Mesostructured fluorocarbon-silica hybrid materials with a low dielectric constant

CARLOS RODRÍGUEZ-ABREU; PABLO M. BOTTA; JOSÉ RIVAS; KENJI ARAMAKI; MANUEL A. LÓPEZ QUINTELA

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

Año: 2007 vol. 298 p. 284 - 286

0927-7757

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 (p6mm) 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.