Preparation and water desalination properties of POSS-polyamide nanocomposite reverse osmosis membranes

Handle URI:
http://hdl.handle.net/10754/563972
Title:
Preparation and water desalination properties of POSS-polyamide nanocomposite reverse osmosis membranes
Authors:
Duan, Jintang ( 0000-0003-0878-0032 ) ; Litwiller, Eric ( 0000-0001-5366-0967 ) ; Pinnau, Ingo ( 0000-0003-3040-9088 )
Abstract:
The application of nanotechnology to thin-film nanocomposites (TFN) is a new route to enhance membrane performance in water desalination. Here, the potential of polyhedral oligomeric silsesquioxane (POSS) as the nanofiller in polyamide (PA) reverse osmosis membranes was systematically investigated. Four POSS materials (P-8Phenyl, P-8NH3Cl, P-8NH2 and P-1NH2) were introduced into the selective layer by physical blending or chemical fixation during standard interfacial polymerization. Water flux and NaCl rejection were measured with 2000ppm NaCl solution under 15.5bar pressure, and SEM and TEM images of membrane selective layers were obtained. Membranes prepared without POSS showed water flux of 20.0±0.5L/m2·h and salt rejection of 98.0±0.2%. TFN membranes prepared with 0.4% (w/v) P-8Phenyl in the organic phase showed a 65% increase in water flux compared to the pristine PA membrane while maintaining high salt rejection. The selective layer of this membrane maintained the typical ridge-and-valley structure of aromatic PA. Results with P-8NH3Cl and P-8NH2 added to the organic phase were similar. TFN membranes prepared with monoamine P-1NH2 in the organic phase had poor water flux of 3.2L/m2·h, a smooth and more hydrophobic surface, and a much thicker (~400nm) selective layer. One of the four POSS compounds studied, P-8NH3Cl, is sufficiently soluble in water for incorporation into the selective layer via the aqueous phase. Membranes were prepared with P-8NH3Cl in the aqueous phase at varying reaction time, loading, and additive (triethylamine) concentration. With these parameters optimized, water flux increased to 35.4L/m2·h.
KAUST Department:
Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; Chemical and Biological Engineering Program
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
Jan-2015
DOI:
10.1016/j.memsci.2014.09.022
Type:
Article
ISSN:
03767388
Sponsors:
Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). The authors are grateful to Dr. Federico Pacheco for valuable discussions. The authors also acknowledge Dr. Lan Zhao, Dr. Rachid Sougrat, Mr. Guangchao Wang, and Dr. Mohamed Hedhili from the KAUST Advanced Nanofabrication Imaging and Characterization Core Lab for assistance.
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center; Physical Sciences and Engineering (PSE) Division; Chemical and Biological Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorDuan, Jintangen
dc.contributor.authorLitwiller, Ericen
dc.contributor.authorPinnau, Ingoen
dc.date.accessioned2015-08-03T12:21:26Zen
dc.date.available2015-08-03T12:21:26Zen
dc.date.issued2015-01en
dc.identifier.issn03767388en
dc.identifier.doi10.1016/j.memsci.2014.09.022en
dc.identifier.urihttp://hdl.handle.net/10754/563972en
dc.description.abstractThe application of nanotechnology to thin-film nanocomposites (TFN) is a new route to enhance membrane performance in water desalination. Here, the potential of polyhedral oligomeric silsesquioxane (POSS) as the nanofiller in polyamide (PA) reverse osmosis membranes was systematically investigated. Four POSS materials (P-8Phenyl, P-8NH3Cl, P-8NH2 and P-1NH2) were introduced into the selective layer by physical blending or chemical fixation during standard interfacial polymerization. Water flux and NaCl rejection were measured with 2000ppm NaCl solution under 15.5bar pressure, and SEM and TEM images of membrane selective layers were obtained. Membranes prepared without POSS showed water flux of 20.0±0.5L/m2·h and salt rejection of 98.0±0.2%. TFN membranes prepared with 0.4% (w/v) P-8Phenyl in the organic phase showed a 65% increase in water flux compared to the pristine PA membrane while maintaining high salt rejection. The selective layer of this membrane maintained the typical ridge-and-valley structure of aromatic PA. Results with P-8NH3Cl and P-8NH2 added to the organic phase were similar. TFN membranes prepared with monoamine P-1NH2 in the organic phase had poor water flux of 3.2L/m2·h, a smooth and more hydrophobic surface, and a much thicker (~400nm) selective layer. One of the four POSS compounds studied, P-8NH3Cl, is sufficiently soluble in water for incorporation into the selective layer via the aqueous phase. Membranes were prepared with P-8NH3Cl in the aqueous phase at varying reaction time, loading, and additive (triethylamine) concentration. With these parameters optimized, water flux increased to 35.4L/m2·h.en
dc.description.sponsorshipResearch reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). The authors are grateful to Dr. Federico Pacheco for valuable discussions. The authors also acknowledge Dr. Lan Zhao, Dr. Rachid Sougrat, Mr. Guangchao Wang, and Dr. Mohamed Hedhili from the KAUST Advanced Nanofabrication Imaging and Characterization Core Lab for assistance.en
dc.publisherElsevier BVen
dc.subjectDesalinationen
dc.subjectInterfacial polymerizationen
dc.subjectPOSSen
dc.subjectReverse osmosisen
dc.subjectThin-film-nanocompositeen
dc.titlePreparation and water desalination properties of POSS-polyamide nanocomposite reverse osmosis membranesen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical and Biological Engineering Programen
dc.identifier.journalJournal of Membrane Scienceen
kaust.authorDuan, Jintangen
kaust.authorLitwiller, Ericen
kaust.authorPinnau, Ingoen
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