File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Confined nanobubbles shape the surface roughness structures of thin film composite polyamide desalination membranes

TitleConfined nanobubbles shape the surface roughness structures of thin film composite polyamide desalination membranes
Authors
KeywordsComposite membranes
Desalination
Membrane technology
Nanocomposite films
Phase interfaces
Issue Date2019
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal of Membrane Science, 2019, v. 582, p. 342-349 How to Cite?
AbstractThe ridge-and-valley roughness structure of a polyamide reverse osmosis (RO) membrane has a paramount impact on its separation performance. We show that this surface roughness appearance was shaped by gas nanobubbles confined between the polyamide rejection layer and the substrate. Performing interfacial polymerization (IP) under alternative confinement conditions led to drastically different surface morphologies, e.g., smooth polyamide surface formed at support-free aqueous/organic interfaces whereas crater-like features formed in inversed IP. For the first time, we demonstrated the collapse of fully hydrated balloon-like nodules into dehydrated leaf-like and donut-like roughness features during membrane drying by performing an in-situ atomic force microscopic characterization. Deformation of roughness features caused by dehydration was not fully reversible, which correlates well with the dramatic reduction of membrane permeability upon drying. Our study provides a fundamental framework for the surface roughness formation in RO membranes, which is critical for advancing roughness control technologies with enhanced membrane performance.
Persistent Identifierhttp://hdl.handle.net/10722/272859
ISSN
2017 Impact Factor: 6.578
2015 SCImago Journal Rankings: 2.042

 

DC FieldValueLanguage
dc.contributor.authorSong, X-
dc.contributor.authorGan, B-
dc.contributor.authorYang, Z-
dc.contributor.authorTang, CY-
dc.contributor.authorGao, C-
dc.date.accessioned2019-08-06T09:17:55Z-
dc.date.available2019-08-06T09:17:55Z-
dc.date.issued2019-
dc.identifier.citationJournal of Membrane Science, 2019, v. 582, p. 342-349-
dc.identifier.issn0376-7388-
dc.identifier.urihttp://hdl.handle.net/10722/272859-
dc.description.abstractThe ridge-and-valley roughness structure of a polyamide reverse osmosis (RO) membrane has a paramount impact on its separation performance. We show that this surface roughness appearance was shaped by gas nanobubbles confined between the polyamide rejection layer and the substrate. Performing interfacial polymerization (IP) under alternative confinement conditions led to drastically different surface morphologies, e.g., smooth polyamide surface formed at support-free aqueous/organic interfaces whereas crater-like features formed in inversed IP. For the first time, we demonstrated the collapse of fully hydrated balloon-like nodules into dehydrated leaf-like and donut-like roughness features during membrane drying by performing an in-situ atomic force microscopic characterization. Deformation of roughness features caused by dehydration was not fully reversible, which correlates well with the dramatic reduction of membrane permeability upon drying. Our study provides a fundamental framework for the surface roughness formation in RO membranes, which is critical for advancing roughness control technologies with enhanced membrane performance.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci-
dc.relation.ispartofJournal of Membrane Science-
dc.subjectComposite membranes-
dc.subjectDesalination-
dc.subjectMembrane technology-
dc.subjectNanocomposite films-
dc.subjectPhase interfaces-
dc.titleConfined nanobubbles shape the surface roughness structures of thin film composite polyamide desalination membranes-
dc.typeArticle-
dc.identifier.emailYang, Z: zheyang8@hku.hk-
dc.identifier.emailTang, CY: tangc@hku.hk-
dc.identifier.authorityTang, CY=rp01765-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.memsci.2019.04.027-
dc.identifier.scopuseid_2-s2.0-85064536508-
dc.identifier.hkuros299802-
dc.identifier.volume582-
dc.identifier.spage342-
dc.identifier.epage349-
dc.publisher.placeNetherlands-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats