Consolidation of Inorganic Precipitated Silica Gel

The toxicity of precipitated silica.

Experimental data of inorganic gel based smart window using silica sol–gel process

In this article experimental data are presented for inorganic gel based smart window fabricated using silica sol-gel process. Parallel beam transmittances were measured as functions of voltages for samples fabricated with different concentrations of nitric acid. Spectroscopic transmittance data at different driving voltages for samples fabricated with different LC concentrations are shown. Tran...

Infrared and thermogravimetric study of high pressure consolidation in alkoxide silica gel powders

High density, transparent, crack-free and hard compacts of silica gel were produced by compaction under nearly hydrostatic environment at 4.5 GPa, at room temperature. The starting material was used three days after synthesis by hydrolysis of alkoxides without additional treatment. Fourier transform infrared spectroscopy (FTIR), using the KBr technique and a high vacuum cell at temperatures up ...

Aging effects of precipitated silica in poly(dimethylsiloxane)

e report the transformation from gels to viscous fluids within a time period of 101–103 h in ixtures of precipitated silica in silicone oil. Scaling behavior in elastic and viscous moduli versus requency, similar to that reported by Trappe and Weitz Phys. Rev. Lett. 85, 449–452 2000 , has een observed for suspensions of different ages, silica volume fractions, and silicone oil molecular eights;...

Hybrid organic-inorganic silica gel carriers with controlled drug-delivery properties.

Pure and modified silica materials were synthesised by a sol-gel process and used as carrier for the controlled release of ibuprofen, selected as model drug. A one-step synthesis was optimised for the preparation of various silica-drug composites by using tetraethoxysilane and 3-aminopropyltriethoxysilane as precursors at different molar ratios. The presence of aminopropyl groups on the silica ...