Glycidoxypropyltrimethoxysilane modified colloidal silica coatings

Book · Tue Dec 31 04:00:00 EST 1996

OSTI ID:427699

Chu, L; Daniels, M W; Francis, L F ^[1]

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1. Univ. of Minnesota, Minneapolis, MN (United States)

Coatings were prepared from a suspension of colloidal silica particles containing glycidoxypropyltrimethoxysilane (GPS) and a polyamine curing agent. GPS was first added to an aqueous silica suspension which contained ethanol (30 wt%) to enhance mixing. The addition of GPS to a basic silica suspension favored condensation among the silane monomers and oligomers, resulting in precipitation. By contrast, acidic conditions resulted in slower condensation which allowed adsorption on the silane on silica, as followed by ATR-FTIR. After GPS addition and aging, the pH of the suspension was increased, a polyamine was added, and coatings were prepared on polyester web. Coatings with GPS modification were denser, adhered better to the polymer substrate, and could be made thicker than unmodified silica coatings.

• Sponsoring Organization: National Science Foundation, Washington, DC (United States)
• OSTI ID: 427699
• Report Number(s): CONF-960401--; ISBN 1-55899-338-X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
CONCENTRATION RATIO
DEHYDROCYCLIZATION
EPOXIDES
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
HYDROLYSIS
INFRARED SPECTRA
MICROSTRUCTURE
OPTICAL MICROSCOPY
PARTICULATES
PH VALUE
PHTHALATES
POLYETHYLENES
POLYMERS
SCANNING ELECTRON MICROSCOPY
SILANES
SILICA
SUBSTRATES
SURFACE COATING