Please use this identifier to cite or link to this item: doi:10.22028/D291-24700
Title: Synthesis and properties of perfluoroalkyl groups containing double four-ring spherosilicate (siloxysilsesquioxane) precursors
Author(s): Hoebbel, Dagobert
Weber, Christine
Schmidt, Helmut K.
Krüger, Ralph-Peter
Language: English
Year of Publication: 2002
OPUS Source: Journal of sol gel science and technology. - 24. 2002, 2, S. 121-129
SWD key words: Hydrophobie
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: Organically modified cage-like double four-ring spherosilicates have received considerable interest in the construction of nanosized hybrid materials, as well as building units for structural well-defined polymers. This group is extended by perfluoroalkyl ligands containing spherosilicates, synthesized by addition reaction of the octahydridodimethlysiloxyoctasilsesquioxane [H(CH3)2Si]8Si8O20 and heptadecafluorodecyl methacrylate. The resultant liquid spherosilicate substituted with eight terminal perfluoroalkyl groups was characterized by 29 and 13C NMR spectroscopies and MALDI Time-of-Flight mass spectrometry. Partial substitution of perfluoroalkyl ligands by trimethoxysilyl containing groups provides condensable precursors for the synthesis of hydrophobic and oleophobic materials via the sol-gel process. This new spherosilicate, carrying on average four perfluoroalkyl groups and four trimethoxysilyl groups shows better hydrophobic and oleophobic properties compared with commonly used perfluoroalkyltrialkoxysilanes under identical concentration of perfluoroalkyl chains. In addition a comprehensive literature survey is given on structural well characterized, organically modified cage-like double four-ring spherosilicates.
Link to this record: urn:nbn:de:bsz:291-scidok-30243
Date of registration: 11-Nov-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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