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Novel sol–gel derived cellular foam: reaction of an organotrialkoxysilane with sodium hypophosphite

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Abstract

(3-Triethoxysilylpropyl)succinic anhydride (TESP-SA) is an organo-functional silicon compound that can be converted into a polysilsesquioxane when it is hydrolyzed and subsequently subjected to a condensation reaction at elevated temperatures (>160 °C). If this process is performed without sodium hypophosphite (SHP), a hard solid material is obtained. In contrast, the condensation reaction of TESP-SA in conjunction with SHP results in the formation of a foamed, brittle material with closed macro cells. The foam was characterized by means of various analytical methods (FT-IR, 29Si MAS NMR, XRD, TG-MS, SEM).

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Notes

  1. The peak is labeled with the X, Mn, Dn, Tn, and Qn notation. X, M, D, T, Q refer to SiC4−x O x units with x = 0, 1, 2, 3 or 4, n is the number of bridging O atoms surrounding Si.

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Authors and Affiliations

  1. Research Institute for Textile Chemistry and Textile Physics, University of Innsbruck, Höchsterstrasse 73, 6850, Dornbirn, Austria

    Christian Schramm & Beate Rinderer

  2. Macromolecular Chemistry Division, Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163/MC, 1060, Vienna, Austria

    Wolfgang H. Binder

  3. Institute of Mineralogy and Petrography, University of Innsbruck, Innrain 52, 6020, Innsbruck, Austria

    Richard Tessadri

  4. Research Centre Microtechnique, University of Applied Science, Achstrasse 1, 6850, Dornbirn, Austria

    Heinz Duelli

Authors
  1. Christian Schramm
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  2. Beate Rinderer
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  3. Wolfgang H. Binder
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  4. Richard Tessadri
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  5. Heinz Duelli
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Correspondence to Christian Schramm.

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Schramm, C., Rinderer, B., Binder, W.H. et al. Novel sol–gel derived cellular foam: reaction of an organotrialkoxysilane with sodium hypophosphite. J Sol-Gel Sci Technol 45, 83–88 (2008). https://doi.org/10.1007/s10971-007-1627-6

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  • DOI: https://doi.org/10.1007/s10971-007-1627-6

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