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    Carboxyl-functionalized nanochannels based on block copolymer hierarchical structures

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    Type
    Article
    Authors
    Musteata, Valentina-Elena
    Chisca, Stefan
    Meneau, Florian
    Smilgies, Detlef-M.
    Nunes, Suzana Pereira cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Date
    2018
    Permanent link to this record
    http://hdl.handle.net/10754/630437
    
    Metadata
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    Abstract
    When building artificial nanochannels, having a scalable robust platform with controlled morphology is important, as well as having the option for final functionalization of the channels for the selective transport of water and proteins. We have previously developed asymmetric membranes that have a surface layer of very sharp pore size distribution, surface charge and pore functionalization. Here, a more complex bioinspired platform is reported. Hierarchical isotropic porous structures with spherical micrometer-sized cavities, interconnected by hexagonally ordered nanochannels, were prepared based on the phase separation of polystyrene-b-poly(t-butyl acrylate) block copolymers, following a nucleation and growth mechanism. The structure was imaged by scanning electron microscopy, which demonstrated a high density of ordered nanochannels. The hexagonal order formed by the self-assembly in solution was confirmed by small-angle X-ray scattering. The structure evolution was investigated by time-resolved grazing-incidence small-angle X-ray scattering. The assembled hydrophobic hierarchical structure was then converted to a hydrophilic structure by acid hydrolysis, leading to nanochannels covered by carboxylic groups and therefore convenient for water transport.
    Citation
    Musteata V-E, Chisca S, Meneau F, Smilgies D-M, Nunes SP (2018) Carboxyl-functionalized nanochannels based on block copolymer hierarchical structures. Faraday Discussions 209: 303–314. Available: http://dx.doi.org/10.1039/c8fd00015h.
    Sponsors
    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 and the support at the 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
    Royal Society of Chemistry (RSC)
    Journal
    Faraday Discussions
    DOI
    10.1039/c8fd00015h
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2018/FD/C8FD00015H#!divAbstract
    ae974a485f413a2113503eed53cd6c53
    10.1039/c8fd00015h
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program

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