Can silica be used in food？

Created on 2024.11.28

Yes, silica can be used in food.

Silica can be used in food, but there are limits. Silicon dioxide is used in the food industry as an anti-caking agent, defoamer, thickener, filter aid, and clarifying agent. China's "Health Standard for the Use of Food Additives" (GB2760-2014) stipulates: it can be used in egg powder, powdered sugar, milk powder, cocoa powder, cocoa butter, plant powder, instant coffee, soup powder, etc., with a maximum usage of 15g/kg; for powder essence, the maximum usage is 80g/kg; for solid drinks, the maximum usage is 0.2g/kg; for grains, the maximum usage is 1.2g/kg.

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Silicon dioxide is one of the anticoagulants. Anti-caking agents, also known as anti-caking agents, are substances used to prevent particles or powdered food from aggregating boundary blocks and keep them loose or free-flowing. Its particles are fine, loose and porous, strong adsorption force, and easy to adsorb resulting in the formation of dispersed moisture, grease, etc., so that food can maintain powder or particle state.

Silicon dioxide is used as an anti-caking agent, mainly used in egg powder, milk powder, cocoa powder, cocoa butter, sugar powder, plant fat powder, instant coffee, powdered soup, and powder flavor. Due to temperature changes, increased humidity, or pressure between packages, food powder tends to stick together and form lumps, affecting product quality and shelf life. The use of silica in food can prevent caking by separating the particles of food powder in the packaging, maintaining the powder in a free-flowing state, and preventing moisture absorption and clumping during storage.

Silicon dioxide Nanopowder

Product overview

The basic structure of nano-silica is SiO2, which is amorphous white powder, and the microstructure can be spherical, flocculent or reticulated quasi-particle structure. The presence of unsaturated residual bonds and hydroxyl groups in different bonded states on its surface makes it excellent in a variety of applications. There are three main methods for the preparation of nano silica, including: precipitation method: through the high temperature hydrolysis of silicon halide in the hydrogen and oxygen flame to generate nano silica. Sol-gel method: using silanol as the precursor, hydrolysis and condensation in solvent to form sol and gel, and then drying and calcination to get nano silica. Vapor phase method: The silica halide is hydrolyzed at high temperature in an oxyhydrogen flame to produce nano silica.

Technical parameter

白色粉末

Purity: 99%

Particle size: 20 nm

Specific surface area: 145-160 m2/g

The surface of this product has many hydroxyl groups and good water absorption.

Product characteristics

High specific surface area: 由于其小颗粒尺寸，纳米二氧化硅具有非常高的比表面积，这为其提供了更多的活性位点。

反射率：它可以有效地反射紫外线、可见光和红外线，因此在许多需要紫外线保护的应用中非常有用。

Biocompatibility: Nano-silica has good biocompatibility and can be used in the biomedical field.

Product application

Electronic packaging materials: Because of its high dielectric, high heat resistance, high filling capacity and other characteristics, it is widely used in the electronic and electrical industry.

Rubber modification: improve the tensile strength, tear resistance and wear resistance of rubber products, and significantly improve the performance of rubber.

Coatings and adhesives: 用于改善涂料和粘合剂的流变和触变性能，增强其防沉降和增稠效果。

Optoelectronics: It is widely used in optical sensors, solar cells, display technology, etc., such as improving the photoelectric conversion efficiency of dye-sensitized solar cells.

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