DE102007002594A1 - Shaped product useful as a high-temperature insulating material comprises a porous carbon-containing aerogel with a covering layer on at least one side - Google Patents
Shaped product useful as a high-temperature insulating material comprises a porous carbon-containing aerogel with a covering layer on at least one side Download PDFInfo
- Publication number
- DE102007002594A1 DE102007002594A1 DE200710002594 DE102007002594A DE102007002594A1 DE 102007002594 A1 DE102007002594 A1 DE 102007002594A1 DE 200710002594 DE200710002594 DE 200710002594 DE 102007002594 A DE102007002594 A DE 102007002594A DE 102007002594 A1 DE102007002594 A1 DE 102007002594A1
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- Germany
- Prior art keywords
- shaped body
- inorganic
- body according
- lamination
- cover layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Die Erfindung betrifft eine kohlenstoffhaltige Aerogelplatte mit wenigstens einer ein- oder beidseitig aufgebrachten Deckschicht sowie ein Verfahren zu deren Herstellung.The The invention relates to a carbonaceous airgel plate with at least a one or both sides applied topcoat and a method to their production.
[Stand der Technik][State of the art]
Seit
Mitte der Achtziger Jahre werden Kohlenstoff-Aerogele durch Pyrolyse
von Resorcin-Formaldehyd-Precursoren hergestellt. Diese organischen
Aerogele werden durch eine basisch katalysierte Polykondensation
von Resorcinol (1,3-Dihydroxy-Benzen) mit Formaldehyd in einer wässrigen Lösung
hergestellt [
Zur
thermischen Isolation bei hohen Temperaturen kommen häufig
Matten, Filze oder Vliese aus verschiedenen temperaturbeständigen
Materialien zum Einsatz. Die Firma Kynol stellt aus Phenolharzfäden
[
Die Verwendung von solchen Sandwichelementen bestehend aus einem gut wärmedämmenden Kern und einer entweder mechanisch oder thermisch stabilisierenden Deckschicht sind Stand der Technik. Die Verbindung der Einzelwerkstoffe reicht von Verkleben der Deckschicht bis hin zu Aufschlämmen des späteren Deckschichtmaterials.The Use of such sandwich elements consisting of a good heat-insulating core and one either mechanical or thermally stabilizing topcoat are prior art. The bonding of the individual materials ranges from bonding the cover layer to slurries of the later covering layer material.
[Beschreibung der Erfindung]DESCRIPTION OF THE INVENTION
Die vorliegende Erfindung besteht nach der Pyrolyse aus einem kohlenstoffhaltigen Aerogelmonolithen mit einer ein- oder beidseitig aufgebrachten Deckschicht. Zum einen dient die Deckschicht zur mechanischen Stabilisierung des Aerogel-Formkörpers und verändert die tribologischen Eigenschaften an der Oberfläche des Formkörpers. Das Reibungs-, Verschleiß- und Schmierverhalten wird durch die Eigenschaften der Deckschicht bestimmt. Zum anderen beeinflusst die Deckschicht die thermische und elektrische Leitfähigkeit parallel zur Oberfläche des Formkörpers. Eine beispielsweise Kohlenstofffasern enthaltende Deckschicht hat sowohl eine hohe thermische als auch elektrische Leitfähigkeit in Faserrichtung. Dies bringt den Vorteil lokal auftretende Wärmequellen, z. B. Hot Spots, durch die gute Querleitfähigkeit der Decksicht entlang der Oberfläche abführen zu können und dies bei gleichzeitig guter Wärmedämmung des Trägermaterials senkrecht dazu. Daraus ergibt sich eine große Temperaturhomogenität im thermisch isolierten Raum. Dieselben Vorteile zeigen sich auch hinsichtlich der elektrischen Leitfähigkeit.The The present invention, after pyrolysis, consists of a carbonaceous material Airgel monoliths with a cover layer applied on one or both sides. On the one hand, the cover layer serves for mechanical stabilization of the airgel-shaped body and changes the tribological Properties on the surface of the molding. The friction, wear and lubricating behavior is through determines the properties of the topcoat. On the other hand influenced the topcoat the thermal and electrical conductivity parallel to the surface of the molding. A For example, carbon fiber-containing cover layer has both a high thermal as well as electrical conductivity in the fiber direction. This has the advantage of locally occurring heat sources, z. As hot spots, by the good transverse conductivity of the deck view to dissipate along the surface and this with good thermal insulation of the same time Carrier material perpendicular thereto. This results in a great temperature homogeneity in the thermally isolated Room. The same advantages are also apparent with regard to the electrical Conductivity.
