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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...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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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. |
format | Online Article Text |
id | pubmed-9144700 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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