Precipitated silica has multiple functions in modified materials, which are mainly due to its unique physical and chemical properties and structural characteristics. The following is a detailed description of the multifunctionality of precipitated silica in modified materials:

1. Reinforcement
Enhance material strength: Due to its high specific surface area and porosity, precipitated silica can form a strong physical cross-linking network in rubber, plastic and other substrates, significantly improving the tensile strength, tear strength and hardness of the material.
Improve wear resistance: In rubber products such as tires and rubber rollers, silica can significantly improve the wear resistance of the product and extend its service life.

2. Viscosity
Improve processing performance: The good dispersibility of silica in rubber helps to improve the fluidity of the rubber, reduce processing viscosity and improve processing efficiency.
Enhance adhesion: In composite materials, silica can enhance the adhesion between the substrate and the additive and improve the overall performance of the material.

3. Improve physical properties
Improve thermal stability: Silica has good high temperature resistance and can maintain the stability of the material under high temperature environment.
Reduce compression set: In rubber products, white carbon black can reduce the compression set of materials and improve the dimensional stability of products.

4. Electrical insulation
Excellent electrical insulation performance: White carbon black has high electrical insulation and is suitable for fields such as electronics and electrical that require high insulation performance.

5. Other functions
Environmental protection: White carbon black is non-toxic, odorless, non-flammable, and meets environmental protection requirements.
Multi-field application: In addition to the rubber and plastics industries, white carbon black is also widely used in papermaking, coatings, inks, cosmetics and other fields.

6. Improved multifunctionality after surface modification
Improve dispersibility: Through surface modification treatment, the hydroxyl content on the surface of white carbon black can be reduced, its agglomeration phenomenon in the substrate can be reduced, and dispersibility can be improved.
Enhanced compatibility: The compatibility of the modified white carbon black with the substrate is improved, and it can better play a reinforcing and viscosity-increasing role.

Improved performance: Surface modification can also adjust the performance of white carbon black according to specific needs, such as improving anti-slip properties and reducing rolling resistance, so as to meet the application needs of different fields.
In summary, precipitated silica has many functions in modified materials, such as significant reinforcement, viscosity enhancement, physical property improvement, electrical insulation, etc., and its performance and application range can be further improved after surface modification. These functions make silica widely used in rubber, plastic, papermaking, coatings and other industries.