Cross-condensation kinetics of organically modified silica sols
Conference
·
OSTI ID:244537
- Advanced Materials Lab., Albuquerque, NM (United States)
- Sandia National Labs., Albuquerque, NM (United States)
The hydrolysis and self- and cross-condensation kinetics of the hybrid sol tetraethoxysilane and ethyltriethoxysilane were investigated by high resolution {sup 29}Si NMR spectroscopy. A kinetic model in which hydrolysis is reversible and condensation is irreversible was developed. The authors found excellent agreement between the product distributions measured by {sup 29}Si NMR spectroscopy and calculated by the model. The cross-condensation rates for each of the sols were intermediate to the condensation rates of the individual components. Calculations show that for these sols, the concentration of cross-condensed species is a weak function of the relative rates of self-condensation.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 244537
- Report Number(s):
- SAND--96-1230C; CONF-960401--31; ON: DE96010990
- Country of Publication:
- United States
- Language:
- English
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