Die
vorliegende Erfindung erreicht eine deutlich geringere Wärmeleitfähigkeit
als die besten kommerziell erhältlichen Hochtemperaturmaterialien
bei gleichzeitig sowohl hoher thermischer als auch mechanischer
Stabilität. In
Das
Verfahren zur Herstellung des Formkörpers beinhaltet den
Aufbau eines Sandwichelementes und die anschließende Pyrolyse
des Gesamtelements. Hierfür wird ein Resorcin-Formaldehyd-Aerogel-Formkörper
(
Der Aufbau des Formkörpers ist auch aus einem pyrolysierten, nanoporösen Kern und einer temperaturbeständigen Deckschicht möglich. Dazu wird ein Kohlenstoff-Aerogel-Formkörper (pyrolysiertes Resorcin-Formaldehyd-Aerogel) mit einer temperaturbeständigen Kaschierung verbunden. Dies erfolgt über einen organischen Haftvermittler und erneuter Pyrolyse oder einen anorganischen Haftvermittler, z. B. auf SiO2-Basis. Darüber hinaus sind auch organisch modifizierte anorganische oder anorganisch modifizierte organische Haftvermittler einsetzbar.The structure of the shaped body is also possible from a pyrolyzed, nanoporous core and a temperature-resistant cover layer. For this purpose, a carbon airgel molded body (pyrolyzed resorcinol-formaldehyde airgel) is connected to a temperature-resistant lamination. This is done via an organic adhesion promoter and renewed pyrolysis or an inorganic adhesion promoter, for. B. based on SiO 2 . In addition, organically modified inorganic or inorganic modified organic adhesion promoters can be used.
Durch entsprechende Anwendung des Haftvermittlers bzw. entsprechendes Deckschichtmaterial lässt sich auch eine gasdiffusionsdichte bzw. gasdiffusionshemmende Schicht herstellen. Hierfür kann beispielsweise auf ein Kaschiermaterial verzichtet werden und nur ein Haftvermittler zur Schichtenbildung verwendet werden. Ein SiO2-haltiger Haftvermittler führt durch Pyrolyse zu einer SiC-haltigen Oxidationsschutzschicht, welche den Kohlenstoff-Formkörper bei Temperaturen über 500°C unter Sauerstoff vor einem Abbrand schützt.By appropriate application of the adhesion promoter or corresponding cover layer material, it is also possible to produce a gas diffusion-proof or gas diffusion-inhibiting layer. For this purpose, for example, can be dispensed with a laminating and only an adhesion promoter for layering can be used. A SiO 2 -containing adhesion promoter leads by pyrolysis to an SiC-containing oxidation protection layer, which protects the carbon molding at temperatures above 500 ° C under oxygen from burning.
Ein anderes Verfahren zur Herstellung der Funktionsschicht ist die Gasabscheidung (CVD, Chemical Vapor Deposition) auf dem Kohlenstoff-Aerogel. Bei Verwendung von Methan oder Propan entsteht eine Deckschicht aus reinem Kohlenstoff, bei Verwendung von Siliziumtetrachlorid entsteht eine SiC-haltige Deckschicht.One Another method for producing the functional layer is gas separation (CVD, Chemical Vapor Deposition) on the carbon airgel. at Use of methane or propane produces a topcoat pure carbon, produced by using silicon tetrachloride a SiC-containing topcoat.
Aufgrund der Herstellungsverfahren ist es somit möglich Kohlenstoff-Aerogele ohne Faserverstärkung im Volumen des Formkörpers zu verwenden, das heißt die gewünschte niedrige Wärmeleitfähigkeit des Gesamtsystems wird in Richtung der Temperaturgradienten senkrecht zur Platte nicht erhöht.by virtue of The manufacturing process, it is thus possible carbon aerogels without fiber reinforcement in the volume of the molding to use, that is the desired low Thermal conductivity of the entire system is in the direction the temperature gradient perpendicular to the plate is not increased.
