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Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane

In the context of designing a photocatalytic self-cleaning/low-fouling membrane, the stability of PVDF-PVP-TiO(2) hollow-fiber membranes under UV irradiation has been studied. The effect of irradiation power, aqueous environment composition and fouling state on the properties of the membranes has be...

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Autores principales: Roubaud, Emma, Maréchal, William, Lorain, Olivier, Lamaa, Lina, Peruchon, Laure, Brochier, Cédric, Mendret, Julie, Mericq, Jean-Pierre, Brosillon, Stephan, Faur, Catherine, Causserand, Christel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9144700/
https://www.ncbi.nlm.nih.gov/pubmed/35629864
http://dx.doi.org/10.3390/membranes12050538
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author Roubaud, Emma
Maréchal, William
Lorain, Olivier
Lamaa, Lina
Peruchon, Laure
Brochier, Cédric
Mendret, Julie
Mericq, Jean-Pierre
Brosillon, Stephan
Faur, Catherine
Causserand, Christel
author_facet Roubaud, Emma
Maréchal, William
Lorain, Olivier
Lamaa, Lina
Peruchon, Laure
Brochier, Cédric
Mendret, Julie
Mericq, Jean-Pierre
Brosillon, Stephan
Faur, Catherine
Causserand, Christel
author_sort Roubaud, Emma
collection PubMed
description In the context of designing a photocatalytic self-cleaning/low-fouling membrane, the stability of PVDF-PVP-TiO(2) hollow-fiber membranes under UV irradiation has been studied. The effect of irradiation power, aqueous environment composition and fouling state on the properties of the membranes has been investigated. With this aim, SEM observations, chemical analysis and tensile strength measurements have been conducted. The results indicate that pristine membranes that undergo UV irradiation in ultra-pure water are significantly degraded due to attacks of OH° radicals. However, when methylene blue, used as a model pollutant, is introduced in the aqueous environment, OH° radicals preferentially react with this molecule rather than the membranes, successfully preserving the original properties of the latter. The presence of an adsorbed BSA layer (pre-fouling by immersion) on the surface of the membrane delays membrane aging, as the BSA layer is degraded by radicals instead of the membrane material. The degradation of the BSA layer also validates the self-cleaning properties of the membrane. However, when membranes are pre-fouled by filtration of a 2 g/L BSA solution, delay to aging is less. This is because OH° radicals do not reach BSA molecules that are trapped inside the membrane pores, and therefore react with the membrane material.
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spelling pubmed-91447002022-05-29 Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane Roubaud, Emma Maréchal, William Lorain, Olivier Lamaa, Lina Peruchon, Laure Brochier, Cédric Mendret, Julie Mericq, Jean-Pierre Brosillon, Stephan Faur, Catherine Causserand, Christel Membranes (Basel) Article In the context of designing a photocatalytic self-cleaning/low-fouling membrane, the stability of PVDF-PVP-TiO(2) hollow-fiber membranes under UV irradiation has been studied. The effect of irradiation power, aqueous environment composition and fouling state on the properties of the membranes has been investigated. With this aim, SEM observations, chemical analysis and tensile strength measurements have been conducted. The results indicate that pristine membranes that undergo UV irradiation in ultra-pure water are significantly degraded due to attacks of OH° radicals. However, when methylene blue, used as a model pollutant, is introduced in the aqueous environment, OH° radicals preferentially react with this molecule rather than the membranes, successfully preserving the original properties of the latter. The presence of an adsorbed BSA layer (pre-fouling by immersion) on the surface of the membrane delays membrane aging, as the BSA layer is degraded by radicals instead of the membrane material. The degradation of the BSA layer also validates the self-cleaning properties of the membrane. However, when membranes are pre-fouled by filtration of a 2 g/L BSA solution, delay to aging is less. This is because OH° radicals do not reach BSA molecules that are trapped inside the membrane pores, and therefore react with the membrane material. MDPI 2022-05-21 /pmc/articles/PMC9144700/ /pubmed/35629864 http://dx.doi.org/10.3390/membranes12050538 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
Roubaud, Emma
Maréchal, William
Lorain, Olivier
Lamaa, Lina
Peruchon, Laure
Brochier, Cédric
Mendret, Julie
Mericq, Jean-Pierre
Brosillon, Stephan
Faur, Catherine
Causserand, Christel
Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane
title Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane
title_full Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane
title_fullStr Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane
title_full_unstemmed Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane
title_short Understanding Aging Mechanisms in the Context of UV Irradiation of a Low Fouling and Self-Cleaning PVDF-PVP-TiO(2) Hollow-Fiber Membrane
title_sort understanding aging mechanisms in the context of uv irradiation of a low fouling and self-cleaning pvdf-pvp-tio(2) hollow-fiber membrane
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9144700/
https://www.ncbi.nlm.nih.gov/pubmed/35629864
http://dx.doi.org/10.3390/membranes12050538
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