Reactivity of organosilane reagents on microparticulate silica
Journal Article
·
· Anal. Chem.; (United States)
Competitive surface reactions between binary organosilane mixtures and microparticulate silica were undertaken to determine if the surface composition of chemically modified silicas could be controlled by varying the molar composition and addition rate of the reagent mixture. X-ray fluorescence (XRF) spectroscopy and elemental carbon analysis permitted differences in silane reactivity to be evaluated as a function of alkyl chain length for a series of haloalkylsilanes. The rate of addition and the presence of a catalysts were found to control the surface composition of silicas derivatized from binary silane mixtures. Comparison of X-ray photoelectron spectroscopy data with XRF results was used to determine the spatial distribution of the immobilized silanes in order to evaluate the extent to which diffusion controls the relative reactivity of organosilane reagents. 17 references, 6 tables.
- Research Organization:
- Univ. of Utah, Salt Lake City
- OSTI ID:
- 6013181
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:4; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
CATALYSIS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
DERIVATIZATION
DIFFUSION
EXPERIMENTAL DATA
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
MINERALS
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
QUANTITY RATIO
SILANES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SURFACE PROPERTIES
SURFACES
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
CATALYSIS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
DERIVATIZATION
DIFFUSION
EXPERIMENTAL DATA
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
MINERALS
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
QUANTITY RATIO
SILANES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SURFACE PROPERTIES
SURFACES
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS