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Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system

The wetting of hollow fibre membranes decreases the performance of the liquid–gas membrane contactor for CO(2) capture in biogas upgrading. To solve this problem, in this work, a poly(vinylidene fluoride) (PVDF) hollow fibre membrane for a liquid–gas membrane contactor was coated with a superhydroph...

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Detalles Bibliográficos
Autores principales: Jin, Pengrui, Huang, Chuan, Li, Jiaxiang, Shen, Yadong, Wang, Liao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5717692/
https://www.ncbi.nlm.nih.gov/pubmed/29291117
http://dx.doi.org/10.1098/rsos.171321
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author Jin, Pengrui
Huang, Chuan
Li, Jiaxiang
Shen, Yadong
Wang, Liao
author_facet Jin, Pengrui
Huang, Chuan
Li, Jiaxiang
Shen, Yadong
Wang, Liao
author_sort Jin, Pengrui
collection PubMed
description The wetting of hollow fibre membranes decreases the performance of the liquid–gas membrane contactor for CO(2) capture in biogas upgrading. To solve this problem, in this work, a poly(vinylidene fluoride) (PVDF) hollow fibre membrane for a liquid–gas membrane contactor was coated with a superhydrophobic layer composed of a combination of hydrophobic SiO(2) nanoparticles and polydimethylsiloxane (PDMS) by the method of spray deposition. A rough layer of SiO(2) deposited on the PVDF membrane resulted in an enhanced surface hydrophobicity. The surface structure of the pristine PVDF significantly affected the homogeneity of the generated SiO(2) layer. A uniform surface coating on the PVDF upper layer resulted from the presence of micrometre and nanometre-sized roughness on the surface of the PVDF membrane, which was achieved with a SiO(2) concentration of 4.44 mg ml(−1) (0.2 g/45 ml) in the coating solution. As a result, the water contact angle of the modified surface was recorded as 155 ± 3°, which is higher than that of the pristine surface. The high contact angle is advantageous for reducing the wetting of the membrane. Additional mass transfer resistance was introduced by the superhydrophobic layer. In addition, continuous CO(2) absorption tests were carried out in original and modified PVDF hollow fibre membrane contactors, using monoethanolamine (MEA) solution as the absorbent. A long-term stability test revealed that the modified PVDF hollow fibre membrane contactor was able to outperform the original membrane contactor and demonstrated outstanding long-term stability, suggesting that spray deposition is a promising approach to obtain superhydrophobic PVDF membranes for liquid–gas membrane absorption.
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spelling pubmed-57176922017-12-29 Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system Jin, Pengrui Huang, Chuan Li, Jiaxiang Shen, Yadong Wang, Liao R Soc Open Sci Chemistry The wetting of hollow fibre membranes decreases the performance of the liquid–gas membrane contactor for CO(2) capture in biogas upgrading. To solve this problem, in this work, a poly(vinylidene fluoride) (PVDF) hollow fibre membrane for a liquid–gas membrane contactor was coated with a superhydrophobic layer composed of a combination of hydrophobic SiO(2) nanoparticles and polydimethylsiloxane (PDMS) by the method of spray deposition. A rough layer of SiO(2) deposited on the PVDF membrane resulted in an enhanced surface hydrophobicity. The surface structure of the pristine PVDF significantly affected the homogeneity of the generated SiO(2) layer. A uniform surface coating on the PVDF upper layer resulted from the presence of micrometre and nanometre-sized roughness on the surface of the PVDF membrane, which was achieved with a SiO(2) concentration of 4.44 mg ml(−1) (0.2 g/45 ml) in the coating solution. As a result, the water contact angle of the modified surface was recorded as 155 ± 3°, which is higher than that of the pristine surface. The high contact angle is advantageous for reducing the wetting of the membrane. Additional mass transfer resistance was introduced by the superhydrophobic layer. In addition, continuous CO(2) absorption tests were carried out in original and modified PVDF hollow fibre membrane contactors, using monoethanolamine (MEA) solution as the absorbent. A long-term stability test revealed that the modified PVDF hollow fibre membrane contactor was able to outperform the original membrane contactor and demonstrated outstanding long-term stability, suggesting that spray deposition is a promising approach to obtain superhydrophobic PVDF membranes for liquid–gas membrane absorption. The Royal Society Publishing 2017-11-15 /pmc/articles/PMC5717692/ /pubmed/29291117 http://dx.doi.org/10.1098/rsos.171321 Text en © 2017 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Chemistry
Jin, Pengrui
Huang, Chuan
Li, Jiaxiang
Shen, Yadong
Wang, Liao
Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system
title Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system
title_full Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system
title_fullStr Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system
title_full_unstemmed Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system
title_short Surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system
title_sort surface modification of poly(vinylidene fluoride) hollow fibre membranes for biogas purification in a gas–liquid membrane contactor system
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5717692/
https://www.ncbi.nlm.nih.gov/pubmed/29291117
http://dx.doi.org/10.1098/rsos.171321
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