Mueller, Rainer and Knapp, Martin and Heckmann, Klaus and von Ruthendorf, Monika and Boden, Gottfried (2004) Protecting nanoscaled non-oxidic particles from oxygen uptake by coating with nitrogen-containing surfactants. LANGMUIR, 20 (7). pp. 2598-2606. ISSN 0743-7463
Full text not available from this repository. (Request a copy)Abstract
To suppress the reactivity of nanoscaled non-oxidic powders of titanium nitride (TiN) and silicon carbonitride (SiCN) against hydrolysis and oxidation, chemical surface modification with nitrogen-containing surfactants was investigated. Among these surfactants, long-chain primary amines, ethylenediamines, guanidines, nitriles, isocyanates, and succinimides were examined. Thermogravimetry, elemental analysis, and behavior against the water-vapor adsorption of the modified particles were used as methods to estimate the protective capacity of the organic coating material. The best results were obtained by using the long-chain amines and octadecylisocyanate, which were indicated by a significant shift of the powder oxidation toward the higher temperatures and an increase of the particle hydrophobicity. A long-chain succinimide was found to be the most effective in dispersing nanoscaled TiN in organic media. Preparation of a stable aqueous dispersion without significant changes in the elemental composition of the powder was achieved by the application of an ionic surfactant to the surface-modified particles.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ALUMINUM NITRIDE POWDER; SILICON-NITRIDE; DISPERSION; REACTIVITY; MEDIA; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Rainer Müller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Jul 2021 08:15 |
| Last Modified: | 26 Jul 2021 08:15 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37855 |
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