Basic Characteristics of Precipitated Silica
Precipitated silica (silicon dioxide) is a porous substance with a chemical composition represented as SiO₂·nH₂O, where nH₂O exists in the form of surface hydroxyl groups. It possesses the following characteristics:

High temperature resistance, non-flammable, odorless, and tasteless
Excellent electrical insulation properties
Soluble in caustic alkalis and hydrofluoric acid, insoluble in water, solvents, and acids (except hydrofluoric acid)
Microstructure with a large specific surface area and porous structure
These characteristics make precipitated silica an ideal choice for feed additives, especially in improving powder flow and adsorption capacity.

Mechanisms for Improving Powder Flow
Precipitated silica improves the powder flow of feed additives through several mechanisms:

Particle size optimization: Controlling particle fineness and dispersion through crushing processes reduces inter-particle adhesion and improves flowability.

Surface modification technology: Chemical modification using surface treatment agents (such as silane coupling agents) reduces surface energy and minimizes particle aggregation.

Flow aid addition: Adding appropriate amounts of flow aids such as magnesium stearate can significantly reduce inter-particle friction.

Dispersant application: Adding dispersants such as polyethylene glycol can break down particle agglomerates, resulting in a more uniform powder dispersion.

Particle morphology control: Patented technology can produce granular feed-grade precipitated silica, which has better flowability compared to powdered forms. Principles of Enhanced Adsorption Capacity
The porous structure of precipitated silica gives it excellent adsorption capabilities. The main mechanisms include:

Physical Adsorption Mechanism:
Pore structure adsorbs water molecules through van der Waals forces (hydrogen bonding).
Large specific surface area (up to several thousand m²/g) provides a large number of adsorption sites.
Uniform pore size distribution allows for selective adsorption of specific molecules.
Chemical Adsorption Characteristics:

Surface hydroxyl groups can form hydrogen bonds with polar substances.
Modified surfaces can generate specific chemical adsorption sites.
Application Advantages:

Can adsorb moisture and mycotoxins in feed.
As a carrier, it can extend the sustained release time of active ingredients in additives.
Can adsorb pathogenic bacteria and toxins in the animal's intestinal tract.
Practical Application Cases
Feed Carrier Application:

Quecheng Co., Ltd.'s C-series products have obtained the Ministry of Agriculture's feed additive production license.
Divided into three categories: carrier type, flow aid type, and anti-caking type.
Certified by FAMI-QS and the US FDA.
Functional Additives:

Feed additives compounded with lotus seed heart, etc., can promote pig growth.
Has the effect of preventing feed spoilage.
Can improve the stability and shelf life of feed.
Industrial Application Reference:

Sanming Zhengyuan Chemical's precipitated silica products have shown significant export growth.
Widely used in thickeners, friction agents, feed additives, and other fields.
Conclusion
As a feed additive, precipitated silica effectively improves powder flowability and adsorption capacity through its unique porous structure and surface characteristics. In terms of flowability, it can be significantly improved through process optimization and additive combinations; in terms of adsorption capacity, its high specific surface area and pore structure provide excellent physical adsorption performance. Practical applications show that precipitated silica can not only serve as a high-quality carrier but also improve feed quality by adsorbing harmful substances, making it an important functional additive in the feed industry. In the future, with the advancement of surface modification technology, its performance and application range will be further expanded.