Properties of Erosil
Erosil, also known as silica fume, is a white, powdery substance composed of very fine particles of silicon dioxide (SiO2). The irregular bonding of these particles increased the surface/volume ratio of this material. The physical and chemical properties of this material are as follows.
Physical characteristics
White powder appearance Density 160 to 210 kg/m3 Insoluble in water Soluble in strong acids and bases It has a melting point of 1725 degrees Celsius. It has a surface area of 50 to 600 square meters per gram. Particle size between 5 and 50 nm
Chemical properties
- It is chemically inert and non-toxic.
- It has weak acidity.
- Due to its large surface area, it is a strong absorbent for liquids, gases and solids.
- Prevents particles from settling in liquids.
- It is not flammable at normal temperatures.
What is Aerosil
Applications
• Coating and Painting • Thin film and UPR • HTV and RTV Silicone Rubber • Adhesives and sealants • Printing ink • Make-up materials • Silicone Elastomers
Aerosil applications
Erosil is an example of additives and is widely used in the industry due to its unique properties, among which the following substances can be mentioned.
Thickening and volumizing agent:
In order to increase concentration and viscosity, this material is used in resin, rubber, paint, etc. used in various industries.
Abrasive:
It is used as a cleaner and polisher in toothpaste, soap and other detergents.
Antifoaming agent:
It is used to prevent foam formation in the food and pharmaceutical industries.
Toxic substance:
It is used to prevent sediment formation and clogging in pipes in water and wastewater treatment.
Abrasive:
It is used as a cleaner and polisher in toothpaste, soap and other detergents.
Separating agent:
It is used to separate materials from each other in different industries.
Mattifying agent:
Aerosil is used in paints and coatings to create a matte, velvety finish.
Reinforcing agent:
It is used in rubber and plastic to increase strength and mechanical properties.
Purifying agent:
It is common to use this material to remove impurities in the oil and gas refining process.
Benefits of using Erosil
The benefits of using Erosil are extensive and are as follows.
- Increasing the viscosity and concentration of liquids
- Preventing particles from settling and sedimenting
- Creating a matte and velvety look
- Cleaning and polishing of surfaces
- Increasing strength and mechanical properties
- Prevent foam formation
- Separation of materials from each other
- Oil and gas refining
safety tips
Inhalation of aerosol particles can be harmful to the lungs. On the other hand, contact with the skin of this substance causes symptoms such as redness, inflammation, etc. Therefore, it is strongly recommended to use a mask, goggles and gloves when working with this material. Also, direct contact of silica foam with skin and eyes should be avoided. Finally, if you swallow or inhale this substance, see a doctor immediately.
Care
Aerozil should be stored in a dry and cool place, in closed containers. It is better to have a proper ventilation system in the storage place.
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