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    Functionalized Nanochannels from Self-Assembled and Photomodified Poly(Styrene-b -Butadiene-b -Styrene)

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    burhan-sbs-Jul20.pdf
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    Type
    Article
    Authors
    Sutisna, Burhannudin cc
    Polymeropoulos, George cc
    Musteata, Valentina-Elena
    Sougrat, Rachid cc
    Smilgies, Detlef-M. cc
    Peinemann, Klaus-Viktor cc
    Hadjichristidis, Nikolaos cc
    Nunes, Suzana Pereira cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Biological and Environmental Sciences and Engineering (BESE) Division
    Chemical Science Program
    Chemical and Biological Engineering Program
    Electron Microscopy
    Environmental Science and Engineering Program
    Imaging and Characterization Core Lab
    KAUST Catalysis Center (KCC)
    Nanofabrication Core Lab
    Physical Sciences and Engineering (PSE) Division
    Water Desalination and Reuse Research Center (WDRC)
    KAUST Grant Number
    1671 – CRG2
    Date
    2017-10-04
    Permanent link to this record
    http://hdl.handle.net/10754/625830
    
    Metadata
    Show full item record
    Abstract
    Membranes are prepared by self-assembly and casting of 5 and 13 wt% poly(styrene-b-butadiene-b-styrene) (PS-b-PB-b-PS) copolymers solutions in different solvents, followed by immersion in water or ethanol. By controlling the solution-casting gap, porous films of 50 and 1 µm thickness are obtained. A gradient of increasing pore size is generated as the distance from the surface increased. An ordered porous surface layer with continuous nanochannels can be observed. Its formation is investigated, by using time-resolved grazing incident small angle X-ray scattering, electron microscopy, and rheology, suggesting a strong effect of the air-solution interface on the morphology formation. The thin PS-b-PB-b-PS ordered films are modified, by promoting the photolytic addition of thioglycolic acid to the polybutadiene groups, adding chemical functionality and specific transport characteristics on the preformed nanochannels, without sacrificing the membrane morphology. Photomodification increases fivefold the water permeance to around 2 L m(-2) h(-1) bar(-1) , compared to that of the unmodified one. A rejection of 74% is measured for methyl orange in water. The membranes fabrication with tailored nanochannels and chemical functionalities can be demonstrated using relatively lower cost block copolymers. Casting on porous polyacrylonitrile supports makes the membranes even more scalable and competitive in large scale.
    Citation
    Sutisna B, Polymeropoulos G, Musteata V, Sougrat R, Smilgies D-M, et al. (2017) Functionalized Nanochannels from Self-Assembled and Photomodified Poly(Styrene-b -Butadiene-b -Styrene). Small: 1701885. Available: http://dx.doi.org/10.1002/smll.201701885.
    Sponsors
    This work was sponsored by the King Abdullah University of Science and Technology (KAUST) Grant 1671 – CRG2. The authors thank Christopher Waldron, Nimer Wehbe, and Mohamed Nejib Hedhili for the assistance on the XPS measurements, as well as Alessandro Genovese for the EFTEM and STEM–EELS analysis, and Long Chen for the assistance in the AFM measurements. The authors acknowledge Cornell High Energy Synchrotron Source (CHESS) in USA and Laboratório Nacional de Luz Síncrotron (LNLS) in Brazil for the access to the GISAXS and SAXS synchrotron facilities. The authors thank Florian Meneau and Tiago Araujo Kakile at LNLS for their support at the SAXS1 beamline. CHESS was supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under NSF award DMR-1332208.
    Publisher
    Wiley
    Journal
    Small
    DOI
    10.1002/smll.201701885
    PubMed ID
    28977736
    Additional Links
    http://onlinelibrary.wiley.com/doi/10.1002/smll.201701885/abstract
    ae974a485f413a2113503eed53cd6c53
    10.1002/smll.201701885
    Scopus Count
    Collections
    Nanofabrication Core Lab; Nanofabrication Core Lab; Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Advanced Membranes and Porous Materials Research Center; Environmental Science and Engineering Program; Environmental Science and Engineering Program; Imaging and Characterization Core Lab; Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; Chemical Science Program; Chemical and Biological Engineering Program; Chemical and Biological Engineering Program; KAUST Catalysis Center (KCC); KAUST Catalysis Center (KCC); Water Desalination and Reuse Research Center (WDRC); Water Desalination and Reuse Research Center (WDRC)

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