[Ausführungsbeispiel 1][Embodiment 1]
Eine
Resorcin-Formaldehyd-Platte (
[Ausführungsbeispiel 2][Embodiment 2]
Eine
Resorcin-Formaldehyd-Platte (
- 11
- Formkörper aus Resorcin-Formaldehyd-Aerogelmoldings from resorcinol-formaldehyde airgel
- 22
- Kleber (z. B. Phenolharz)Glue (eg phenolic resin)
- 33
- Kaschiermaterial (Vlies, Gewebe) oder Funktionspartikel (Fasern, Pulver)laminating material (Fleece, fabric) or functional particles (fibers, powders)
- 44
- KohlenstoffclusterCarbon clusters
- 55
- Funktionspartikelfunctional particles
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 2331213 C3 [0003] - DE 2331213 C3 [0003]
- - EP 0743381 B1 [0003] - EP 0743381 B1 [0003]
- - DE 10332765 A1 [0003] DE 10332765 A1 [0003]
- - DE 4212842 [0003] - DE 4212842 [0003]
Zitierte Nicht-PatentliteraturCited non-patent literature
- - R. W. Pekala, MRS Bulletin 15(12) (1990) p.32 [0002] - RW Pekala, MRS Bulletin 15 (12) (1990) p.32 [0002]
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE200710002594 DE102007002594B4 (en) | 2007-01-12 | 2007-01-12 | Shaped body of highly porous carbon-containing airgel and process for their preparation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710002594 DE102007002594B4 (en) | 2007-01-12 | 2007-01-12 | Shaped body of highly porous carbon-containing airgel and process for their preparation |
Publications (2)
Publication Number | Publication Date |
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DE102007002594A1 true DE102007002594A1 (en) | 2008-07-17 |
DE102007002594B4 DE102007002594B4 (en) | 2012-08-30 |
Family
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DE200710002594 Expired - Fee Related DE102007002594B4 (en) | 2007-01-12 | 2007-01-12 | Shaped body of highly porous carbon-containing airgel and process for their preparation |
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DE (1) | DE102007002594B4 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010033379A1 (en) | 2010-08-04 | 2012-02-09 | Bayerisches Zentrum für Angewandte Energieforschung e.V. | Aerogel molding, useful as thermal insulation, semi-finished substrate, casting mold, damping element, filter or catalyst support, comprises pores, molding as an organic monolith, pyrolyzed monolith and the molded body |
DE102010036104A1 (en) * | 2010-09-01 | 2012-03-01 | Mlt Gmbh | Heating element for a vulcanizing press with nanoporous insulating layer |
DE102017203160A1 (en) | 2017-02-27 | 2018-08-30 | Zae Bayern Bay. Zentrum Für Angewandte Energieforschung E.V. | Method and device for cutting strip or plate-shaped felt elements |
DE102008037710B4 (en) * | 2008-08-14 | 2019-09-19 | Bayerisches Zentrum für Angewandte Energieforschung e.V. | Carbon-containing self-supporting dimensionally stable shaped body with high specific IR extinction for high-temperature applications, process for their preparation and use thereof |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2331213C3 (en) | 1972-06-19 | 1976-05-13 | Nippon Kynol Inc., Osaka (Japan) | 2/24/73 Japan 22478-73 Phenolic Resin Threads and Method for Improving the Heat Resistance of Phenolic Resin Threads |
DE4212842A1 (en) | 1992-04-16 | 1993-10-21 | Gruenzweig & Hartmann | Mineral fibre needle-felt - has surface layer of heat-resistant inorganic materials |
DE19938822A1 (en) * | 1999-08-19 | 2001-02-22 | Zae Bayern | Production of a lithium intercalation electrode used in batteries, PEM fuel cells and super capacitors comprises depositing a carbon layer on the surface of a skeleton material by introducing a carbon-containing gas into the material |
DE10126865A1 (en) * | 2001-06-01 | 2002-12-12 | Neue Materialien Wuerzburg Gmb | Porous carbon element for use in thermal insulation, anti-adhesive or anti-reflection coatings or as electrically-conductive material has a ceramic-like oxidation-protection coating |
EP0743381B1 (en) | 1995-05-16 | 2003-07-02 | Sgl Carbon Ag | Process for thermal stabilising of multi-layered products composed of polyacrylnitril fibres |
