Preparation and electro-optical characterization of aminosilane-modified silica gel dispersed liquid crystal films by the sol–gel process

2013 ◽  
Vol 91 ◽  
pp. 20-22 ◽  
Author(s):  
Jiayu Guo ◽  
Mei Tang ◽  
Haifeng Ling ◽  
Li Yuan
Keyword(s):  
Liquid Crystal ◽  
Silica Gel ◽  
Sol Gel ◽  
Optical Characterization ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Liquid Crystal Films ◽  
Sol Gel Process ◽  
Crystal Films

Synthesis and Characterization of Cellular SiO2 Materials by Foaming Sol Gels

1990 ◽  
Vol 207 ◽  
Author(s):  
Josephine Covino ◽  
Allen P. Gehris
Keyword(s):  
Sol Gel ◽  
Optical Characterization ◽  
Viscosity Change ◽  
Density Measurements ◽  
X Ray ◽  
X Ray Crystallography ◽  
Foaming Process ◽  
Sol Gel Process ◽  
Porous Oxides

AbstractA variety of cellular SiO2 materials have been synthesized using a foaming sol-gel process and their properties have been characterized. The process uses the rapid viscosity change during gelation to stabilize the structure of a foamed silica sol. It was found that the properties of these cellular materials are determined by method used. For example, the porosity and strength of these porous oxides depend on method of agitation and addition of Freon during the foaming process.Density measurements, viscosity measurements as a function of pH, optical characterization, x-ray crystallography, ultimate compressive strength, dielectric constant measurements and thermal diffusivity were used to characterize these porous SiO2 materials. This paper will discuss the synthetic processes used to develop the porous silicas and properties of these materials.

Sign in / Sign up

Export Citation Format

Share Document