Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation

Novel positively charged nanofiltration membranes were facilely prepared by polydopamine (PDA) deposition followed by crosslinking on the polyethersulfone (PES) ultrafiltration (UF) membrane substrate. Specifically, small molecules DMAPA and 1,3-dibromopropane were separately selected as the bridge...

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Autores principales:	Zhiming Mi, Zhixiao Liu, Sizhuo Jin, Dawei Zhang, Daming Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Positively charged nanofiltration membranes Small molecules Crosslinking Hydrophilicity Cation separation Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/2f6d22e1831e4b73a8e6178b2467e99c
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spelling	oai:doaj.org-article:2f6d22e1831e4b73a8e6178b2467e99c2021-11-24T04:26:00ZPositively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation0142-941810.1016/j.polymertesting.2020.107000https://doaj.org/article/2f6d22e1831e4b73a8e6178b2467e99c2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941820322297https://doaj.org/toc/0142-9418Novel positively charged nanofiltration membranes were facilely prepared by polydopamine (PDA) deposition followed by crosslinking on the polyethersulfone (PES) ultrafiltration (UF) membrane substrate. Specifically, small molecules DMAPA and 1,3-dibromopropane were separately selected as the bridge agent and crosslinking agent, which can not only realize the moderate crosslinking and densification of the loose structure of the PDA layer, but also further improve the hydrophilicity and positive charges of the PDA layer. Under the optimized conditions of DMAPA concentration (2 g/L), 1,3-dibromopropane concentration (10 wt%) and reaction time (9 h), the composite membrane had the surface pore size as low as 1.1 nm, water contact angle as low as 35.1° and zeta potential as high as +63.8 mV at pH = 6. As a result, the optimized positively charged NF membrane (M3) showed an outstanding permeance up to 15.7 L m−2 h−1 bar−1 while maintaining a high rejection above 95% for MgCl2. Meanwhile, M3 also showed good environmental adaptability when facing complex feeding or operating conditions. This work provided new situation in the design and construction of positive charged NF membranes for high efficiency cation separation.Zhiming MiZhixiao LiuSizhuo JinDawei ZhangDaming WangElsevierarticlePositively charged nanofiltration membranesSmall moleculesCrosslinkingHydrophilicityCation separationPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 107000- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Positively charged nanofiltration membranes Small molecules Crosslinking Hydrophilicity Cation separation Polymers and polymer manufacture TP1080-1185
spellingShingle	Positively charged nanofiltration membranes Small molecules Crosslinking Hydrophilicity Cation separation Polymers and polymer manufacture TP1080-1185 Zhiming Mi Zhixiao Liu Sizhuo Jin Dawei Zhang Daming Wang Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation
description	Novel positively charged nanofiltration membranes were facilely prepared by polydopamine (PDA) deposition followed by crosslinking on the polyethersulfone (PES) ultrafiltration (UF) membrane substrate. Specifically, small molecules DMAPA and 1,3-dibromopropane were separately selected as the bridge agent and crosslinking agent, which can not only realize the moderate crosslinking and densification of the loose structure of the PDA layer, but also further improve the hydrophilicity and positive charges of the PDA layer. Under the optimized conditions of DMAPA concentration (2 g/L), 1,3-dibromopropane concentration (10 wt%) and reaction time (9 h), the composite membrane had the surface pore size as low as 1.1 nm, water contact angle as low as 35.1° and zeta potential as high as +63.8 mV at pH = 6. As a result, the optimized positively charged NF membrane (M3) showed an outstanding permeance up to 15.7 L m−2 h−1 bar−1 while maintaining a high rejection above 95% for MgCl2. Meanwhile, M3 also showed good environmental adaptability when facing complex feeding or operating conditions. This work provided new situation in the design and construction of positive charged NF membranes for high efficiency cation separation.
format	article
author	Zhiming Mi Zhixiao Liu Sizhuo Jin Dawei Zhang Daming Wang
author_facet	Zhiming Mi Zhixiao Liu Sizhuo Jin Dawei Zhang Daming Wang
author_sort	Zhiming Mi
title	Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation
title_short	Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation
title_full	Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation
title_fullStr	Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation
title_full_unstemmed	Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation
title_sort	positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2f6d22e1831e4b73a8e6178b2467e99c
work_keys_str_mv	AT zhimingmi positivelychargednanofiltrationmembranepreparedbypolydopaminedepositionfollowedbycrosslinkingforhighefficiencycationseparation AT zhixiaoliu positivelychargednanofiltrationmembranepreparedbypolydopaminedepositionfollowedbycrosslinkingforhighefficiencycationseparation AT sizhuojin positivelychargednanofiltrationmembranepreparedbypolydopaminedepositionfollowedbycrosslinkingforhighefficiencycationseparation AT daweizhang positivelychargednanofiltrationmembranepreparedbypolydopaminedepositionfollowedbycrosslinkingforhighefficiencycationseparation AT damingwang positivelychargednanofiltrationmembranepreparedbypolydopaminedepositionfollowedbycrosslinkingforhighefficiencycationseparation
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Positively charged nanofiltration membrane prepared by polydopamine deposition followed by crosslinking for high efficiency cation separation

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