Highly Hydrophilic Thin-Film Composite Forward Osmosis Membranes Functionalized with Surface-Tailored Nanoparticles
KAUST Grant NumberKUS-C1-018-02
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AbstractThin-film composite polyamide membranes are state-of-the-art materials for membrane-based water purification and desalination processes, which require both high rejection of contaminants and high water permeabilities. However, these membranes are prone to fouling when processing natural waters and wastewaters, because of the inherent surface physicochemical properties of polyamides. The present work demonstrates the fabrication of forward osmosis polyamide membranes with optimized surface properties via facile and scalable functionalization with fine-tuned nanoparticles. Silica nanoparticles are coated with superhydrophilic ligands possessing functional groups that impart stability to the nanoparticles and bind irreversibly to the native carboxyl moieties on the membrane selective layer. The tightly tethered layer of nanoparticles tailors the surface chemistry of the novel composite membrane without altering the morphology or water/solute permeabilities of the membrane selective layer. Surface characterization and interfacial energy analysis confirm that highly hydrophilic and wettable membrane surfaces are successfully attained. Lower intermolecular adhesion forces are measured between the new membrane materials and model organic foulants, indicating the presence of a bound hydration layer at the polyamide membrane surface that creates a barrier for foulant adhesion. © 2012 American Chemical Society.
CitationTiraferri A, Kang Y, Giannelis EP, Elimelech M (2012) Highly Hydrophilic Thin-Film Composite Forward Osmosis Membranes Functionalized with Surface-Tailored Nanoparticles. ACS Applied Materials & Interfaces 4: 5044–5053. Available: http://dx.doi.org/10.1021/am301532g.
SponsorsThis publication is based on work supported by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST). We also acknowledge the NWRI-AMTA Fellowship for Membrane Technology, awarded to A.T.
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
- Superhydrophilic thin-film composite forward osmosis membranes for organic fouling control: fouling behavior and antifouling mechanisms.
- Authors: Tiraferri A, Kang Y, Giannelis EP, Elimelech M
- Issue date: 2012 Oct 16
- Highly hydrophilic polyvinylidene fluoride (PVDF) ultrafiltration membranes via postfabrication grafting of surface-tailored silica nanoparticles.
- Authors: Liang S, Kang Y, Tiraferri A, Giannelis EP, Huang X, Elimelech M
- Issue date: 2013 Jul 24
- Organic fouling of thin-film composite polyamide and cellulose triacetate forward osmosis membranes by oppositely charged macromolecules.
- Authors: Gu Y, Wang YN, Wei J, Tang CY
- Issue date: 2013 Apr 1
- Improved antifouling properties of polyamide nanofiltration membranes by reducing the density of surface carboxyl groups.
- Authors: Mo Y, Tiraferri A, Yip NY, Adout A, Huang X, Elimelech M
- Issue date: 2012 Dec 18
- In situ surface chemical modification of thin-film composite forward osmosis membranes for enhanced organic fouling resistance.
- Authors: Lu X, Romero-Vargas Castrillón S, Shaffer DL, Ma J, Elimelech M
- Issue date: 2013