Formation of silicate-surfactant mesophases
- Univ. of California, Santa Barbara, CA (United States)
This report describes meophase materials useful to petroleum industry. Cooperative interactions among aqueous silicate and surfactant ions can lead to a variety of novel liquid crystalline materials that would not be found in the binary aqueous inorganic or surfactant solutions alone. Using {sup 2}H and {sup 29}Si NMR and X-ray diffraction methods, we have correlated molecular structure and motions at organic-aqueous interfaces with long range aggregate organization to establish a general mechanism for the controlled assembly of silicate-surfactant liquid crystalline mesophases. Subsequent condensation of interfacial silicate species can be induced separately, uncoupling thermodynamic mesophase self-assembly from the kinetics of silica polymerization. Such insights allow more effective control of the composition and morphology of mesophase materials, including the MCM-family of mesoporous solids. These results have direct analogies to the chemistry of other inorganic-organic composite materials, where cooperative interactions across an interface provide key structure-directing functions for the formation of intricate inorganic networks.
- OSTI ID:
- 126744
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
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