DE10332765A1 (en) | 2003-07-17 | 2005-02-17 | Leewood Elastomer Gmbh | Compound material with at least one incombustible cover layer comprises a foam layer of a substantially incombustible material emitting no toxic gases in cases of a fire |
DE102004060261A1 (en) * | 2004-12-15 | 2006-07-06 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Aerogel molded article comprises organic material coated (e.g. sealing silicone coated) surface on the molded article |
-
2007
- 2007-01-12 DE DE200710002594 patent/DE102007002594B4/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2331213C3 (en) | 1972-06-19 | 1976-05-13 | Nippon Kynol Inc., Osaka (Japan) | 2/24/73 Japan 22478-73 Phenolic Resin Threads and Method for Improving the Heat Resistance of Phenolic Resin Threads |
DE4212842A1 (en) | 1992-04-16 | 1993-10-21 | Gruenzweig & Hartmann | Mineral fibre needle-felt - has surface layer of heat-resistant inorganic materials |
EP0743381B1 (en) | 1995-05-16 | 2003-07-02 | Sgl Carbon Ag | Process for thermal stabilising of multi-layered products composed of polyacrylnitril fibres |
DE19938822A1 (en) * | 1999-08-19 | 2001-02-22 | Zae Bayern | Production of a lithium intercalation electrode used in batteries, PEM fuel cells and super capacitors comprises depositing a carbon layer on the surface of a skeleton material by introducing a carbon-containing gas into the material |
DE10126865A1 (en) * | 2001-06-01 | 2002-12-12 | Neue Materialien Wuerzburg Gmb | Porous carbon element for use in thermal insulation, anti-adhesive or anti-reflection coatings or as electrically-conductive material has a ceramic-like oxidation-protection coating |
DE10332765A1 (en) | 2003-07-17 | 2005-02-17 | Leewood Elastomer Gmbh | Compound material with at least one incombustible cover layer comprises a foam layer of a substantially incombustible material emitting no toxic gases in cases of a fire |
DE102004060261A1 (en) * | 2004-12-15 | 2006-07-06 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Aerogel molded article comprises organic material coated (e.g. sealing silicone coated) surface on the molded article |
Non-Patent Citations (1)
Title |
---|
R. W. Pekala, MRS Bulletin 15(12) (1990) p.32 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008037710B4 (en) * | 2008-08-14 | 2019-09-19 | Bayerisches Zentrum für Angewandte Energieforschung e.V. | Carbon-containing self-supporting dimensionally stable shaped body with high specific IR extinction for high-temperature applications, process for their preparation and use thereof |
DE102010033379A1 (en) | 2010-08-04 | 2012-02-09 | Bayerisches Zentrum für Angewandte Energieforschung e.V. | Aerogel molding, useful as thermal insulation, semi-finished substrate, casting mold, damping element, filter or catalyst support, comprises pores, molding as an organic monolith, pyrolyzed monolith and the molded body |
DE102010033379B4 (en) | 2010-08-04 | 2020-06-10 | Bayerisches Zentrum für Angewandte Energieforschung e.V. | Mechanically stable, nanoporous moldings, processes for their production and their use |
DE102010036104A1 (en) * | 2010-09-01 | 2012-03-01 | Mlt Gmbh | Heating element for a vulcanizing press with nanoporous insulating layer |
EP2425962A1 (en) * | 2010-09-01 | 2012-03-07 | MLT GmbH | Heating element for a vulcanising press with nanoporous isolating layer |
DE102010036104B4 (en) * | 2010-09-01 | 2017-11-23 | Mlt Gmbh | Heating element for a vulcanizing press with nanoporous insulating layer |
DE102017203160A1 (en) | 2017-02-27 | 2018-08-30 | Zae Bayern Bay. Zentrum Für Angewandte Energieforschung E.V. | Method and device for cutting strip or plate-shaped felt elements |
DE102017203160B4 (en) * | 2017-02-27 | 2020-03-19 | Zae Bayern Bay. Zentrum Für Angewandte Energieforschung E.V. | Device for cutting strip or plate-shaped felt elements |
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Publication number | Publication date |
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DE102007002594B4 (en) | 2012-08-30 |
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