Using nanocomposite materials technology to understand and control reverse osmosis membrane compaction

Handle URI:
http://hdl.handle.net/10754/600153
Title:
Using nanocomposite materials technology to understand and control reverse osmosis membrane compaction
Authors:
Pendergast, Mary Theresa M.; Nygaard, Jodie M.; Ghosh, Asim K.; Hoek, Eric M.V.
Abstract:
Composite reverse osmosis (RO) membranes were formed by interfacial polymerization of polyamide thin films over pure polysulfone and nanocomposite-polysulfone support membranes. Nanocomposite support membranes were formed from amorphous non-porous silica and crystalline microporous zeolite nanoparticles. For each hand-cast membrane, water flux and NaCl rejection were monitored over time at two different applied pressures. Nanocomposite-polysulfone supported RO membranes generally had higher initial permeability and experienced less flux decline due to compaction than pure polysulfone supported membranes. In addition, observed salt rejection tended to increase as flux declined from compaction. Crosssectional SEM images verified significant reduction in thickness of pure polysulfone supports, whereas nanocomposites better resisted compaction due to enhanced mechanical stability imparted by the nanoparticles. A conceptual model was proposed to explain the mechanistic relationship between support membrane compaction and observed changes in water flux and salt rejection. As the support membrane compacts, skin layer pore constriction increased the effective path length for diffusion through the composite membranes, which reduced both water and salt permeability identically. However, experimental salt permeability tended to decline to a greater extent than water permeability; hence, the observed changes in flux and rejection might also be related to structural changes in the polyamide thin film. © 2010 Elsevier B.V. All rights reserved.
Citation:
Pendergast MTM, Nygaard JM, Ghosh AK, Hoek EMV (2010) Using nanocomposite materials technology to understand and control reverse osmosis membrane compaction. Desalination 261: 255–263. Available: http://dx.doi.org/10.1016/j.desal.2010.06.008.
Publisher:
Elsevier BV
Journal:
Desalination
KAUST Grant Number:
KUS-C1-018-02
Issue Date:
Oct-2010
DOI:
10.1016/j.desal.2010.06.008
Type:
Article
ISSN:
0011-9164
Sponsors:
This publication is based on the work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST), in addition to the UCLA California NanoSystems Institute (CNSI) and NanoH2O Inc. Additional financial support for MTMP was provided by the UCLA Cota Robles Fellowship and the UCLA Faculty Women's Club Russell and Sallie O'Neill Memorial Scholarship, and for JMN by the Environmental Engineers for the Future funding program.
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorPendergast, Mary Theresa M.en
dc.contributor.authorNygaard, Jodie M.en
dc.contributor.authorGhosh, Asim K.en
dc.contributor.authorHoek, Eric M.V.en
dc.date.accessioned2016-02-28T06:43:50Zen
dc.date.available2016-02-28T06:43:50Zen
dc.date.issued2010-10en
dc.identifier.citationPendergast MTM, Nygaard JM, Ghosh AK, Hoek EMV (2010) Using nanocomposite materials technology to understand and control reverse osmosis membrane compaction. Desalination 261: 255–263. Available: http://dx.doi.org/10.1016/j.desal.2010.06.008.en
dc.identifier.issn0011-9164en
dc.identifier.doi10.1016/j.desal.2010.06.008en
dc.identifier.urihttp://hdl.handle.net/10754/600153en
dc.description.abstractComposite reverse osmosis (RO) membranes were formed by interfacial polymerization of polyamide thin films over pure polysulfone and nanocomposite-polysulfone support membranes. Nanocomposite support membranes were formed from amorphous non-porous silica and crystalline microporous zeolite nanoparticles. For each hand-cast membrane, water flux and NaCl rejection were monitored over time at two different applied pressures. Nanocomposite-polysulfone supported RO membranes generally had higher initial permeability and experienced less flux decline due to compaction than pure polysulfone supported membranes. In addition, observed salt rejection tended to increase as flux declined from compaction. Crosssectional SEM images verified significant reduction in thickness of pure polysulfone supports, whereas nanocomposites better resisted compaction due to enhanced mechanical stability imparted by the nanoparticles. A conceptual model was proposed to explain the mechanistic relationship between support membrane compaction and observed changes in water flux and salt rejection. As the support membrane compacts, skin layer pore constriction increased the effective path length for diffusion through the composite membranes, which reduced both water and salt permeability identically. However, experimental salt permeability tended to decline to a greater extent than water permeability; hence, the observed changes in flux and rejection might also be related to structural changes in the polyamide thin film. © 2010 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis publication is based on the work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST), in addition to the UCLA California NanoSystems Institute (CNSI) and NanoH2O Inc. Additional financial support for MTMP was provided by the UCLA Cota Robles Fellowship and the UCLA Faculty Women's Club Russell and Sallie O'Neill Memorial Scholarship, and for JMN by the Environmental Engineers for the Future funding program.en
dc.publisherElsevier BVen
dc.subjectCompactionen
dc.subjectDesalinationen
dc.subjectInterfacial polymerizationen
dc.subjectNanocompositeen
dc.subjectPhase inversionen
dc.subjectReverse osmosisen
dc.titleUsing nanocomposite materials technology to understand and control reverse osmosis membrane compactionen
dc.typeArticleen
dc.identifier.journalDesalinationen
dc.contributor.institutionUniversity of California, Los Angeles, Los Angeles, United Statesen
dc.contributor.institutionSanitation Districts of Los Angeles County, Whittier, United Statesen
dc.contributor.institutionBhabha Atomic Research Centre, Mumbai, Indiaen
kaust.grant.numberKUS-C1-018-02en
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