Aerogels are porous and have air trapped inside the solid framework instead of a liquid.
The diameter of the pores range of 1 to 100 nanometers and are usually < 20 nm.
Gel = solid framework + liquid
Aerogel = solid framework + air
How do you remove the liquid without collapsing the solid framework? Supercritical CO2!
Visit the Applied Separations website to find out more about aerogel drying with supercritical CO2.
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