Surface modification of as-synthesized lamellar mesostructured silica obtained by liquid crystal templating

Abstract

We report a study of lamellar silica phase silylation, starting from as-synthesized silica, without the usual heat treatment step. Characterizations of the modified silica include X-ray diffraction, thermal analysis, electron microscopy and solid state NMR. Special attention is given to the possibility of keeping the lamellar organisation along with the elimination of the organic template.

Surface modification and porosimetry of vertically aligned hexagonal mesoporous silica films

“…As the Si(OH)(OSi) 3 sites are reacted with the graing agent the Q3 signal in the graed samples should decrease relative to Q4 and to the Q3 signal in the ungraed membrane. 61 The CP spectra (Fig. 5) are not quantitative so direct acquisition spectra were also collected (Fig.…”

Synthesis of Hybrid Lamellar Silica by Liquid Crystal Templating and Silanation

“…Among the group of lamellar fillers, which includes the well-studied natural clays, synthetic lamellar silicas prepared by liquid crystal templating are very promising materials. Among our laboratory, several studies have been therefore focused on the preparation and characterization of these lamellar particles [4,5]. As it will be shown in this article, combining silanization and surfactant extraction can produce various hybrids from whom the surface and inter-lamellar space can be easily tuned in order to insure better compatibility of these fillers towards any solvents or polymers.…”