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Surface modification of silica gels with aminoorganosilanes

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Abstract
The surface modification reaction of silica gel with aminoorganosilanes proceeds in two steps. For both the reaction step and the curing step, the chemical and physical interactions of the silane molecules with the silica surface have been modelled. From ethanol leaching tests, the reaction phase interaction, in dry conditions, may be characterized as 22% proton transfer, 10% hydrogen bonding and 68% siloxane bonding. The deposition of the aminosilane molecules is governed by the specific surface area and surface hydration. For the bifunctional N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane, a two-step deposition is observed. The rate of siloxane bonding in the curing phase is limited by the number of alkoxy groups, and results in a turnover of the aminosilane molecules. A new application of aminosilane-modified silica gel is developed in converting the aminosilane layer to SiC. Thus, the liquid phase path of the chemical surface coating process, for the controlled synthesis of advanced ceramics, is set up.
Keywords
DEHYDROXYLATED SILICA, WATER, GAMMA-AMINOPROPYLTRIETHOXYSILANE, NUCLEAR-MAGNETIC-RESONANCE, SURFACE MODIFICATION, SILICA GELS, AMINOORGANOSILANES

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Citation

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Chicago
Vrancken, KC, K Possemiers, Pascal Van Der Voort, and Etienne F Vansant. 1995. “Surface Modification of Silica Gels with Aminoorganosilanes.” Colloids and Surfaces A-physicochemical and Engineering Aspects 98 (3): 235–241.
APA
Vrancken, KC, Possemiers, K., Van Der Voort, P., & Vansant, E. F. (1995). Surface modification of silica gels with aminoorganosilanes. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 98(3), 235–241.
Vancouver
1.
Vrancken K, Possemiers K, Van Der Voort P, Vansant EF. Surface modification of silica gels with aminoorganosilanes. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS. 1995;98(3):235–41.
MLA
Vrancken, KC, K Possemiers, Pascal Van Der Voort, et al. “Surface Modification of Silica Gels with Aminoorganosilanes.” COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 98.3 (1995): 235–241. Print.
@article{346040,
  abstract     = {The surface modification reaction of silica gel with aminoorganosilanes proceeds in two steps. For both the reaction step and the curing step, the chemical and physical interactions of the silane molecules with the silica surface have been modelled.
From ethanol leaching tests, the reaction phase interaction, in dry conditions, may be characterized as 22\% proton transfer, 10\% hydrogen bonding and 68\% siloxane bonding. The deposition of the aminosilane molecules is governed by the specific surface area and surface hydration. For the bifunctional N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane, a two-step deposition is observed.
The rate of siloxane bonding in the curing phase is limited by the number of alkoxy groups, and results in a turnover of the aminosilane molecules.
A new application of aminosilane-modified silica gel is developed in converting the aminosilane layer to SiC. Thus, the liquid phase path of the chemical surface coating process, for the controlled synthesis of advanced ceramics, is set up.},
  author       = {Vrancken, KC and Possemiers, K and Van Der Voort, Pascal and Vansant, Etienne F},
  issn         = {0927-7757},
  journal      = {COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS},
  keyword      = {DEHYDROXYLATED SILICA,WATER,GAMMA-AMINOPROPYLTRIETHOXYSILANE,NUCLEAR-MAGNETIC-RESONANCE,SURFACE MODIFICATION,SILICA GELS,AMINOORGANOSILANES},
  language     = {eng},
  number       = {3},
  pages        = {235--241},
  title        = {Surface modification of silica gels with aminoorganosilanes},
  url          = {http://dx.doi.org/10.1016/0927-7757(95)03119-X},
  volume       = {98},
  year         = {1995},
}

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