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Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking

In recent decades, the advancements in layer-by-layer (LBL) assembly technology have provoked increasing interest in the preparation of multilayer polyelectrolyte membranes with excellent performance. In the current study, a novel nanofiltration (NF) membrane was prepared by pressure-driven layer-by...

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Detalles Bibliográficos
Autores principales: Liu, Yan, Chen, George Q., Yang, Xiuli, Deng, Huining
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6410208/
https://www.ncbi.nlm.nih.gov/pubmed/30682860
http://dx.doi.org/10.3390/membranes9020020
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author Liu, Yan
Chen, George Q.
Yang, Xiuli
Deng, Huining
author_facet Liu, Yan
Chen, George Q.
Yang, Xiuli
Deng, Huining
author_sort Liu, Yan
collection PubMed
description In recent decades, the advancements in layer-by-layer (LBL) assembly technology have provoked increasing interest in the preparation of multilayer polyelectrolyte membranes with excellent performance. In the current study, a novel nanofiltration (NF) membrane was prepared by pressure-driven layer-by-layer (LBL) assembly of polyethylenimine (PEI) and polyacrylicacid (PAA) on a porous substrate with chemical crosslinking. The effect of deposition pressure on separation performance of the prepared membranes was studied. The surface morphology, hydrophilicity and the charge property of the dynamically-deposited membranes were compared with those prepared by static adsorption. The characterization results showed that dynamic deposition process resulted in a smoother membrane surface with improved hydrophilicity. The mechanism of water-path formation was proposed to interpret the effect of pressure on the membrane performance. Glutaraldehyde (GA) was used as a crosslinker to reduce the number of polyelectrolyte bilayers for obtaining good separation performance. The rejections of different inorganic salts of the dynamically-deposited NF membrane were also investigated.
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spelling pubmed-64102082019-03-22 Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking Liu, Yan Chen, George Q. Yang, Xiuli Deng, Huining Membranes (Basel) Article In recent decades, the advancements in layer-by-layer (LBL) assembly technology have provoked increasing interest in the preparation of multilayer polyelectrolyte membranes with excellent performance. In the current study, a novel nanofiltration (NF) membrane was prepared by pressure-driven layer-by-layer (LBL) assembly of polyethylenimine (PEI) and polyacrylicacid (PAA) on a porous substrate with chemical crosslinking. The effect of deposition pressure on separation performance of the prepared membranes was studied. The surface morphology, hydrophilicity and the charge property of the dynamically-deposited membranes were compared with those prepared by static adsorption. The characterization results showed that dynamic deposition process resulted in a smoother membrane surface with improved hydrophilicity. The mechanism of water-path formation was proposed to interpret the effect of pressure on the membrane performance. Glutaraldehyde (GA) was used as a crosslinker to reduce the number of polyelectrolyte bilayers for obtaining good separation performance. The rejections of different inorganic salts of the dynamically-deposited NF membrane were also investigated. MDPI 2019-01-24 /pmc/articles/PMC6410208/ /pubmed/30682860 http://dx.doi.org/10.3390/membranes9020020 Text en © 2019 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
Liu, Yan
Chen, George Q.
Yang, Xiuli
Deng, Huining
Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking
title Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking
title_full Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking
title_fullStr Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking
title_full_unstemmed Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking
title_short Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking
title_sort preparation of layer-by-layer nanofiltration membranes by dynamic deposition and crosslinking
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6410208/
https://www.ncbi.nlm.nih.gov/pubmed/30682860
http://dx.doi.org/10.3390/membranes9020020
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