Formation and characterization of monodisperse, spherical organo-silica powders from organo-alkoxysilane-water system

Cited 70 time in webofscience Cited 0 time in scopus
  • Hit : 255
  • Download : 16
Monodisperse, spherical organo-silica powders were synthesized from an immiscible mixture of an aqueous NH4OH solution and organo-alkoxysilanes, such as phenyl-trimethoxysilane (PTMS), methyltrimethoxysilane (MTMS), and methyltriethoxysilane (MTES), When the organo-alkoxysilanes were added to the aqueous NH4OH solution with stirring, organo-alkoxysilane/water macroemulsions were formed because of the immiscibility of the aqueous NH4OH solution and the organo-alkoxysilane, In the emulsion, organo-alkoxysilane droplets dissolved into the water phase through the droplet-water interface, and the organo-silica powder was formed by the hydrolysis and condensation of the organo-alkoxysilane. The powders were obtained reproducibly under broad concentrations of organo-alkoxysilanes; 0.3-1.5 mol/L for PTMS, 0.3-0.6 mol/L for MTMS, and MTES, with concentrations of ammonia between 0.0625 and 2.0 mol/L, According to the analysis of the solid-state MAS Si-29 NMR and the C-13 NMR analysis, the organo-silica powder did not contain any residual alkoxy groups, only carbon sources from nonhydrolyzable R groups: phenyl groups in PTMS, and methyl groups in MTMS and MTES.
Publisher
AMER CERAMIC SOC
Issue Date
1998-05
Language
English
Article Type
Article
Keywords

SOL-GEL METHOD; CARBIDE; HYDROLYSIS; PARTICLES; ALKOXIDES; SPHERES

Citation

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.81, no.5, pp.1184 - 1188

ISSN
0002-7820
URI
http://hdl.handle.net/10203/20248
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 70 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0