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Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization.

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Title: Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization.
Authors: Liu, Guanhua1,2, Jiang, Zhongyi1,2, Cheng, Xuanxuan1,2, Chen, Cheng1,2, Yang, Hao1,2, Wu, Hong1,2, Pan, Fusheng1,2 fspan@tju.edu.cn, Zhang, Peng3,4, Cao, Xingzhong3,4
Source: Journal of Membrane Science. Dec2016, Vol. 520, p364-373. 10p.
Subjects: Membrane selectivity (Technology), Silica nanoparticles, Biomineralization, Polyethyleneimine, Sodium alginate
Abstract: Layer-by-layer (LbL) assembly is a common method for controlled fabrication of ultrathin membranes, while bioinspired mineralization is a novel method for controlled synthesis of well-dispersed inorganic particles in hybrid membranes. Here, bioinspired mineralization was integrated with LbL assembly to prepare ultrathin polymer-inorganic hybrid membranes by in situ precipitating silica nanoparticles into alternatively assembled polyethyleneimine (PEI) and sodium alginate (Alg). The membrane thickness was manipulated by varying the bilayer numbers. And the synthesized silica nanoparticles were revealed by the surface morphology, Si mapping and chemical properties of the membranes. The surface hydrophilicity, diffusion selectivity and the fractional free volume of the hybrid membranes were all enhanced by the incorporation of silica nanoparticles. As a result, the ultrathin hybrid membrane showed elevated selectivity (2.66-fold higher than that of control membrane) with almost unchanged permeability when used for pervaporation dehydration of 90 wt% ethanol aqueous solution as a model mixture. This study indicates the great potential for overcoming the tradeoff hurdle between permeability and selectivity by the synergy of LbL assembly and bioinspired mineralization to fabricate ultrathin hybrid membranes. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Membrane Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 118179015
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Guanhua%22">Liu, Guanhua</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Jiang%2C+Zhongyi%22">Jiang, Zhongyi</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Cheng%2C+Xuanxuan%22">Cheng, Xuanxuan</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Cheng%22">Chen, Cheng</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Yang%2C+Hao%22">Yang, Hao</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wu%2C+Hong%22">Wu, Hong</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Pan%2C+Fusheng%22">Pan, Fusheng</searchLink><relatesTo>1,2</relatesTo><i> fspan@tju.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Peng%22">Zhang, Peng</searchLink><relatesTo>3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Cao%2C+Xingzhong%22">Cao, Xingzhong</searchLink><relatesTo>3,4</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Membrane+Science%22">Journal of Membrane Science</searchLink>. Dec2016, Vol. 520, p364-373. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Membrane+selectivity+%28Technology%29%22">Membrane selectivity (Technology)</searchLink><br /><searchLink fieldCode="DE" term="%22Silica+nanoparticles%22">Silica nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Biomineralization%22">Biomineralization</searchLink><br /><searchLink fieldCode="DE" term="%22Polyethyleneimine%22">Polyethyleneimine</searchLink><br /><searchLink fieldCode="DE" term="%22Sodium+alginate%22">Sodium alginate</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Layer-by-layer (LbL) assembly is a common method for controlled fabrication of ultrathin membranes, while bioinspired mineralization is a novel method for controlled synthesis of well-dispersed inorganic particles in hybrid membranes. Here, bioinspired mineralization was integrated with LbL assembly to prepare ultrathin polymer-inorganic hybrid membranes by in situ precipitating silica nanoparticles into alternatively assembled polyethyleneimine (PEI) and sodium alginate (Alg). The membrane thickness was manipulated by varying the bilayer numbers. And the synthesized silica nanoparticles were revealed by the surface morphology, Si mapping and chemical properties of the membranes. The surface hydrophilicity, diffusion selectivity and the fractional free volume of the hybrid membranes were all enhanced by the incorporation of silica nanoparticles. As a result, the ultrathin hybrid membrane showed elevated selectivity (2.66-fold higher than that of control membrane) with almost unchanged permeability when used for pervaporation dehydration of 90 wt% ethanol aqueous solution as a model mixture. This study indicates the great potential for overcoming the tradeoff hurdle between permeability and selectivity by the synergy of LbL assembly and bioinspired mineralization to fabricate ultrathin hybrid membranes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Membrane Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.memsci.2016.07.056
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 364
    Subjects:
      – SubjectFull: Membrane selectivity (Technology)
        Type: general
      – SubjectFull: Silica nanoparticles
        Type: general
      – SubjectFull: Biomineralization
        Type: general
      – SubjectFull: Polyethyleneimine
        Type: general
      – SubjectFull: Sodium alginate
        Type: general
    Titles:
      – TitleFull: Elevating the selectivity of layer-by-layer membranes by in situ bioinspired mineralization.
        Type: main
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            NameFull: Liu, Guanhua
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            NameFull: Jiang, Zhongyi
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            NameFull: Cheng, Xuanxuan
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            NameFull: Chen, Cheng
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            NameFull: Yang, Hao
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            NameFull: Wu, Hong
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            NameFull: Pan, Fusheng
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            NameFull: Cao, Xingzhong
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            – D: 15
              M: 12
              Text: Dec2016
              Type: published
              Y: 2016
          Identifiers:
            – Type: issn-print
              Value: 03767388
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            – Type: volume
              Value: 520
          Titles:
            – TitleFull: Journal of Membrane Science
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