-woven, supported polyvinylidene fluoride (PVDF) membranes, using a phase inversion precipitation method, starting from a 15 wt % PVDF solution in N-methyl-2-pyrrolidone. Various membrane morphologies were obtained by using (1) PVDF polymers, with diverse molecular weights ranging from 300 to 700 kDa, and (2) different temperature coagulation baths (20, 40, and 60 ± 2 °C) used for the film precipitation. An environmental scanning electron microscope (ESEM) was used for surface and cross-section morphology characterization. An atomic force microscope (AFM) was employed to investigate surface roughness, while a contact angle (CA) instrument was used for membrane hydrophobicity studies. Fourier transform infrared spectroscopy (FTIR) results show that the fabricated membranes are formed by a mixture of TGTG’ chains, in α phase crystalline domains, and all-TTTT trans planar zigzag chains characteristic to β phase. Moreover, generated results indicate that the phases’ content and membrane morphologies depend on the polymer molecular weight and conditions used for the membranes’ preparation. The diversity of fabricated membranes could be applied by the End User Industries for different applications. MDPI 2017-12-15 /pmc/articles/PMC6418571/ /pubmed/30966017 http://dx.doi.org/10.3390/polym9120718 Text en © 2017 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Haponska, Monika
Trojanowska, Anna
Nogalska, Adrianna
Jastrzab, Renata
Gumi, Tania
Tylkowski, Bartosz
PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature
title PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature
title_full PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature
title_fullStr PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature
title_full_unstemmed PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature
title_short PVDF Membrane Morphology—Influence of Polymer Molecular Weight and Preparation Temperature
title_sort pvdf membrane morphology—influence of polymer molecular weight and preparation temperature
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6418571/
https://www.ncbi.nlm.nih.gov/pubmed/30966017
http://dx.doi.org/10.3390/polym9120718
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