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Pore-size-controlled silica membranes with disiloxane alkoxides for gas separation

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Title: Pore-size-controlled silica membranes with disiloxane alkoxides for gas separation
Authors: Lee, Hye Ryeon1, Shibata, Toshinobu1, Kanezashi, Masakoto1, Mizumo, Tomonobu2, Ohshita, Joji2, Tsuru, Toshinori1 tsuru@hiroshima-u.ac.jp
Source: Journal of Membrane Science. Nov2011, Vol. 383 Issue 1/2, p152-158. 7p.
Subjects: Porous silicon, Silica, Artificial membranes, Siloxanes, Alkoxides, Separation of gases
Abstract: Abstract: Pore-size-controlled silica membranes were prepared using hexaethoxy disiloxane (HEDS) by a “spacer” technique, which is a novel strategy to control the pore size of silica membranes using bridged alkoxides. HEDS-derived silica gel powders prepared with acid and base catalysts were microporous and mesoporous, respectively. HEDS-derived silica membranes prepared from HCl-catalyzed sol showed high H2 permeance (0.73–2.0×10−6 molm−2 s−1 Pa−1) with low H2/N2 (∼20) and high H2/SF6 perm-selectivity (∼2000). Pore size by single gas permeation and normalized Knudsen-based permeance (NKP) showed that silica membranes with bridged alkoxides had a loose amorphous silica structure. Judging from NKP fitting curves for tetraethylorthosilicate (TEOS), HEDS, tetraethoxydimethyl disiloxane (TEDMDS), and bis(triethoxysilyl) ethane (BTESE)-derived silica membranes, the order was TEOS
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.)
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  Data: Pore-size-controlled silica membranes with disiloxane alkoxides for gas separation
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  Data: <searchLink fieldCode="AR" term="%22Lee%2C+Hye+Ryeon%22">Lee, Hye Ryeon</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Shibata%2C+Toshinobu%22">Shibata, Toshinobu</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kanezashi%2C+Masakoto%22">Kanezashi, Masakoto</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mizumo%2C+Tomonobu%22">Mizumo, Tomonobu</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Ohshita%2C+Joji%22">Ohshita, Joji</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Tsuru%2C+Toshinori%22">Tsuru, Toshinori</searchLink><relatesTo>1</relatesTo><i> tsuru@hiroshima-u.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Membrane+Science%22">Journal of Membrane Science</searchLink>. Nov2011, Vol. 383 Issue 1/2, p152-158. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Porous+silicon%22">Porous silicon</searchLink><br /><searchLink fieldCode="DE" term="%22Silica%22">Silica</searchLink><br /><searchLink fieldCode="DE" term="%22Artificial+membranes%22">Artificial membranes</searchLink><br /><searchLink fieldCode="DE" term="%22Siloxanes%22">Siloxanes</searchLink><br /><searchLink fieldCode="DE" term="%22Alkoxides%22">Alkoxides</searchLink><br /><searchLink fieldCode="DE" term="%22Separation+of+gases%22">Separation of gases</searchLink>
– Name: Abstract
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  Data: Abstract: Pore-size-controlled silica membranes were prepared using hexaethoxy disiloxane (HEDS) by a “spacer” technique, which is a novel strategy to control the pore size of silica membranes using bridged alkoxides. HEDS-derived silica gel powders prepared with acid and base catalysts were microporous and mesoporous, respectively. HEDS-derived silica membranes prepared from HCl-catalyzed sol showed high H2 permeance (0.73–2.0×10−6 molm−2 s−1 Pa−1) with low H2/N2 (∼20) and high H2/SF6 perm-selectivity (∼2000). Pore size by single gas permeation and normalized Knudsen-based permeance (NKP) showed that silica membranes with bridged alkoxides had a loose amorphous silica structure. Judging from NKP fitting curves for tetraethylorthosilicate (TEOS), HEDS, tetraethoxydimethyl disiloxane (TEDMDS), and bis(triethoxysilyl) ethane (BTESE)-derived silica membranes, the order was TEOS<HEDS<BTESE≈TEDMDS. These results suggested that the pore size of silica membranes can be tuned with various structured alkoxides of di-silicon. [Copyright &y& Elsevier]
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  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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      – Type: doi
        Value: 10.1016/j.memsci.2011.08.046
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 7
        StartPage: 152
    Subjects:
      – SubjectFull: Porous silicon
        Type: general
      – SubjectFull: Silica
        Type: general
      – SubjectFull: Artificial membranes
        Type: general
      – SubjectFull: Siloxanes
        Type: general
      – SubjectFull: Alkoxides
        Type: general
      – SubjectFull: Separation of gases
        Type: general
    Titles:
      – TitleFull: Pore-size-controlled silica membranes with disiloxane alkoxides for gas separation
        Type: main
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            NameFull: Lee, Hye Ryeon
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            NameFull: Shibata, Toshinobu
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            NameFull: Kanezashi, Masakoto
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            NameFull: Mizumo, Tomonobu
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            NameFull: Ohshita, Joji
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            – D: 01
              M: 11
              Text: Nov2011
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              Y: 2011
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              Value: 383
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            – TitleFull: Journal of Membrane Science
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