Mesostructured fluorocarbon–silica hybrid materials with a low dielectric constant

The properties of a fluorocarbon–silica hybrid prepared by sol–gel hydrolytic polycondensation using a non-ionic fluorocarbon surfactant as a structure-directing agent are studied by small angle X-ray scattering, scanning electron microscopy, 29Si MAS-NMR, thermogravimetric analysis and dielectric r...

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Bibliographic Details
Published in:Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2007-05, Vol.298 (3), p.284-286
Main Authors: Rodríguez-Abreu, Carlos, Botta, Pablo M., Rivas, José, Aramaki, Kenji, Quintela, Manuel Arturo López
Format: Article
Language:English
Subjects:
Chemistry
Dielectric behavior
Exact sciences and technology
Fluorocarbon surfactant
General and physical chemistry
Mesostructured silica
Small angle X-ray scattering
Thermogravimetric analysis
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Summary:The properties of a fluorocarbon–silica hybrid prepared by sol–gel hydrolytic polycondensation using a non-ionic fluorocarbon surfactant as a structure-directing agent are studied by small angle X-ray scattering, scanning electron microscopy, 29Si MAS-NMR, thermogravimetric analysis and dielectric relaxation. The obtained hybrid material consists mainly of micron-sized spherical particles with an internal two-dimensional hexagonal ( p6 mm) nanostructure. The material is thermally stable (with a high proportion of fully cross-linked silica) and shows a very low dielectric constant (about 2.15), which can be interesting from the point of view of applications.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2006.11.019