Cross-condensation kinetics of organically modified silica sols

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Description

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.

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6 p.

Creation Information

Prabakar, S. & Assink, R.A. June 1, 1996.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this article can be viewed below.

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  • Prabakar, S. Advanced Materials Lab., Albuquerque, NM (United States)
  • Assink, R.A. Sandia National Labs., Albuquerque, NM (United States)

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

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.

Physical Description

6 p.

Notes

OSTI as DE96010990

Source

  • Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 8-12 Apr 1996

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  • Other: DE96010990
  • Report No.: SAND--96-1230C
  • Report No.: CONF-960401--31
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 244537
  • Archival Resource Key: ark:/67531/metadc669404

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • June 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 14, 2016, 3:29 p.m.

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Prabakar, S. & Assink, R.A. Cross-condensation kinetics of organically modified silica sols, article, June 1, 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc669404/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.