Aerosil
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Aerosil is a fumed silica product developed in 1942 by Degussa AG in Germany.
[edit] Properties
Aerosil is pure silicon dioxide, made from vaporized silicon tetrachloride, oxidized in high-temperature flame with H2 and O2. Aggregated amorphous nano-sized primary particles gives free flow to powder materials. It gives thickening effect and thixotropy by dispersing to liquid materials. Standard hydrophilic products are made of primary particles from 7 nm to 40 nm, and also these products are surface modified to hydrophobic.
[edit] Applications
- As free-flow agent: toner, food, pharmaceutics.
- As rheology controller: paint, coating, adhesives, sealant, plastics.
- Others: film, fiber, ceramics, catalyst support, glass.
