Colloidal Silica - A Versatile Problem Solver, Product Article

Binder Applications

LUDOX® colloidal silica forms strong ionic and hydrogen bonds with granular and fibrous material.  These bonds are thermally stable and chemically inert making them especially useful for:

• Investment Casting Slurries
• Vacuum Formed Refractories
• Specialty Coatings
• Catalysts
• Insulation Board

Surface Modification Application

The silica particles in LUDOX® adhere well to many surfaces via ionic and hydrogen bonding.  Once applied to a surface the silica particles provide an increased coefficient of friction that is useful for:

• Paper & cardboard
• Flooring
• Polishing Slurries
• Industrial and architectural coatings

Flocculant Applications

LUDOX® colloidal silica is available in grades with anionic sol charge as well as cationic sol charge.  When added to solutions  LUDOX® particles bond ionically with particles of the opposite charge and fall out of suspension.  This makes LUDOX® an excellent flocculant for:

• Paper retention and drainage
• Beverage fining (beer and wine)
• Insulation board

The characteristics of LUDOX® Colloidal Silica and it's usefulness as a binder and surface modifier are further highlighted in the short video below.
 

Today, LUDOX® colloidal silica is used in applications ranging from a high temperature binder for the production of aerospace parts to a fining agent used to produce beer and wine. LUDOX® functions in commercial applications in three major ways; as a binder, surface modifier, and flocculant.LUDOX® colloidal silica forms strong ionic and hydrogen bonds with granular and fibrous material. These bonds are thermally stable and chemically inert making them especially useful for:The silica particles in LUDOX® adhere well to many surfaces via ionic and hydrogen bonding. Once applied to a surface the silica particles provide an increased coefficient of friction that is useful for:LUDOX® colloidal silica is available in grades with anionic sol charge as well as cationic sol charge. When added to solutions LUDOX® particles bond ionically with particles of the opposite charge and fall out of suspension. This makes LUDOX® an excellent flocculant for:The characteristics of LUDOX® Colloidal Silica and it's usefulness as a binder and surface modifier are further highlighted in the short video below.

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Identification of agglomerates and aggregates in colloidal silicic acid

Silica sol, also known as colloidal silicic acid, is a stable suspension of spherical silicon dioxide (SiO2) nanoparticles in a liquid, that are hydroxylated on the surface. Colloidal silicic acid is found in almost all industrial sectors. The applications range from surface treatment in the paper industry, to use as a polishing agent in the electronics industry and use as an additive for varnishes, coatings and paints to improve weather and abrasion resistance. It is also a common additive in cosmetics and in the food industry. The mean particle size and distribution width define the field of application of the SiO2 particles. Typical sizes range from 1 nm to 100 nm.

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