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Article: Beyond superwetting surfaces: dual-scale hyperporous membrane with rational wettability for “nonfouling” emulsion separation via coalescence demulsification

TitleBeyond superwetting surfaces: dual-scale hyperporous membrane with rational wettability for “nonfouling” emulsion separation via coalescence demulsification
Authors
Keywordsbeyond superwetting surfaces
nonfouling emulsion separation
coalescence demulsification
poly(hydroxyethyl methylacrylate)
water vapor fumigation
Issue Date2021
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick
Citation
ACS Applied Materials & Interfaces, 2021, v. 13 n. 3, p. 4731-4739 How to Cite?
AbstractMembrane fouling is the obstacle that limits the practical application of membranes in efficient oil/water separation. The main reason for membrane fouling is the deposition of the dispersed phase (e.g., oil) on the membrane surface based on the sieving effect. The key challenge for solving the fouling problem is to achieve fouling removal via rationally considering hydrodynamics and interfacial science. Herein, a poly(vinylidene fluoride) membrane with a dual-scale hyperporous structure and rational wettability is designed to achieve a continuous “nonfouling” separation for oil/water emulsions via membrane demulsification. The membrane is fabricated via dual-phase separation (vapor and nonsolvent) and modified by in situ polymerization of poly(hydroxyethyl methylacrylate) (contact angle 59 ± 1°). The membrane shows stable permeability (1078 ± 50 Lm–2h–1bar–1) and high separation efficiency (>99.0%) in 2 h of continuous cross-flow without physicochemical washing compared to superwetting membranes. The permeation is composed of two distinct immiscible liquid phases via coalescence demulsification. The surface shearing and pore throat collision coalescence demulsification mechanism is proposed, and rational interface wettability facilitates the foulant/membrane interaction for “nonfouling” separation. Beyond superwetting surfaces, a new strategy for achieving “nonfouling” emulsion separation by designing membranes with a dual-scale hyperporous structure and rational wettability is provided.
Persistent Identifierhttp://hdl.handle.net/10722/305300
ISSN
2023 Impact Factor: 8.3
2023 SCImago Journal Rankings: 2.058
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, J-
dc.contributor.authorHe, B-
dc.contributor.authorDing, Y-
dc.contributor.authorLi, T-
dc.contributor.authorZhang, W-
dc.contributor.authorZhang, Y-
dc.contributor.authorLiu, F-
dc.contributor.authorTang, CY-
dc.date.accessioned2021-10-20T10:07:28Z-
dc.date.available2021-10-20T10:07:28Z-
dc.date.issued2021-
dc.identifier.citationACS Applied Materials & Interfaces, 2021, v. 13 n. 3, p. 4731-4739-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10722/305300-
dc.description.abstractMembrane fouling is the obstacle that limits the practical application of membranes in efficient oil/water separation. The main reason for membrane fouling is the deposition of the dispersed phase (e.g., oil) on the membrane surface based on the sieving effect. The key challenge for solving the fouling problem is to achieve fouling removal via rationally considering hydrodynamics and interfacial science. Herein, a poly(vinylidene fluoride) membrane with a dual-scale hyperporous structure and rational wettability is designed to achieve a continuous “nonfouling” separation for oil/water emulsions via membrane demulsification. The membrane is fabricated via dual-phase separation (vapor and nonsolvent) and modified by in situ polymerization of poly(hydroxyethyl methylacrylate) (contact angle 59 ± 1°). The membrane shows stable permeability (1078 ± 50 Lm–2h–1bar–1) and high separation efficiency (>99.0%) in 2 h of continuous cross-flow without physicochemical washing compared to superwetting membranes. The permeation is composed of two distinct immiscible liquid phases via coalescence demulsification. The surface shearing and pore throat collision coalescence demulsification mechanism is proposed, and rational interface wettability facilitates the foulant/membrane interaction for “nonfouling” separation. Beyond superwetting surfaces, a new strategy for achieving “nonfouling” emulsion separation by designing membranes with a dual-scale hyperporous structure and rational wettability is provided.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick-
dc.relation.ispartofACS Applied Materials & Interfaces-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsami.0c19561-
dc.subjectbeyond superwetting surfaces-
dc.subjectnonfouling emulsion separation-
dc.subjectcoalescence demulsification-
dc.subjectpoly(hydroxyethyl methylacrylate)-
dc.subjectwater vapor fumigation-
dc.titleBeyond superwetting surfaces: dual-scale hyperporous membrane with rational wettability for “nonfouling” emulsion separation via coalescence demulsification-
dc.typeArticle-
dc.identifier.emailTang, CY: tangc@hku.hk-
dc.identifier.authorityTang, CY=rp01765-
dc.description.naturepostprint-
dc.identifier.doi10.1021/acsami.0c19561-
dc.identifier.pmid33427454-
dc.identifier.scopuseid_2-s2.0-85099958676-
dc.identifier.hkuros326755-
dc.identifier.volume13-
dc.identifier.issue3-
dc.identifier.spage4731-
dc.identifier.epage4739-
dc.identifier.isiWOS:000614062400121-
dc.publisher.placeUnited States-

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