EVONIK OFFERS SURFACE FUNCTIONALIZED COLLOIDAL SILICA PARTICLES

Evonik's unmodified IDISIL® Colloidal Silica is anionic in nature and can be used in a variety of water based applications such as chemical mechanical polishing and coatings. 

For non-aqueous applications, surface modification of the IDISIL® Colloidal Silica can aid in the silica's compatibility and enhance a variety of physical properties.  As the world leader in specialty silane production, Evonik has a large library of organosilanes that can be used to tailor particle surfaces to meet your needs.  Silanol groups on the surface of IDISIL® Colloidal Silica particles can react with organosilanes to form a chemical bond, anchoring the desired functionality onto the silica's surface.  Evonik's unique position in silane and silica technology allows us to readily work with customers on their unique problems. 

Once functionalized with an Evonik organosilane, the IDISIL® Colloidal Silica becomes highly compatible with organic matrices. When the organosilane modified IDISIL® Colloidal Silica is used in composites, the particles play an important role in preventing phase separation of the resin system and enhancing mechanical strength. For example, epoxy modified IDISIL® Colloidal Silica can be used as a filler to reinforce mechanical strength as well as increase thermal stability. 

When the surface of the IDISIL® Colloidal Silica is functionalized with an alkyl, phenyl or/and vinyl groups by using Evonik organosilanes, it makes the IDISIL® Colloidal Silica particles hydrophobic. When the functionalized IDISIL® Colloidal Silica is used in a superhydrophobic coating the particles enhance the repulsion of water. 

Optical coatings with improved thermal and mechanical properties can be made with (meth)acrylate surface modified IDISIL® Colloidal Silica. These particles can be evenly dispersed to the coating resin matrix by in situ polymerization reactions. 

Amine functionalized IDISIL® Colloidal Silica has found use in membrane applications as a selective metal binder. The amine functionality on the surface of the IDISIL® Colloidal Silica also allows it to be used as a building block for attaching complex dyes or biomolecules for various biomedical applications. Also, these particles can act as catalyst support.

Besides the mentioned, there are many other applications for which Evonik’s IDISIL® Colloidal Silica can help to improve performance. With the toolkit we have, we are curious to explore those opportunities with you. Just contact us and let’s start exploring together!