Cooperative Formation of Inorganic-Organic Interfaces in the Synthesis of Silicate Mesostructures
Abstract
A model is presented to explain the formation and morphologies of surfactant-silicate mesostructures. Three processes are identified: multidentate binding of silicate oligomers to the cationic surfactant; preferential silicate polymerization in the interface region; and charge density matching between the surfactant and the silicate. The model explains present experimental data, including the transformation between lamellar and hexagonal mesophases, and provides a guide for predicting conditions favoring the formation of lamellar, hexagonal or cubic mesostructures. The model Q230 proposed by Mariani et al. (21) satisfactorily fits the X-ray data collected on the cubic mesostructure material. This model suggests that the silicate polymer forms an unique infinite silicate sheet sitting on the gyroid minimal surface and separating the surfactant molecules into two disconnected volumes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 03, 1993
- Accession Number
- ADA271196
Entities
People
- A. Monnier
- D. Kumar
- D. Margolese
- F. Schuth
- Qingze Huo
Organizations
- University of California, Santa Barbara