Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process
A facile method to coat carbon fibers with a silica shell is presented in this work. By immobilizing linear polyamines on the carbon fiber surface, the high catalytic activity of polyamines in the sol–gel-processing of silica precursors is used to deposit a silica coating directly on the fiber’s sur...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2017-05-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.8.116 |
| _version_ | 1818178134527180800 |
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| author | Benjamin Baumgärtner Hendrik Möller Thomas Neumann Dirk Volkmer |
| author_facet | Benjamin Baumgärtner Hendrik Möller Thomas Neumann Dirk Volkmer |
| author_sort | Benjamin Baumgärtner |
| collection | DOAJ |
| description | A facile method to coat carbon fibers with a silica shell is presented in this work. By immobilizing linear polyamines on the carbon fiber surface, the high catalytic activity of polyamines in the sol–gel-processing of silica precursors is used to deposit a silica coating directly on the fiber’s surface. The surface localization of the catalyst is achieved either by attaching short-chain polyamines (e.g., tetraethylenepentamine) via covalent bonds to the carbon fiber surface or by depositing long-chain polyamines (e.g., linear poly(ethylenimine)) on the carbon fiber by weak non-covalent bonding. The long-chain polyamine self-assembles onto the carbon fiber substrate in the form of nanoscopic crystallites, which serve as a template for the subsequent silica deposition. The silicification at close to neutral pH is spatially restricted to the localized polyamine and consequently to the fiber surface. In case of the linear poly(ethylenimine), silica shells of several micrometers in thickness can be obtained and their morphology is easily controlled by a considerable number of synthesis parameters. A unique feature is the hierarchical biomimetic structure of the silica coating which surrounds the embedded carbon fiber by fibrillar and interconnected silica fine-structures. The high surface area of the nanostructured composite fiber may be exploited for catalytic applications and adsorption purposes. |
| first_indexed | 2024-12-11T20:43:09Z |
| format | Article |
| id | doaj.art-58c74f1ff3264317a353a2e02fcfd16e |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-11T20:43:09Z |
| publishDate | 2017-05-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-58c74f1ff3264317a353a2e02fcfd16e2022-12-22T00:51:27ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862017-05-01811145115510.3762/bjnano.8.1162190-4286-8-116Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly processBenjamin Baumgärtner0Hendrik Möller1Thomas Neumann2Dirk Volkmer3Chair of Solid State and Materials Chemistry, University of Augsburg, 86159 Augsburg, GermanySchwenk Zement KG, Ulm 89077, GermanySchwenk Zement KG, 97753 Karlstadt, GermanyChair of Solid State and Materials Chemistry, University of Augsburg, 86159 Augsburg, GermanyA facile method to coat carbon fibers with a silica shell is presented in this work. By immobilizing linear polyamines on the carbon fiber surface, the high catalytic activity of polyamines in the sol–gel-processing of silica precursors is used to deposit a silica coating directly on the fiber’s surface. The surface localization of the catalyst is achieved either by attaching short-chain polyamines (e.g., tetraethylenepentamine) via covalent bonds to the carbon fiber surface or by depositing long-chain polyamines (e.g., linear poly(ethylenimine)) on the carbon fiber by weak non-covalent bonding. The long-chain polyamine self-assembles onto the carbon fiber substrate in the form of nanoscopic crystallites, which serve as a template for the subsequent silica deposition. The silicification at close to neutral pH is spatially restricted to the localized polyamine and consequently to the fiber surface. In case of the linear poly(ethylenimine), silica shells of several micrometers in thickness can be obtained and their morphology is easily controlled by a considerable number of synthesis parameters. A unique feature is the hierarchical biomimetic structure of the silica coating which surrounds the embedded carbon fiber by fibrillar and interconnected silica fine-structures. The high surface area of the nanostructured composite fiber may be exploited for catalytic applications and adsorption purposes.https://doi.org/10.3762/bjnano.8.116biomimetic silicificationcarbon fiberself-assemblysilica nanotubessol–gel process |
| spellingShingle | Benjamin Baumgärtner Hendrik Möller Thomas Neumann Dirk Volkmer Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process Beilstein Journal of Nanotechnology biomimetic silicification carbon fiber self-assembly silica nanotubes sol–gel process |
| title | Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process |
| title_full | Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process |
| title_fullStr | Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process |
| title_full_unstemmed | Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process |
| title_short | Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process |
| title_sort | preparation of thick silica coatings on carbon fibers with fine structured silica nanotubes induced by a self assembly process |
| topic | biomimetic silicification carbon fiber self-assembly silica nanotubes sol–gel process |
| url | https://doi.org/10.3762/bjnano.8.116 |
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